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Giaconi N, Poggini L, Lupi M, Briganti M, Kumar A, Das TK, Sorrentino AL, Viglianisi C, Menichetti S, Naaman R, Sessoli R, Mannini M. Efficient Spin-Selective Electron Transport at Low Voltages of Thia-Bridged Triarylamine Hetero[4]helicenes Chemisorbed Monolayer. ACS Nano 2023; 17:15189-15198. [PMID: 37493644 PMCID: PMC10416567 DOI: 10.1021/acsnano.3c04878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 07/20/2023] [Indexed: 07/27/2023]
Abstract
The Chirality Induced Spin Selectivity (CISS) effect describes the capability of chiral molecules to act as spin filters discriminating flowing electrons according to their spin state. Within molecular spintronics, efforts are focused on developing chiral-molecule-based technologies to control the injection and coherence of spin-polarized currents. Herein, for this purpose, we study spin selectivity properties of a monolayer of a thioalkyl derivative of a thia-bridged triarylamine hetero[4]helicene chemisorbed on a gold surface. A stacked device assembled by embedding a monolayer of these molecules between ferromagnetic and diamagnetic electrodes exhibits asymmetric magnetoresistance with inversion of the signal according to the handedness of molecules, in line with the presence of the CISS effect. In addition, magnetically conductive atomic force microscopy reveals efficient electron spin filtering even at unusually low potentials. Our results demonstrate that thia[4]heterohelicenes represent key candidates for the development of chiral spintronic devices.
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Affiliation(s)
- Niccolò Giaconi
- Department
of Chemistry “Ugo Schiff” (DICUS) & INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Lorenzo Poggini
- Istituto
di Chimica dei Composti Organo-Metallici (ICCOM-CNR), Via Madonna del Piano 10, Sesto Fiorentino 50019, Italy
| | - Michela Lupi
- Department
of Chemistry “Ugo Schiff” (DICUS) & INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Matteo Briganti
- Department
of Chemistry “Ugo Schiff” (DICUS) & INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Anil Kumar
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot 76100, Israel
| | - Tapan K. Das
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot 76100, Israel
| | - Andrea L. Sorrentino
- Department
of Chemistry “Ugo Schiff” (DICUS) & INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Caterina Viglianisi
- Department
of Chemistry “Ugo Schiff” (DICUS) & INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Stefano Menichetti
- Department
of Chemistry “Ugo Schiff” (DICUS) & INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Ron Naaman
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot 76100, Israel
| | - Roberta Sessoli
- Department
of Chemistry “Ugo Schiff” (DICUS) & INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Matteo Mannini
- Department
of Chemistry “Ugo Schiff” (DICUS) & INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
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2
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Chiesa A, Privitera A, Macaluso E, Mannini M, Bittl R, Naaman R, Wasielewski MR, Sessoli R, Carretta S. Chirality-Induced Spin Selectivity: An Enabling Technology for Quantum Applications. Adv Mater 2023:e2300472. [PMID: 37170702 DOI: 10.1002/adma.202300472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/21/2023] [Indexed: 05/13/2023]
Abstract
Molecular spins are promising building blocks of future quantum technologies thanks to the unparalleled flexibility provided by chemistry, which allows the design of complex structures targeted for specific applications. However, their weak interaction with external stimuli makes it difficult to access their state at the single-molecule level, a fundamental tool for their use, for example, in quantum computing and sensing. Here, an innovative solution exploiting the interplay between chirality and magnetism using the chirality-induced spin selectivity effect on electron transfer processes is foreseen. It is envisioned to use a spin-to-charge conversion mechanism that can be realized by connecting a molecular spin qubit to a dyad where an electron donor and an electron acceptor are linked by a chiral bridge. By numerical simulations based on realistic parameters, it is shown that the chirality-induced spin selectivity effect could enable initialization, manipulation, and single-spin readout of molecular qubits and qudits even at relatively high temperatures.
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Affiliation(s)
- Alessandro Chiesa
- Università di Parma, Dipartimento di Scienze Matematiche, Fisiche e Informatiche, I-43124, Parma, Italy
- INFN-Sezione di Milano-Bicocca, gruppo collegato di Parma, 43124, Parma, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), I-50121, Firenze, Italy
| | - Alberto Privitera
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), I-50121, Firenze, Italy
- Department of Industrial Engineering (DIEF), University of Florence, I-50139, Firenze, Italy
- Department of Chemistry "U. Schiff" (DICUS), University of Florence, I-50019, Sesto Fiorentino, Italy
| | - Emilio Macaluso
- Università di Parma, Dipartimento di Scienze Matematiche, Fisiche e Informatiche, I-43124, Parma, Italy
- INFN-Sezione di Milano-Bicocca, gruppo collegato di Parma, 43124, Parma, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), I-50121, Firenze, Italy
| | - Matteo Mannini
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), I-50121, Firenze, Italy
- Department of Chemistry "U. Schiff" (DICUS), University of Florence, I-50019, Sesto Fiorentino, Italy
| | - Robert Bittl
- Freie Universität Berlin, Fachbereich Physik, Berlin Joint EPR Lab, D-14195, Berlin, Germany
| | - Ron Naaman
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Michael R Wasielewski
- Department of Chemistry and Institute for Sustainability and Energy at Northwestern, Northwestern University, Evanston, IL, 60208-3113, USA
| | - Roberta Sessoli
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), I-50121, Firenze, Italy
- Department of Chemistry "U. Schiff" (DICUS), University of Florence, I-50019, Sesto Fiorentino, Italy
| | - Stefano Carretta
- Università di Parma, Dipartimento di Scienze Matematiche, Fisiche e Informatiche, I-43124, Parma, Italy
- INFN-Sezione di Milano-Bicocca, gruppo collegato di Parma, 43124, Parma, Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), I-50121, Firenze, Italy
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3
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Santanni F, Briganti M, Serrano G, Salvadori E, Veneri A, Batistoni C, Russi SF, Menichetti S, Mannini M, Chiesa M, Sorace L, Sessoli R. VdW Mediated Strong Magnetic Exchange Interactions in Chains of Hydrogen-Free Sublimable Molecular Qubits. JACS Au 2023; 3:1250-1262. [PMID: 37124308 PMCID: PMC10131211 DOI: 10.1021/jacsau.3c00121] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 03/31/2023] [Accepted: 03/31/2023] [Indexed: 05/03/2023]
Abstract
Sulfur-rich molecular complexes of dithiolene-like ligands are appealing candidates as molecular spin qubits because spin coherence properties are enhanced in hydrogen-free environments. Herein, we employ the hydrogen-free mononegative 1,3,2-dithiazole-4-thione-5-thiolate (dttt-) ligand as an alternative to common dinegative dithiolate ligands. We report the first synthesis and structural characterization of its Cu2+, Ni2+, and Pt2+ neutral complexes. The XPS analysis of thermal deposition of [Cu(dttt)2] in UHV conditions indicates that films of intact molecules can be deposited on surfaces by sublimation. Thanks to a combined approach employing DC magnetometry and DFT calculations, we highlighted AF exchange interactions of 108 cm-1 and 36 cm-1 attributed to the two different polymorph phases. These couplings are exclusively mediated by S···S VdW interactions, which are facilitated by the absence of counterions and made particularly efficient by the diffuse electron density on S atoms. Furthermore, the spin dynamics of solid-state magnetically diluted samples was investigated. The longest observed T m is 2.3 μs at 30 K, which significantly diverges from the predicted T m > 100 μs. These results point to the diluting matrix severely affecting the coherence lifetime of Cu2+ species via different factors, such as the contributions of neighboring 14N nuclei and the formation of radical impurities in a non-completely controllable way. However, the ease of processing [Cu(dttt)2] via thermal sublimation can allow dispersion in matrices better suited for coherent spin manipulation of isolated molecules and the realization of AF-coupled VdW structures on surfaces.
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Affiliation(s)
- Fabio Santanni
- Dipartimento
di Chimica “Ugo Schiff” - DICUS, Università degli Studi di Firenze, Via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Firenze, Italy
- Consorzio
Interuniversitario Nazionale di Scienza e Tecnologia dei Materiali
- INSTM, Via G. Giusti
9, I-50121 Firenze, Italy
| | - Matteo Briganti
- Dipartimento
di Chimica “Ugo Schiff” - DICUS, Università degli Studi di Firenze, Via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Firenze, Italy
- Consorzio
Interuniversitario Nazionale di Scienza e Tecnologia dei Materiali
- INSTM, Via G. Giusti
9, I-50121 Firenze, Italy
| | - Giulia Serrano
- Consorzio
Interuniversitario Nazionale di Scienza e Tecnologia dei Materiali
- INSTM, Via G. Giusti
9, I-50121 Firenze, Italy
- Dipartimento
di Ingegneria Industriale - DIEF, Università
degli Studi di Firenze, Via Santa Marta 3, I-50139 Firenze, Italy
| | - Enrico Salvadori
- Consorzio
Interuniversitario Nazionale di Scienza e Tecnologia dei Materiali
- INSTM, Via G. Giusti
9, I-50121 Firenze, Italy
- Dipartimento
di Chimica e NIS Centre, Università
di Torino, Via P. Giuria 7, I-10125 Torino, Italy
| | - Alessandro Veneri
- Dipartimento
di Chimica “Ugo Schiff” - DICUS, Università degli Studi di Firenze, Via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Firenze, Italy
- Consorzio
Interuniversitario Nazionale di Scienza e Tecnologia dei Materiali
- INSTM, Via G. Giusti
9, I-50121 Firenze, Italy
| | - Chiara Batistoni
- Consorzio
Interuniversitario Nazionale di Scienza e Tecnologia dei Materiali
- INSTM, Via G. Giusti
9, I-50121 Firenze, Italy
| | - Sofia F. Russi
- Dipartimento
di Chimica e NIS Centre, Università
di Torino, Via P. Giuria 7, I-10125 Torino, Italy
| | - Stefano Menichetti
- Dipartimento
di Chimica “Ugo Schiff” - DICUS, Università degli Studi di Firenze, Via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Firenze, Italy
- Consorzio
Interuniversitario Nazionale di Scienza e Tecnologia dei Materiali
- INSTM, Via G. Giusti
9, I-50121 Firenze, Italy
| | - Matteo Mannini
- Dipartimento
di Chimica “Ugo Schiff” - DICUS, Università degli Studi di Firenze, Via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Firenze, Italy
- Consorzio
Interuniversitario Nazionale di Scienza e Tecnologia dei Materiali
- INSTM, Via G. Giusti
9, I-50121 Firenze, Italy
| | - Mario Chiesa
- Consorzio
Interuniversitario Nazionale di Scienza e Tecnologia dei Materiali
- INSTM, Via G. Giusti
9, I-50121 Firenze, Italy
- Dipartimento
di Chimica e NIS Centre, Università
di Torino, Via P. Giuria 7, I-10125 Torino, Italy
| | - Lorenzo Sorace
- Dipartimento
di Chimica “Ugo Schiff” - DICUS, Università degli Studi di Firenze, Via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Firenze, Italy
- Consorzio
Interuniversitario Nazionale di Scienza e Tecnologia dei Materiali
- INSTM, Via G. Giusti
9, I-50121 Firenze, Italy
| | - Roberta Sessoli
- Dipartimento
di Chimica “Ugo Schiff” - DICUS, Università degli Studi di Firenze, Via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Firenze, Italy
- Consorzio
Interuniversitario Nazionale di Scienza e Tecnologia dei Materiali
- INSTM, Via G. Giusti
9, I-50121 Firenze, Italy
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4
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Houard F, Cucinotta G, Guizouarn T, Suffren Y, Calvez G, Daiguebonne C, Guillou O, Artzner F, Mannini M, Bernot K. Metallogels: a novel approach for the nanostructuration of single-chain magnets. Mater Horiz 2023; 10:547-555. [PMID: 36426997 DOI: 10.1039/d2mh01158a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In this study we demonstrate that single-chain magnets (SCMs) can be assembled in gel phase and transferred intact on surface. We take advantage of a family of SCMs based on TbIII ions and nitronyl-nitroxides radicals functionalized with short alkyl chains known to form crystalline supramolecular nanotubes interacting with heptane acting as crystallizing solvent. When the radicals are functionalized with long aliphatic chains a robust gel is formed with similar structural and functional properties respect to its crystalline parent. Indeed, a small-angle X-ray scattering (SAXS) study unambiguously demonstrates that the gel is made of supramolecular nanotubes: the high stability of the gel allows the determination from SAXS data of precise nanotube metrics such as diameter, helical pitch and monoclinic cell of the folded 2D crystal lattice along the tube direction. Additionally, static and dynamic magnetic investigations show the persistence of the SCM behavior in the metallogel. Last, on-surface gelation provides thick films as well as sub-monolayer deposits of supramolecular nanotubes on surface as evidenced by atomic force microscopy (AFM) observations. This paves the road toward magnetic materials and devices made of SCMs profiting of their isolation on surface as individual chains.
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Affiliation(s)
- Felix Houard
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
| | - Guiseppe Cucinotta
- Dipartimento di Chimica "Ugo Schiff" (DICUS), Università degli Studi di Firenze, INSTM Research Unit of Firenze, Via della Lastruccia n.3-13, 50019 Sesto Fiorentino, FI, Italy.
| | - Thierry Guizouarn
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
| | - Yan Suffren
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
| | - Guillaume Calvez
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
| | - Carole Daiguebonne
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
| | - Olivier Guillou
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
| | - Franck Artzner
- CNRS, IPR (Institut de Physique de Rennes), UMR 6251, Université de Rennes 1, F-35000 Rennes, France
| | - Matteo Mannini
- Dipartimento di Chimica "Ugo Schiff" (DICUS), Università degli Studi di Firenze, INSTM Research Unit of Firenze, Via della Lastruccia n.3-13, 50019 Sesto Fiorentino, FI, Italy.
| | - Kevin Bernot
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
- Institut Universitaire de France, 1 rue Descartes, 75005, Paris, France
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5
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Briganti M, Serrano G, Poggini L, Sorrentino AL, Cortigiani B, de Camargo LC, Soares JF, Motta A, Caneschi A, Mannini M, Totti F, Sessoli R. Mixed-Sandwich Titanium(III) Qubits on Au(111): Electron Delocalization Ruled by Molecular Packing. Nano Lett 2022; 22:8626-8632. [PMID: 36256878 PMCID: PMC9650780 DOI: 10.1021/acs.nanolett.2c03161] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/07/2022] [Indexed: 06/15/2023]
Abstract
Organometallic sandwich complexes are versatile molecular systems that have been recently employed for single-molecule manipulation and spin sensing experiments. Among related organometallic compounds, the mixed-sandwich S = 1/2 complex (η8-cyclooctatetraene)(η5-cyclopentadienyl)titanium, here [CpTi(cot)], has attracted interest as a spin qubit because of the long coherence time. Here the structural and chemical properties of [CpTi(cot)] on Au(111) are investigated at the monolayer level by experimental and computational methods. Scanning tunneling microscopy suggests that adsorption occurs in two molecular orientations, lying and standing, with a 3:1 ratio. XPS data evidence that a fraction of the molecules undergo partial electron transfer to gold, while our computational analysis suggests that only the standing molecules experience charge delocalization toward the surface. Such a phenomenon depends on intermolecular interactions that stabilize the molecular packing in the monolayer. This orientation-dependent molecule-surface hybridization opens exciting perspectives for selective control of the molecule-substrate spin delocalization in hybrid interfaces.
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Affiliation(s)
- Matteo Briganti
- Department
of Chemistry “U. Schiff” (DICUS) and INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
- Department
of Chemistry, Federal University of Parana, Centro Politecnico, Jardim das Americas, 81530-900 Curitiba, PR Brazil
| | - Giulia Serrano
- Department
of Industrial Engineering (DIEF) and INSTM Research Unit, University of Florence, Via di Santa Marta, 3, 50139 Florence, Italy
| | - Lorenzo Poggini
- Department
of Chemistry “U. Schiff” (DICUS) and INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
- Institute
for Chemistry of OrganoMetallic Compounds (ICCOM-CNR), Via Madonna del Piano, 50019 Sesto Fiorentino (FI) Italy
| | - Andrea Luigi Sorrentino
- Department
of Chemistry “U. Schiff” (DICUS) and INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
- Department
of Industrial Engineering (DIEF) and INSTM Research Unit, University of Florence, Via di Santa Marta, 3, 50139 Florence, Italy
| | - Brunetto Cortigiani
- Department
of Chemistry “U. Schiff” (DICUS) and INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Luana Carol de Camargo
- Department
of Chemistry, Federal University of Parana, Centro Politecnico, Jardim das Americas, 81530-900 Curitiba, PR Brazil
| | - Jaísa Fernandes Soares
- Department
of Chemistry, Federal University of Parana, Centro Politecnico, Jardim das Americas, 81530-900 Curitiba, PR Brazil
| | - Alessandro Motta
- “La
Sapienza” and INSTM Research Unit, University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Andrea Caneschi
- Department
of Industrial Engineering (DIEF) and INSTM Research Unit, University of Florence, Via di Santa Marta, 3, 50139 Florence, Italy
| | - Matteo Mannini
- Department
of Chemistry “U. Schiff” (DICUS) and INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Federico Totti
- Department
of Chemistry “U. Schiff” (DICUS) and INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Roberta Sessoli
- Department
of Chemistry “U. Schiff” (DICUS) and INSTM Research
Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
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6
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Privitera A, Macaluso E, Chiesa A, Gabbani A, Faccio D, Giuri D, Briganti M, Giaconi N, Santanni F, Jarmouni N, Poggini L, Mannini M, Chiesa M, Tomasini C, Pineider F, Salvadori E, Carretta S, Sessoli R. Direct detection of spin polarization in photoinduced charge transfer through a chiral bridge. Chem Sci 2022; 13:12208-12218. [PMID: 36349110 PMCID: PMC9601404 DOI: 10.1039/d2sc03712b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Accepted: 10/03/2022] [Indexed: 12/26/2022] Open
Abstract
It is well assessed that the charge transport through a chiral potential barrier can result in spin-polarized charges. The possibility of driving this process through visible photons holds tremendous potential for several aspects of quantum information science, e.g., the optical control and readout of qubits. In this context, the direct observation of this phenomenon via spin-sensitive spectroscopies is of utmost importance to establish future guidelines to control photo-driven spin selectivity in chiral structures. Here, we provide direct proof that time-resolved electron paramagnetic resonance (EPR) can be used to detect long-lived spin polarization generated by photoinduced charge transfer through a chiral bridge. We propose a system comprising CdSe quantum dots (QDs), as a donor, and C60, as an acceptor, covalently linked through a saturated oligopeptide helical bridge (χ) with a rigid structure of ∼10 Å. Time-resolved EPR spectroscopy shows that the charge transfer in our system results in a C60 radical anion, whose spin polarization maximum is observed at longer times with respect to that of the photogenerated C60 triplet state. Notably, the theoretical modelling of the EPR spectra reveals that the observed features may be compatible with chirality-induced spin selectivity, but the electronic features of the QD do not allow the unambiguous identification of the CISS effect. Nevertheless, we identify which parameters need optimization for unambiguous detection and quantification of the phenomenon. This work lays the basis for the optical generation and direct manipulation of spin polarization induced by chirality. Our work provides a first attempt to directly detect the spin polarisation of Chiral-Induced Spin Selectivity (CISS) effect by studying the photoinduced electron transfer in a CdSe Quantum Dot-chiral bridge-fullerene derivative (QD–χ–C60) system.![]()
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Affiliation(s)
- Alberto Privitera
- Department of Chemistry and NIS Centre, University of Torino, Via Giuria 7, Torino, I-10125, Italy
- Department of Chemistry “U. Schiff” (DICUS), University of Florence & UdR INSTM Firenze, Via della Lastruccia 3-13, Sesto Fiorentino, I-50019, Italy
| | - Emilio Macaluso
- Department of Mathematical, Physical and Computer Sciences, University of Parma & UdR INSTM, I-43124, Parma, Italy
- INFN–Sezione di Milano-Bicocca, gruppo collegato di Parma, I-43124 Parma, Italy
| | - Alessandro Chiesa
- Department of Mathematical, Physical and Computer Sciences, University of Parma & UdR INSTM, I-43124, Parma, Italy
- INFN–Sezione di Milano-Bicocca, gruppo collegato di Parma, I-43124 Parma, Italy
| | - Alessio Gabbani
- Department of Chemistry and Industrial Chemistry, University of Pisa & UdR INSTM Pisa, Via Moruzzi 13, Pisa, I-56124, Italy
| | - Davide Faccio
- Department of Chemistry “Giacomo Ciamician”, University of Bologna, Via Selmi 2, Bologna, I-40126, Italy
| | - Demetra Giuri
- Department of Chemistry “Giacomo Ciamician”, University of Bologna, Via Selmi 2, Bologna, I-40126, Italy
| | - Matteo Briganti
- Department of Chemistry “U. Schiff” (DICUS), University of Florence & UdR INSTM Firenze, Via della Lastruccia 3-13, Sesto Fiorentino, I-50019, Italy
| | - Niccolò Giaconi
- Department of Chemistry “U. Schiff” (DICUS), University of Florence & UdR INSTM Firenze, Via della Lastruccia 3-13, Sesto Fiorentino, I-50019, Italy
- Department of Industrial Engineering (DIEF), University of Florence & UdR INSTM Firenze, Via Santa Marta 3, Firenze, I-50139, Italy
| | - Fabio Santanni
- Department of Chemistry “U. Schiff” (DICUS), University of Florence & UdR INSTM Firenze, Via della Lastruccia 3-13, Sesto Fiorentino, I-50019, Italy
| | - Nabila Jarmouni
- Department of Chemistry and Industrial Chemistry, University of Pisa & UdR INSTM Pisa, Via Moruzzi 13, Pisa, I-56124, Italy
| | - Lorenzo Poggini
- CNR-ICCOM, Via Madonna del Piano 10, Sesto Fiorentino, I-50019, Italy
| | - Matteo Mannini
- Department of Chemistry “U. Schiff” (DICUS), University of Florence & UdR INSTM Firenze, Via della Lastruccia 3-13, Sesto Fiorentino, I-50019, Italy
| | - Mario Chiesa
- Department of Chemistry and NIS Centre, University of Torino, Via Giuria 7, Torino, I-10125, Italy
| | - Claudia Tomasini
- Department of Chemistry “Giacomo Ciamician”, University of Bologna, Via Selmi 2, Bologna, I-40126, Italy
| | - Francesco Pineider
- Department of Chemistry and Industrial Chemistry, University of Pisa & UdR INSTM Pisa, Via Moruzzi 13, Pisa, I-56124, Italy
| | - Enrico Salvadori
- Department of Chemistry and NIS Centre, University of Torino, Via Giuria 7, Torino, I-10125, Italy
| | - Stefano Carretta
- Department of Mathematical, Physical and Computer Sciences, University of Parma & UdR INSTM, I-43124, Parma, Italy
- INFN–Sezione di Milano-Bicocca, gruppo collegato di Parma, I-43124 Parma, Italy
| | - Roberta Sessoli
- Department of Chemistry “U. Schiff” (DICUS), University of Florence & UdR INSTM Firenze, Via della Lastruccia 3-13, Sesto Fiorentino, I-50019, Italy
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7
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Houard F, Gendron F, Suffren Y, Guizouarn T, Dorcet V, Calvez G, Daiguebonne C, Guillou O, Le Guennic B, Mannini M, Bernot K. Single-chain magnet behavior in a finite linear hexanuclear molecule. Chem Sci 2021; 12:10613-10621. [PMID: 34447554 PMCID: PMC8356920 DOI: 10.1039/d1sc02033a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 07/09/2021] [Indexed: 11/21/2022] Open
Abstract
The careful monitoring of crystallization conditions of a mixture made of a TbIII building block and a substituted nitronyl-nitroxide that typically provides infinite coordination polymers (chains), affords a remarkably stable linear hexanuclear molecule made of six TbIII ions and five NIT radicals. The hexanuclear units are double-bridged by water molecules but ab initio calculations demonstrate that this bridge is inefficient in mediating any magnetic interaction other than a small dipolar antiferromagnetic coupling. Surprisingly the hexanuclears, despite being finite molecules, show a single-chain magnet (SCM) behavior. This results in a magnetic hysteresis at low temperature whose coercive field is almost doubled when compared to the chains. We thus demonstrate that finite linear molecules can display SCM magnetic relaxation, which is a strong asset for molecular data storage purposes because 1D magnetic relaxation is more robust than the relaxation mechanisms observed in single-molecule magnets (SMMs) where under-barrier magnetic relaxation can operate.
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Affiliation(s)
- Felix Houard
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F 35000 Rennes France
| | - Frederic Gendron
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F 35000 Rennes France
| | - Yan Suffren
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F 35000 Rennes France
| | - Thierry Guizouarn
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F 35000 Rennes France
| | - Vincent Dorcet
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F 35000 Rennes France
| | - Guillaume Calvez
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F 35000 Rennes France
| | - Carole Daiguebonne
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F 35000 Rennes France
| | - Olivier Guillou
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F 35000 Rennes France
| | - Boris Le Guennic
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F 35000 Rennes France
| | - Matteo Mannini
- LAboratory for Molecular Magnetism (LA.M.M.), Dipartimento di Chimica "Ugo Schiff"(DICUS), Università degli Studi di Firenze, INSTM, UdR Firenze Via della Lastruccia n. 3, Sesto Fiorentino (FI) 50019 Italy
| | - Kevin Bernot
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226 F 35000 Rennes France
- Institut Universitaire de France 1 rue Descartes 75005 Paris France
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8
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Giaconi N, Sorrentino AL, Poggini L, Lupi M, Polewczyk V, Vinai G, Torelli P, Magnani A, Sessoli R, Menichetti S, Sorace L, Viglianisi C, Mannini M. Stabilization of an Enantiopure Sub-monolayer of Helicene Radical Cations on a Au(111) Surface through Noncovalent Interactions. Angew Chem Int Ed Engl 2021; 60:15276-15280. [PMID: 33904633 PMCID: PMC8362206 DOI: 10.1002/anie.202103710] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/15/2021] [Indexed: 12/16/2022]
Abstract
In the past few years, the chirality and magnetism of molecules have received notable interest for the development of novel molecular devices. Chiral helicenes combine both these properties, and thus their nanostructuration is the first step toward developing new multifunctional devices. Here, we present a novel strategy to deposit a sub‐monolayer of enantiopure thia[4]helicene radical cations on a pre‐functionalized Au(111) substrate. This approach results in both the paramagnetic character and the chemical structure of these molecules being maintained at the nanoscale, as demonstrated by in‐house characterizations. Furthermore, synchrotron‐based X‐ray natural circular dichroism confirmed that the handedness of the thia[4]helicene is preserved on the surface.
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Affiliation(s)
- Niccolò Giaconi
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy.,Department of Industrial Engineering and INSTM Research Unit, University of Florence, Via Santa Marta 3, 50139, Florence, Italy
| | - Andrea Luigi Sorrentino
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy.,Department of Industrial Engineering and INSTM Research Unit, University of Florence, Via Santa Marta 3, 50139, Florence, Italy
| | - Lorenzo Poggini
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy.,Istituto di Chimica dei Composti Organometallici (ICCOM), CNR, Via Madonna del Piano, 10, 50019, Sesto Fiorentino, Italy
| | - Michela Lupi
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Vincent Polewczyk
- Istituto Officina dei Materiali (IOM), CNR, Laboratorio TASC, Area Science Park, S.S. 14 km 163.5, 34149, Trieste, Italy
| | - Giovanni Vinai
- Istituto Officina dei Materiali (IOM), CNR, Laboratorio TASC, Area Science Park, S.S. 14 km 163.5, 34149, Trieste, Italy
| | - Piero Torelli
- Istituto Officina dei Materiali (IOM), CNR, Laboratorio TASC, Area Science Park, S.S. 14 km 163.5, 34149, Trieste, Italy
| | - Agnese Magnani
- Department of Biotechnology, Chemistry and Pharmacy and INSTM Research Unit, University of Siena, Via Aldo Moro 2, 53100, Siena, Italy
| | - Roberta Sessoli
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Stefano Menichetti
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Lorenzo Sorace
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Caterina Viglianisi
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Matteo Mannini
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
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9
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Serrano G, Sorrentino AL, Poggini L, Cortigiani B, Goletti C, Sessoli R, Mannini M. Substrate mediated interaction of terbium(III) double-deckers with the TiO 2(110) surface. Phys Chem Chem Phys 2021; 23:12060-12067. [PMID: 34013308 DOI: 10.1039/d1cp00928a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A terbium(iii)-bis(phthalocyaninato) neutral complex was deposited on the rutile TiO2(110) surface, and their interaction was studied by Scanning Tunneling Microscopy (STM) and X-ray Photoelectron Spectroscopy (XPS). It was found that the TiO2 rutile surface favours the adsorption of isolated molecules adopting a lying down configuration with the phthalocyanine planes tilted by about 30° when they lie in the first layer. The electronic and chemical properties of the molecules on the surface were studied by XPS as a function of the TiO2(110) substrate preparation. This study evidences that strong molecule-substrate interactions are present and a charge transfer process occurs from the molecule to the surface.
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Affiliation(s)
- Giulia Serrano
- Department of Chemistry "U. Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy and Department of Industrial Engineering and INSTM Research Unit, University of Florence, Via Santa Marta 3, 50139 Florence (FI), Italy.
| | - Andrea Luigi Sorrentino
- Department of Chemistry "U. Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy and Department of Industrial Engineering and INSTM Research Unit, University of Florence, Via Santa Marta 3, 50139 Florence (FI), Italy.
| | - Lorenzo Poggini
- Department of Chemistry "U. Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy and Institute for Chemistry of OrganoMetallic Compounds (ICCOM-CNR), Via Madonna del Piano, 50019 Sesto Fiorentino (FI), Italy.
| | - Brunetto Cortigiani
- Department of Chemistry "U. Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Claudio Goletti
- Dipartimento di Fisica, Università degli Studi di Roma "Tor Vergata", Via della Ricerca Scientifica 1, 00133, Rome, Italy
| | - Roberta Sessoli
- Department of Chemistry "U. Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Matteo Mannini
- Department of Chemistry "U. Schiff" and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
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10
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Poggini L, Lunghi A, Collauto A, Barbon A, Armelao L, Magnani A, Caneschi A, Totti F, Sorace L, Mannini M. Chemisorption of nitronyl-nitroxide radicals on gold surface: an assessment of morphology, exchange interaction and decoherence time. Nanoscale 2021; 13:7613-7621. [PMID: 33881100 DOI: 10.1039/d1nr00640a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A combined Tof-SIMS, XPS and STM characterization has been performed to study the deposition of a sulphur-functionalized nitronyl nitroxide radical on Au(111) clearly demonstrating the chemisorption of intact molecules. Continuous -wave EPR characterization showed that the radical molecules maintain their paramagnetic character. Pulsed EPR measurements allowed to determine the decoherence time of the nanostructure at 80 K, which turned out to be comparable to the one measured in frozen solution and longer than previously reported for many radicals and other paramagnetic molecules at much lower temperatures. Furthermore, we conducted a state-of-the-art ab initio molecular dynamics study, suggesting different possible scenarios for chemisorption geometries and predicting the energetically favoured geometry. Calculation of the magnetic properties indicates a partial non-innocent role of the gold surface in determining the magnetic interactions between radicals in packed structures. This suggests that the observed EPR spectrum is to be attributed to low-density domains of disordered radicals interacting via dipolar interactions.
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Affiliation(s)
- Lorenzo Poggini
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, I-50019 Sesto Fiorentino, Italy. and ICCOM-CNR, via Madonna del Piano 10, 50019 Sesto, Fiorentino, Italy.
| | - Alessandro Lunghi
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, I-50019 Sesto Fiorentino, Italy.
| | - Alberto Collauto
- Department of Chemical Sciences and INSTM Research Unit, University of Padua, I-35131 Padova, Italy
| | - Antonio Barbon
- Department of Chemical Sciences and INSTM Research Unit, University of Padua, I-35131 Padova, Italy
| | - Lidia Armelao
- Department of Chemical Sciences and INSTM Research Unit, University of Padua, I-35131 Padova, Italy and Institute of Condensed Matter Chemistry and Technologies for Energy, National Research Council of Italy, ICMATE-CNR, via Marzolo 1, 35131 Padua, Italy and Department of Chemical Sciences and Materials Technologies, National Research Council of Italy, DSCTM - CNR, Piazzale A. Moro 7, 00185 Rome, Italy
| | - Agnese Magnani
- Department of Biotechnologies, Chemistry and Pharmacy, and INSTM Research Unit, University of Siena, I-53100 Siena, Italy
| | - Andrea Caneschi
- DIEF - Department of Industrial Engineering and INSTM Research Unit, University of Florence, Via S. Marta 3, I-50139 Florence, Italy
| | - Federico Totti
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, I-50019 Sesto Fiorentino, Italy.
| | - Lorenzo Sorace
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, I-50019 Sesto Fiorentino, Italy.
| | - Matteo Mannini
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence, I-50019 Sesto Fiorentino, Italy.
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11
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Hrubý J, Dvořák D, Squillantini L, Mannini M, van Slageren J, Herchel R, Nemec I, Neugebauer P. Co(II)-Based single-ion magnets with 1,1'-ferrocenediyl-bis(diphenylphosphine) metalloligands. Dalton Trans 2020; 49:11697-11707. [PMID: 32789384 DOI: 10.1039/d0dt01512a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Herein, we report on investigations of magnetic and spectroscopic properties of three heterobimetallic Fe(ii)-Co(ii) coordination compounds based on the tetracoordinate {CoP2X2} core encapsulated by dppf metalloligand, where X = Cl (1), Br (2), I (3), dppf = 1,1'-ferrocenediyl -bis(diphenylphosphine). The analysis of static magnetic data has revealed the presence of axial magnetic anisotropy in compounds (1) and (2) and this was further confirmed by high-frequency electron spin resonance (HF-ESR) spectroscopy. Dynamic magnetic data confirmed that (1) and (2) behave as field-induced Single-Ion Magnets (SIMs). Together with bulk studies, we have also tested the possibility of depositing (2) as thick films on Au(111), glass, and polymeric acetate by drop-casting as well as thermal sublimation, a key aspect for the development of future devices embedding these magnetic objects.
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Affiliation(s)
- J Hrubý
- Central European Institute of Technology, CEITEC BUT, Purkyňova 656/123, 61200 Brno, Czech Republic.
| | - D Dvořák
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 77147 Olomouc, Czech Republic
| | - L Squillantini
- Department of Chemistry "Ugo Schiff", University of Florence and INSTM Research Unit of Florence, via Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - M Mannini
- Department of Chemistry "Ugo Schiff", University of Florence and INSTM Research Unit of Florence, via Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - J van Slageren
- Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - R Herchel
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 77147 Olomouc, Czech Republic
| | - I Nemec
- Central European Institute of Technology, CEITEC BUT, Purkyňova 656/123, 61200 Brno, Czech Republic. and Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 77147 Olomouc, Czech Republic
| | - P Neugebauer
- Central European Institute of Technology, CEITEC BUT, Purkyňova 656/123, 61200 Brno, Czech Republic.
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12
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Cucinotta G, Poggini L, Giaconi N, Cini A, Gonidec M, Atzori M, Berretti E, Lavacchi A, Fittipaldi M, Chumakov AI, Rüffer R, Rosa P, Mannini M. Space Charge-Limited Current Transport Mechanism in Crossbar Junction Embedding Molecular Spin Crossovers. ACS Appl Mater Interfaces 2020; 12:31696-31705. [PMID: 32551478 PMCID: PMC8008390 DOI: 10.1021/acsami.0c07445] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/18/2020] [Indexed: 06/11/2023]
Abstract
Spin crossover complexes are among the most studied classes of molecular switches and have attracted considerable attention for their potential technological use as active units in multifunctional devices. A fundamental step toward their practical implementation is the integration in macroscopic devices adopting hybrid vertical architectures. First, the physical properties of technological interest shown by these materials in the bulk phase have to be retained once they are deposited on a solid surface. Herein, we describe the study of a hybrid molecular inorganic junction embedding the spin crossover complex [Fe(qnal)2] (qnal = quinoline-naphthaldehyde) as an active switchable thin film sandwiched within energy-optimized metallic electrodes. In these junctions, developed and characterized with the support of state of the art techniques including synchrotron Mössbauer source (SMS) spectroscopy and focused-ion beam scanning transmission electron microscopy, we observed that the spin state conversion of the Fe(II)-based spin crossover film is associated with a transition from a space charge-limited current (SCLC) transport mechanism with shallow traps to a SCLC mechanism characterized by the presence of an exponential distribution of traps concomitant with the spin transition temperature.
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Affiliation(s)
- Giuseppe Cucinotta
- Department of Chemistry
“U. Schiff” and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino, FI 50019, Italy
| | - Lorenzo Poggini
- Department of Chemistry
“U. Schiff” and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino, FI 50019, Italy
- CNRS, University of Bordeaux, ICMCB, UMR 5026, Pessac 33600, France
| | - Niccolò Giaconi
- Department of Chemistry
“U. Schiff” and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino, FI 50019, Italy
| | - Alberto Cini
- Department of Physics and Astronomy and
INSTM Research Unit, University of Florence, Via Sansone 1, Sesto Fiorentino, FI 50019, Italy
| | - Mathieu Gonidec
- CNRS, University of Bordeaux, ICMCB, UMR 5026, Pessac 33600, France
| | - Matteo Atzori
- Department of Chemistry
“U. Schiff” and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino, FI 50019, Italy
| | - Enrico Berretti
- Institute for Chemistry of OrganoMetallic
Compounds (ICCOM-CNR), Via Madonna del Piano, Sesto Fiorentino, FI 50019, Italy
| | - Alessandro Lavacchi
- Institute for Chemistry of OrganoMetallic
Compounds (ICCOM-CNR), Via Madonna del Piano, Sesto Fiorentino, FI 50019, Italy
| | - Maria Fittipaldi
- Department of Physics and Astronomy and
INSTM Research Unit, University of Florence, Via Sansone 1, Sesto Fiorentino, FI 50019, Italy
| | | | - Rudolf Rüffer
- ESRF-The European Synchrotron, Avenue des Martyrs 71, Grenoble 38000, France
| | - Patrick Rosa
- CNRS, University of Bordeaux, ICMCB, UMR 5026, Pessac 33600, France
| | - Matteo Mannini
- Department of Chemistry
“U. Schiff” and INSTM Research Unit, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino, FI 50019, Italy
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13
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Evrard Q, Houard F, Daiguebonne C, Calvez G, Suffren Y, Guillou O, Mannini M, Bernot K. Sonocrystallization as an Efficient Way to Control the Size, Morphology, and Purity of Coordination Compound Microcrystallites: Application to a Single-Chain Magnet. Inorg Chem 2020; 59:9215-9226. [PMID: 32521161 DOI: 10.1021/acs.inorgchem.0c01126] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The size, morphology, and purity control of coordination compound powders is a key stage for their conversion into materials and devices. In particular, surface science techniques require highly pure bulk materials with a narrow crystallite-size distribution together with straightforward, scalable, and reproducible crystallization procedures. In this work we demonstrate how sonocrystallization, i.e. the application of ultrasound during the crystallization process, can afford very quickly powders made of crystallites with controlled size, morphology, and purity. We show that this process drastically diminishes the crystallite-size distribution (low polydispersity indexes, PDI) and crystallite aspect ratio. By comparing sonicated samples with samples obtained by various silent crystallization conditions, we unambiguously show that the improvement in the crystallite morphology and size distribution is not due to any thermal effect but to the sonication of the crystallizing media. The application of sonocrystallization on crystallization batches of single-chain magnets (SCMs) maintains the chemical integrity of the SCMs together with their original magnetic behavior. Moreover, luminescent measurements show that sonocrystallization induces an efficient micromixing that drastically enhances the purity of the SCM powders. We thus propose that sonocrystallization, which is already used on organic or MOF compounds, can be applied to (magnetic) coordination compounds to readily afford bulk powders for characterization or shaping techniques that require pure, morphology- and crystallite-size-controlled powder samples.
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Affiliation(s)
- Quentin Evrard
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Félix Houard
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Carole Daiguebonne
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Guillaume Calvez
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Yan Suffren
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Olivier Guillou
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Matteo Mannini
- LAMM (Laboratory for Molecular Magnetism), Dipartimento di Chimica "Ugo Schiff" Università degli Studi di Firenze, INSTM, UdR Firenze Via della Lastruccia n. 3, Sesto Fiorentino (FI) 50019, Italy
| | - Kevin Bernot
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France.,Institut Universitaire de France (IUF), 1 rue Descartes, 75231 Paris, France
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14
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Serri M, Cucinotta G, Poggini L, Serrano G, Sainctavit P, Strychalska-Nowak J, Politano A, Bonaccorso F, Caneschi A, Cava RJ, Sessoli R, Ottaviano L, Klimczuk T, Pellegrini V, Mannini M. Enhancement of the Magnetic Coupling in Exfoliated CrCl 3 Crystals Observed by Low-Temperature Magnetic Force Microscopy and X-ray Magnetic Circular Dichroism. Adv Mater 2020; 32:e2000566. [PMID: 32390212 DOI: 10.1002/adma.202000566] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/21/2020] [Accepted: 04/14/2020] [Indexed: 06/11/2023]
Abstract
Magnetic crystals formed by 2D layers interacting by weak van der Waals forces are currently a hot research topic. When these crystals are thinned to nanometric size, they can manifest strikingly different magnetic behavior compared to the bulk form. This can be the result of, for example, quantum electronic confinement effects, the presence of defects, or pinning of the crystallographic structure in metastable phases induced by the exfoliation process. In this work, an investigation of the magnetism of micromechanically cleaved CrCl3 flakes with thickness >10 nm is performed. These flakes are characterized by superconducting quantum interference device magnetometry, surface-sensitive X-ray magnetic circular dichroism, and spatially resolved magnetic force microscopy. The results highlight an enhancement of the CrCl3 antiferromagnetic interlayer interaction that appears to be independent of the flake size when the thickness is tens of nanometers. The estimated exchange field is 9 kOe, representing an increase of ≈900% compared to the one of the bulk crystals. This effect can be attributed to the pinning of the high-temperature monoclinic structure, as recently suggested by polarized Raman spectroscopy investigations in thin (8-35 nm) CrCl3 flakes.
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Affiliation(s)
- Michele Serri
- Istituto Italiano di Tecnologia-Graphene Labs, via Morego 30, Genova, 16163, Italy
| | - Giuseppe Cucinotta
- Chemistry Department "U. Schiff" and INSTM RU, Università degli studi di Firenze, Via della Lastruccia 3-13, Sesto Fiorentino, 50019, Italy
| | - Lorenzo Poggini
- Chemistry Department "U. Schiff" and INSTM RU, Università degli studi di Firenze, Via della Lastruccia 3-13, Sesto Fiorentino, 50019, Italy
| | - Giulia Serrano
- Chemistry Department "U. Schiff" and INSTM RU, Università degli studi di Firenze, Via della Lastruccia 3-13, Sesto Fiorentino, 50019, Italy
- Department of Industrial Engineering DIEF, and INSTM RU, Università degli Studi di Firenze, Via di S. Marta 3, Firenze, 50139, Italy
| | - Philippe Sainctavit
- Institut de Mineralogie, de Physique des Materiaux et de Cosmochimie UMR 7590, CNRS, Sorbonne Université, MNHN, Paris, F-75005, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP 48, Gif-sur-Yvette, F-91192, France
| | - Judyta Strychalska-Nowak
- Faculty of Applied Physics and Mathematics, Advanced Materials Center Gdansk University of Technology, Gdansk, 80-233, Poland
| | - Antonio Politano
- Dipartimento di Scienze Fisiche e Chimiche (DSFC), Università dell'Aquila, Via Vetoio 10, L'Aquila, 67100, Italy
- CNR-IMM Istituto per la Microelettronica e Microsistemi, VIII strada 5, Catania, I-95121, Italy
| | - Francesco Bonaccorso
- Istituto Italiano di Tecnologia-Graphene Labs, via Morego 30, Genova, 16163, Italy
- BeDimensional Spa, Genoa, 16163, Italy
| | - Andrea Caneschi
- Department of Industrial Engineering DIEF, and INSTM RU, Università degli Studi di Firenze, Via di S. Marta 3, Firenze, 50139, Italy
| | - Robert J Cava
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA
| | - Roberta Sessoli
- Chemistry Department "U. Schiff" and INSTM RU, Università degli studi di Firenze, Via della Lastruccia 3-13, Sesto Fiorentino, 50019, Italy
| | - Luca Ottaviano
- Dipartimento di Scienze Fisiche e Chimiche (DSFC), Università dell'Aquila, Via Vetoio 10, L'Aquila, 67100, Italy
- CNR-SPIN UoS L'Aquila, Via Vetoio 46, L'Aquila, 67100, Italy
| | - Tomasz Klimczuk
- Faculty of Applied Physics and Mathematics, Advanced Materials Center Gdansk University of Technology, Gdansk, 80-233, Poland
| | - Vittorio Pellegrini
- Istituto Italiano di Tecnologia-Graphene Labs, via Morego 30, Genova, 16163, Italy
- BeDimensional Spa, Genoa, 16163, Italy
| | - Matteo Mannini
- Chemistry Department "U. Schiff" and INSTM RU, Università degli studi di Firenze, Via della Lastruccia 3-13, Sesto Fiorentino, 50019, Italy
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15
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Serrano G, Poggini L, Briganti M, Sorrentino AL, Cucinotta G, Malavolti L, Cortigiani B, Otero E, Sainctavit P, Loth S, Parenti F, Barra AL, Vindigni A, Cornia A, Totti F, Mannini M, Sessoli R. Quantum dynamics of a single molecule magnet on superconducting Pb(111). Nat Mater 2020; 19:546-551. [PMID: 32066930 DOI: 10.1038/s41563-020-0608-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Accepted: 01/07/2020] [Indexed: 06/10/2023]
Abstract
Magnetic materials interfaced with superconductors may reveal new physical phenomena with potential for quantum technologies. The use of molecules as magnetic components has already shown great promise, but the diversity of properties offered by the molecular realm remains largely unexplored. Here we investigate a submonolayer of tetrairon(III) propeller-shaped single molecule magnets deposited on a superconducting lead surface. This material combination reveals a strong influence of the superconductor on the spin dynamics of the single molecule magnet. It is shown that the superconducting transition to the condensate state switches the single molecule magnet from a blocked magnetization state to a resonant quantum tunnelling regime. Our results open perspectives to control single molecule magnetism via superconductors and to use single molecule magnets as local probes of the superconducting state.
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Affiliation(s)
- Giulia Serrano
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy.
- Department of Industrial Engineering and INSTM Research Unit, University of Florence, Florence, Italy.
| | - Lorenzo Poggini
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
| | - Matteo Briganti
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
- Departamento de Química, Universidade Federal do Paraná, Curitiba, Brazil
| | - Andrea Luigi Sorrentino
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
- Department of Industrial Engineering and INSTM Research Unit, University of Florence, Florence, Italy
| | - Giuseppe Cucinotta
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
| | - Luigi Malavolti
- Institute FMQ, University of Stuttgart & Max Planck Institute for Solid State Research, Stuttgart, Germany
| | - Brunetto Cortigiani
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
| | - Edwige Otero
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, France
| | - Philippe Sainctavit
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, France
- IMPMC, UMR7590 CNRS, Sorbonne Université, MNHN, Paris, France
| | - Sebastian Loth
- Institute FMQ, University of Stuttgart & Max Planck Institute for Solid State Research, Stuttgart, Germany
| | - Francesca Parenti
- Department of Chemical and Geological Sciences and INSTM Research Unit, University of Modena and Reggio Emilia, Modena, Italy
| | | | | | - Andrea Cornia
- Department of Chemical and Geological Sciences and INSTM Research Unit, University of Modena and Reggio Emilia, Modena, Italy
| | - Federico Totti
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
| | - Matteo Mannini
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy
| | - Roberta Sessoli
- Department of Chemistry 'Ugo Schiff' and INSTM Research Unit, University of Florence, Sesto Fiorentino, Italy.
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16
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Cini A, Poggini L, Chumakov AI, Rüffer R, Spina G, Wattiaux A, Duttine M, Gonidec M, Fittipaldi M, Rosa P, Mannini M. Synchrotron-based Mössbauer spectroscopy characterization of sublimated spin crossover molecules. Phys Chem Chem Phys 2020; 22:6626-6637. [PMID: 32159166 DOI: 10.1039/c9cp04464g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The spin crossover (SCO) efficiency of [57Fe(bpz)2(phen)] (where bpz = bis(pyrazol-1-yl)borohydride and phen = 9,10-phenantroline) molecules deposited on gold substrates was investigated by means of synchrotron Mössbauer spectroscopy. The spin transition was driven thermally, or light induced via the LIESST (light induced excited spin-state trapping) effect. Both sets of measurements show that, once deposited on a gold substrate, the efficiency of the SCO mechanism is modified with respect to molecules in the bulk phase. A correlation in the distribution of hyperfine parameters in the sublimated films, not evidenced so far in the bulk phase, is reported. This translates into geometrical distortions of the first coordination sphere of the iron atom that seem to correlate with the decreased spin conversion. The work reported clearly shows the potentiality of synchrotron Mössbauer spectroscopy for the characterization of nanostructured Fe-based SCO systems, thus resulting as a key tool in view of their applications in innovative nanoscale devices.
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Affiliation(s)
- Alberto Cini
- Department of Physics and Astronomy, University of Florence and INSTM Research Unit of Florence, via Sansone 1, I-50019 Sesto Fiorentino (FI), Italy.
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17
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Houard F, Evrard Q, Calvez G, Suffren Y, Daiguebonne C, Guillou O, Gendron F, Le Guennic B, Guizouarn T, Dorcet V, Mannini M, Bernot K. Chiral Supramolecular Nanotubes of Single‐Chain Magnets. Angew Chem Int Ed Engl 2020; 59:780-784. [DOI: 10.1002/anie.201913019] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Indexed: 11/12/2022]
Affiliation(s)
- Felix Houard
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Quentin Evrard
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Guillaume Calvez
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Yan Suffren
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Carole Daiguebonne
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Olivier Guillou
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Frédéric Gendron
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Boris Le Guennic
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Thierry Guizouarn
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Vincent Dorcet
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Matteo Mannini
- Laboratory for Molecular Magnetism (LA.M.M.)Dipartimento di Chimica “Ugo Schiff”Università degli Studi di FirenzeINSTM, UdR Firenze Via della Lastruccia n. 3 Sesto Fiorentino (FI) 50019 Italy
| | - Kevin Bernot
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
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18
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Evrard Q, Cucinotta G, Houard F, Calvez G, Suffren Y, Daiguebonne C, Guillou O, Caneschi A, Mannini M, Bernot K. Self-assembly of a terbium(III) 1D coordination polymer on mica. Beilstein J Nanotechnol 2019; 10:2440-2448. [PMID: 31921522 PMCID: PMC6941415 DOI: 10.3762/bjnano.10.234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 11/22/2019] [Indexed: 06/10/2023]
Abstract
The terbium(III) ion is a particularly suitable candidate for the creation of surface-based magnetic and luminescent devices. In the present work, we report the epitaxial growth of needle-like objects composed of [Tb(hfac)3·2H2O] n (where hfac = hexafluoroacetylacetonate) polymeric units on muscovite mica, which is observed by atomic force microscopy. The needle-like shape mimics the structure observed in the crystalline bulk material. The growth of this molecular organization is assisted by water adsorption on the freshly air-cleaved muscovite mica. This deposition technique allows for the observation of a significant amount of nanochains grown along three preferential directions 60° apart from another. The magnetic properties and the luminescence of the nanochains can be detected without the need of surface-dedicated instrumentation. The intermediate value of the observed luminescence lifetime of the deposits (132 µs) compared to that of the bulk (375 µs) and the CHCl3 solution (13 µs) further reinforces the idea of water-induced growth.
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Affiliation(s)
- Quentin Evrard
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Giuseppe Cucinotta
- Laboratory for Molecular Magnetism (LA.M.M.), Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze, INSTM Research Unit of Firenze, Via della Lastruccia n. 3-13, Sesto Fiorentino (FI) I-50019, Italy
| | - Felix Houard
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Guillaume Calvez
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Yan Suffren
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Carole Daiguebonne
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Olivier Guillou
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Andrea Caneschi
- Dipartimento di Ingegneria Industriale - DIEF, Università degli Studi di Firenze, INSTM Research Unit of Firenze, Via di Santa Marta n. 3, Firenze - 50139, Italy
| | - Matteo Mannini
- Laboratory for Molecular Magnetism (LA.M.M.), Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze, INSTM Research Unit of Firenze, Via della Lastruccia n. 3-13, Sesto Fiorentino (FI) I-50019, Italy
| | - Kevin Bernot
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
- Institut Universitaire de France (IUF), Ministère de l'Enseignement supérieur, de la Recherche et de l'Innovation, 1 rue Descartes, 75231 Paris Cedex 05, France
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19
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Houard F, Evrard Q, Calvez G, Suffren Y, Daiguebonne C, Guillou O, Gendron F, Le Guennic B, Guizouarn T, Dorcet V, Mannini M, Bernot K. Chiral Supramolecular Nanotubes of Single‐Chain Magnets. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201913019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Felix Houard
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Quentin Evrard
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Guillaume Calvez
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Yan Suffren
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Carole Daiguebonne
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Olivier Guillou
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Frédéric Gendron
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Boris Le Guennic
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Thierry Guizouarn
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Vincent Dorcet
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Matteo Mannini
- Laboratory for Molecular Magnetism (LA.M.M.)Dipartimento di Chimica “Ugo Schiff”Università degli Studi di FirenzeINSTM, UdR Firenze Via della Lastruccia n. 3 Sesto Fiorentino (FI) 50019 Italy
| | - Kevin Bernot
- Univ RennesINSA RennesCNRSISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
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20
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Poggini L, Londi G, Milek M, Naim A, Lanzilotto V, Cortigiani B, Bondino F, Magnano E, Otero E, Sainctavit P, Arrio MA, Juhin A, Marchivie M, Khusniyarov MM, Totti F, Rosa P, Mannini M. Surface effects on a photochromic spin-crossover iron(ii) molecular switch adsorbed on highly oriented pyrolytic graphite. Nanoscale 2019; 11:20006-20014. [PMID: 31603165 DOI: 10.1039/c9nr05947d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Thin films of an iron(ii) complex with a photochromic diarylethene-based ligand and featuring a spin-crossover behaviour have been grown by sublimation in ultra-high vacuum on highly oriented pyrolytic graphite and spectroscopically characterized through high-resolution X-ray and ultraviolet photoemission, as well as via X-ray absorption. Temperature-dependent studies demonstrated that the thermally induced spin-crossover is preserved at a sub-monolayer (0.7 ML) coverage. Although the photochromic ligand ad hoc integrated into the complex allows the photo-switching of the spin state of the complex at room temperature both in bulk and for a thick film on highly oriented pyrolytic graphite, this photomagnetic effect is not observed in sub-monolayer deposits. Ab initio calculations justify this behaviour as the result of specific adsorbate-substrate interactions leading to the stabilization of the photoinactive form of the diarylethene ligand over photoactive one on the surface.
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Affiliation(s)
- Lorenzo Poggini
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Firenze, University of Firenze, I-50019 Sesto Fiorentino, Italy.
| | - Giacomo Londi
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Firenze, University of Firenze, I-50019 Sesto Fiorentino, Italy.
| | - Magdalena Milek
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstr. 1, 91058, Erlangen, Germany
| | - Ahmad Naim
- CNRS, Univ. Bordeaux, ICMCB, UMR5026, F-33600 Pessac, France
| | - Valeria Lanzilotto
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Firenze, University of Firenze, I-50019 Sesto Fiorentino, Italy.
| | - Brunetto Cortigiani
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Firenze, University of Firenze, I-50019 Sesto Fiorentino, Italy.
| | - Federica Bondino
- CNR-IOM, Laboratorio TASC, Basovizza SS-14, Km 163.5, 34149 Trieste, Italy
| | - Elena Magnano
- CNR-IOM, Laboratorio TASC, Basovizza SS-14, Km 163.5, 34149 Trieste, Italy
| | - Edwige Otero
- Synchrotron SOLEIL L'Orme des Merisiers Saint Aubin, BP 48 91192, Gif sur Yvette, France
| | - Philippe Sainctavit
- Synchrotron SOLEIL L'Orme des Merisiers Saint Aubin, BP 48 91192, Gif sur Yvette, France and IMPMC-UMR7590, CNRS, Sorbonne université, MNHN 4 place Jussieu, 75005 Paris, France
| | - Marie-Anne Arrio
- IMPMC-UMR7590, CNRS, Sorbonne université, MNHN 4 place Jussieu, 75005 Paris, France
| | - Amélie Juhin
- IMPMC-UMR7590, CNRS, Sorbonne université, MNHN 4 place Jussieu, 75005 Paris, France
| | | | - Marat M Khusniyarov
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstr. 1, 91058, Erlangen, Germany
| | - Federico Totti
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Firenze, University of Firenze, I-50019 Sesto Fiorentino, Italy.
| | - Patrick Rosa
- CNRS, Univ. Bordeaux, ICMCB, UMR5026, F-33600 Pessac, France
| | - Matteo Mannini
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Firenze, University of Firenze, I-50019 Sesto Fiorentino, Italy.
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21
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Giaccherini A, Cucinotta G, Martinuzzi S, Berretti E, Oberhauser W, Lavacchi A, Lepore GO, Montegrossi G, Romanelli M, De Luca A, Innocenti M, Moggi Cecchi V, Mannini M, Buccianti A, Di Benedetto F. Green and scalable synthesis of nanocrystalline kuramite. Beilstein J Nanotechnol 2019; 10:2073-2083. [PMID: 31728255 PMCID: PMC6839557 DOI: 10.3762/bjnano.10.202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 10/04/2019] [Indexed: 06/10/2023]
Abstract
The new generation of solar cells aims to overcome many of the issues created by silicon-based devices (e.g., decommissioning, flexibility and high-energy production costs). Due to the scarcity of the resources involved in the process and the need for the reduction of potential pollution, a greener approach to solar cell material production is required. Among others, the solvothermal approach for the synthesis of nanocrystalline Cu-Sn-S (CTS) materials fulfils all of these requirements. The material constraints must be considered, not only for the final product, but for the whole production process. Most works reporting the successful synthesis of CTS have employed surfactants, high pressure or noxious solvents. In this paper, we demonstrate the synthesis of nanocrystalline kuramite by means of a simpler, greener and scalable solvothermal synthesis. We exploited a multianalytical characterization approach (X-ray diffraction, extended X-ray absorption fine structure, field emission scanning electron microscopy, Raman spectroscopy and electronic microprobe analysis (EMPA)) to discriminate kuramite from other closely related polymorphs. Moreover, we confirmed the presence of structural defects due to a relevant antisite population.
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Affiliation(s)
- Andrea Giaccherini
- Department of Earth Sciences, University of Florence, Via La Pira 4, 50121 Firenze, Italy
- Department of Industrial Engineering, University of Florence, Via di S. Marta 3, 50139 Firenze, Italy
- INSTM Florence Research Unit, Via Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Giuseppe Cucinotta
- Department of Chemistry, University of Florence, Via Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Stefano Martinuzzi
- Department of Chemistry, University of Florence, Via Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Enrico Berretti
- ICCOM-CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy
| | - Werner Oberhauser
- ICCOM-CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy
| | | | - Giovanni Orazio Lepore
- IOM-CNR, c/o European Synchrotron Radiation Facility 71, avenue des Martyrs, 38043 Grenoble Cedex 9, France
| | | | - Maurizio Romanelli
- Department of Earth Sciences, University of Florence, Via La Pira 4, 50121 Firenze, Italy
| | - Antonio De Luca
- Department of Chemistry, University of Florence, Via Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Massimo Innocenti
- INSTM Florence Research Unit, Via Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
- Department of Chemistry, University of Florence, Via Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
- ICCOM-CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy
| | - Vanni Moggi Cecchi
- Museo di Storia Naturale, Sistema Museale di Ateneo dell’Università degli Studi di Firenze, Via La Pira 4, 50121 Firenze, Italy
| | - Matteo Mannini
- INSTM Florence Research Unit, Via Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
- Department of Chemistry, University of Florence, Via Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy
| | - Antonella Buccianti
- Department of Earth Sciences, University of Florence, Via La Pira 4, 50121 Firenze, Italy
| | - Francesco Di Benedetto
- Department of Earth Sciences, University of Florence, Via La Pira 4, 50121 Firenze, Italy
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22
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Cornia A, Mannini M, Sessoli R, Gatteschi D. Propeller-Shaped Fe4
and Fe3
M Molecular Nanomagnets: A Journey from Crystals to Addressable Single Molecules. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801266] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andrea Cornia
- Department of Chemical and Geological Sciences and INSTM Research Unit; University of Modena and Reggio Emilia; 41125 Modena Italy
| | - Matteo Mannini
- Department of Chemistry “Ugo Schiff” and INSTM Research Unit; University of Florence; 50019 Sesto Fiorentino (FI) Italy
| | - Roberta Sessoli
- Department of Chemistry “Ugo Schiff” and INSTM Research Unit; University of Florence; 50019 Sesto Fiorentino (FI) Italy
- Research Area Firenze; Istituto di Chimica dei Composti Organometallici - ICCOM-CNR; 50019 Sesto Fiorentino (FI) Italy
| | - Dante Gatteschi
- Department of Chemistry “Ugo Schiff” and INSTM Research Unit; University of Florence; 50019 Sesto Fiorentino (FI) Italy
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23
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Malavolti L, Briganti M, Hänze M, Serrano G, Cimatti I, McMurtrie G, Otero E, Ohresser P, Totti F, Mannini M, Sessoli R, Loth S. Tunable Spin-Superconductor Coupling of Spin 1/2 Vanadyl Phthalocyanine Molecules. Nano Lett 2018; 18:7955-7961. [PMID: 30452271 DOI: 10.1021/acs.nanolett.8b03921] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Atomic-scale magnetic moments in contact with superconductors host rich physics based on the emergence of Yu-Shiba-Rusinov (YSR) magnetic bound states within the superconducting condensate. Here, we focus on a magnetic bound state induced into Pb nanoislands by individual vanadyl phthalocyanine (VOPc) molecules deposited on the Pb surface. The VOPc molecule is characterized by a spin magnitude of 1/2 arising from a well-isolated singly occupied d xy-orbital and is a promising candidate for a molecular spin qubit with long coherence times. X-ray magnetic circular dichroism (XMCD) measurements show that the molecular spin remains unperturbed even for molecules directly deposited on the Pb surface. Scanning tunneling spectroscopy and density functional theory (DFT) calculations identify two adsorption geometries for this "asymmetric" molecule (i.e., absence of a horizontal symmetry plane): (a) oxygen pointing toward the vacuum with the Pc laying on the Pb, showing negligible spin-superconductor interaction, and (b) oxygen pointing toward the Pb, presenting an efficient interaction with the Pb and promoting a Yu-Shiba-Rusinov bound state. Additionally, we find that in the first case a YSR state can be induced smoothly by exerting mechanical force on the molecules with the scanning tunneling microscope (STM) tip. This allows the interaction strength to be tuned continuously from an isolated molecular spin case, through the quantum critical point (where the bound state energy is zero) and beyond. DFT indicates that a gradual bending of the VO bond relative to the Pc ligand plane promoted by the STM tip can modify the interaction in a continuously tunable manner. The ability to induce a tunable YSR state in the superconductor suggests the possibility of introducing coupled spins on superconductors with switchable interaction.
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Affiliation(s)
- Luigi Malavolti
- Institute for Functional Matter and Quantum Technologies , University of Stuttgart , 70569 Stuttgart , Germany
- Max Planck Institute for the Structure and Dynamics of Matter , 22761 Hamburg , Germany
- Max Planck Institute for Solid State Research , 70569 Stuttgart , Germany
| | - Matteo Briganti
- Dipartimento di Chimica "Ugo Schiff" & INSTM RU , Università degli Studi di Firenze , Via della Lastruccia 3-13 , 150019 Sesto Fiorentino (Firenze) , Italy
| | - Max Hänze
- Institute for Functional Matter and Quantum Technologies , University of Stuttgart , 70569 Stuttgart , Germany
- Max Planck Institute for the Structure and Dynamics of Matter , 22761 Hamburg , Germany
- Max Planck Institute for Solid State Research , 70569 Stuttgart , Germany
| | - Giulia Serrano
- Dipartimento di Chimica "Ugo Schiff" & INSTM RU , Università degli Studi di Firenze , Via della Lastruccia 3-13 , 150019 Sesto Fiorentino (Firenze) , Italy
| | - Irene Cimatti
- Dipartimento di Chimica "Ugo Schiff" & INSTM RU , Università degli Studi di Firenze , Via della Lastruccia 3-13 , 150019 Sesto Fiorentino (Firenze) , Italy
| | - Gregory McMurtrie
- Institute for Functional Matter and Quantum Technologies , University of Stuttgart , 70569 Stuttgart , Germany
- Max Planck Institute for the Structure and Dynamics of Matter , 22761 Hamburg , Germany
- Max Planck Institute for Solid State Research , 70569 Stuttgart , Germany
| | - Edwige Otero
- Synchrotron SOLEIL , 4891192 Gif-sur-Yvette , France
| | | | - Federico Totti
- Dipartimento di Chimica "Ugo Schiff" & INSTM RU , Università degli Studi di Firenze , Via della Lastruccia 3-13 , 150019 Sesto Fiorentino (Firenze) , Italy
| | - Matteo Mannini
- Dipartimento di Chimica "Ugo Schiff" & INSTM RU , Università degli Studi di Firenze , Via della Lastruccia 3-13 , 150019 Sesto Fiorentino (Firenze) , Italy
| | - Roberta Sessoli
- Dipartimento di Chimica "Ugo Schiff" & INSTM RU , Università degli Studi di Firenze , Via della Lastruccia 3-13 , 150019 Sesto Fiorentino (Firenze) , Italy
| | - Sebastian Loth
- Institute for Functional Matter and Quantum Technologies , University of Stuttgart , 70569 Stuttgart , Germany
- Max Planck Institute for the Structure and Dynamics of Matter , 22761 Hamburg , Germany
- Max Planck Institute for Solid State Research , 70569 Stuttgart , Germany
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24
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Kappler JP, Otero E, Li W, Joly L, Schmerber G, Muller B, Scheurer F, Leduc F, Gobaut B, Poggini L, Serrano G, Choueikani F, Lhotel E, Cornia A, Sessoli R, Mannini M, Arrio MA, Sainctavit P, Ohresser P. Ultralow-temperature device dedicated to soft X-ray magnetic circular dichroism experiments. J Synchrotron Radiat 2018; 25:1727-1735. [PMID: 30407183 PMCID: PMC6225739 DOI: 10.1107/s1600577518012717] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 09/07/2018] [Indexed: 06/08/2023]
Abstract
A new ultralow-temperature setup dedicated to soft X-ray absorption spectroscopy and X-ray magnetic circular dichroism (XMCD) experiments is described. Two experiments, performed on the DEIMOS beamline (SOLEIL synchrotron), demonstrate the outstanding performance of this new platform in terms of the lowest achievable temperature under X-ray irradiation (T = 220 mK), the precision in controlling the temperature during measurements as well as the speed of the cooling-down and warming-up procedures. Moreover, owing to the new design of the setup, the eddy-current power is strongly reduced, allowing fast scanning of the magnetic field in XMCD experiments; these performances lead to a powerful device for X-ray spectroscopies on synchrotron-radiation beamlines facilities.
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Affiliation(s)
- J.-P. Kappler
- Synchrotron SOLEIL, L’Orme des Merisiers, BP 48, 91192 Gif-sur-Yvette, France
| | - E. Otero
- Synchrotron SOLEIL, L’Orme des Merisiers, BP 48, 91192 Gif-sur-Yvette, France
| | - W. Li
- Synchrotron SOLEIL, L’Orme des Merisiers, BP 48, 91192 Gif-sur-Yvette, France
| | - L. Joly
- Synchrotron SOLEIL, L’Orme des Merisiers, BP 48, 91192 Gif-sur-Yvette, France
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, 67034 Strasbourg, France
| | - G. Schmerber
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, 67034 Strasbourg, France
| | - B. Muller
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, 67034 Strasbourg, France
| | - F. Scheurer
- Synchrotron SOLEIL, L’Orme des Merisiers, BP 48, 91192 Gif-sur-Yvette, France
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, 23 rue du Loess, 67034 Strasbourg, France
| | - F. Leduc
- Synchrotron SOLEIL, L’Orme des Merisiers, BP 48, 91192 Gif-sur-Yvette, France
| | - B. Gobaut
- Synchrotron SOLEIL, L’Orme des Merisiers, BP 48, 91192 Gif-sur-Yvette, France
| | - L. Poggini
- Department of Chemistry ‘U. Schiff’ and INSTM RU, University of Firenze, Via della Lastruccia n. 3, 50019 Sesto Fiorentino (FI), Italy
| | - G. Serrano
- Department of Chemistry ‘U. Schiff’ and INSTM RU, University of Firenze, Via della Lastruccia n. 3, 50019 Sesto Fiorentino (FI), Italy
| | - F. Choueikani
- Synchrotron SOLEIL, L’Orme des Merisiers, BP 48, 91192 Gif-sur-Yvette, France
| | - E. Lhotel
- Institut Néel, 25 rue des Martyrs, 38042 Grenoble, France
| | - A. Cornia
- Department of Chemical and Geological Sciences and INSTM RU, University of Modena and Reggio Emilia, via G. Campi 103, I-41125 Modena, Italy
| | - R. Sessoli
- Department of Chemistry ‘U. Schiff’ and INSTM RU, University of Firenze, Via della Lastruccia n. 3, 50019 Sesto Fiorentino (FI), Italy
| | - M. Mannini
- Department of Chemistry ‘U. Schiff’ and INSTM RU, University of Firenze, Via della Lastruccia n. 3, 50019 Sesto Fiorentino (FI), Italy
| | - M.-A. Arrio
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS, Sorbonne Université, IRD, MNHN, UMR 7590, 4 place Jussieu, 75252 Paris Cedex 05, France
| | - Ph. Sainctavit
- Synchrotron SOLEIL, L’Orme des Merisiers, BP 48, 91192 Gif-sur-Yvette, France
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS, Sorbonne Université, IRD, MNHN, UMR 7590, 4 place Jussieu, 75252 Paris Cedex 05, France
| | - P. Ohresser
- Synchrotron SOLEIL, L’Orme des Merisiers, BP 48, 91192 Gif-sur-Yvette, France
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25
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Serrano G, Velez-Fort E, Cimatti I, Cortigiani B, Malavolti L, Betto D, Ouerghi A, Brookes NB, Mannini M, Sessoli R. Magnetic bistability of a TbPc 2 submonolayer on a graphene/SiC(0001) conductive electrode. Nanoscale 2018; 10:2715-2720. [PMID: 29372744 DOI: 10.1039/c7nr08372f] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The alteration of the properties of single-molecule magnets (SMMs) due to the interaction with metallic electrodes is detrimental to their employment in spintronic devices. Conversely, herein we show that the terbium(iii) bis-phthalocyaninato complex, TbPc2, maintains its SMM behavior up to 9 K on a graphene/SiC(0001) substrate, making this alternative conductive layer highly promising for molecular spintronic applications.
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Affiliation(s)
- G Serrano
- Department of Chemistry and INSTM RU, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy.
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26
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Pedrini A, Poggini L, Tudisco C, Torelli M, Giuffrida AE, Bertani F, Cimatti I, Otero E, Ohresser P, Sainctavit P, Suman M, Condorelli GG, Mannini M, Dalcanale E. Self-Assembly of TbPc 2 Single-Molecule Magnets on Surface through Multiple Hydrogen Bonding. Small 2018; 14:1702572. [PMID: 29226595 DOI: 10.1002/smll.201702572] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 09/26/2017] [Indexed: 06/07/2023]
Abstract
The complexation between 2-ureido-4[1H]-pyrimidinone (UPy) and 2,7-diamido-1,8-naphthyridine (NaPy) is used to promote the mild chemisorption of a UPy-functionalized terbium(III) double decker system on a silicon surface. The adopted strategy allows the single-molecule magnet behavior of the system to be maintained unaltered on the surface.
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Affiliation(s)
- Alessandro Pedrini
- Department of Chemistry, Life Sciences and Environmental Sustainability & INSTM RU of Parma, Parco delle Scienze 17/A, 43124, Parma, Italy
| | - Lorenzo Poggini
- Department of Chemistry "Ugo Schiff" & INSTM RU of Firenze University of Firenze, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy
| | - Cristina Tudisco
- Department of Chemical Science & INSTM RU of Catania, University of Catania, Viale Andrea Doria 6, Catania, Italy
| | - Martina Torelli
- Department of Chemistry, Life Sciences and Environmental Sustainability & INSTM RU of Parma, Parco delle Scienze 17/A, 43124, Parma, Italy
| | - Antonino E Giuffrida
- Department of Chemical Science & INSTM RU of Catania, University of Catania, Viale Andrea Doria 6, Catania, Italy
| | - Federico Bertani
- Department of Chemistry, Life Sciences and Environmental Sustainability & INSTM RU of Parma, Parco delle Scienze 17/A, 43124, Parma, Italy
| | - Irene Cimatti
- Department of Chemistry "Ugo Schiff" & INSTM RU of Firenze University of Firenze, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy
| | - Edwige Otero
- Synchrotron SOLEIL, L'Orme des Merisiers Saint Aubin, BP 48, 91192, Gif sur Yvette, France
| | - Philippe Ohresser
- Synchrotron SOLEIL, L'Orme des Merisiers Saint Aubin, BP 48, 91192, Gif sur Yvette, France
| | - Philippe Sainctavit
- Synchrotron SOLEIL, L'Orme des Merisiers Saint Aubin, BP 48, 91192, Gif sur Yvette, France
- IMPMC-UMR7590, CNRS, UPMC, IRD, MNHN, 4 place Jussieu, 75005, Paris, France
| | - Michele Suman
- Barilla G.R. F.lli SpA, Advanced Laboratory Research, Via Mantova 166, 43122, Parma, Italy
| | - Guglielmo G Condorelli
- Department of Chemical Science & INSTM RU of Catania, University of Catania, Viale Andrea Doria 6, Catania, Italy
| | - Matteo Mannini
- Department of Chemistry "Ugo Schiff" & INSTM RU of Firenze University of Firenze, Via della Lastruccia 3, 50019, Sesto Fiorentino, Italy
| | - Enrico Dalcanale
- Department of Chemistry, Life Sciences and Environmental Sustainability & INSTM RU of Parma, Parco delle Scienze 17/A, 43124, Parma, Italy
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27
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Paoletti C, He M, Salvo P, Melai B, Calisi N, Mannini M, Cortigiani B, Bellagambi FG, Swager TM, Di Francesco F, Pucci A. Room temperature amine sensors enabled by sidewall functionalization of single-walled carbon nanotubes. RSC Adv 2018; 8:5578-5585. [PMID: 30820317 PMCID: PMC6390973 DOI: 10.1039/c7ra13304a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 01/29/2018] [Indexed: 11/21/2022] Open
Abstract
A new series of sidewall modified single-walled carbon nanotubes (SWCNTs) with perfluorophenyl molecules bearing carboxylic acid or methyl ester moieties are herein reported. Pristine and functionalized SWCNTs (p-SWCNTs and f-SWCNTs, respectively) were characterized by X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and scanning electron microscopy (SEM). The nitrene-based functionalization provided intact SWCNTs with methyl 4-azido-2,3,5,6-tetrafluorobenzoate (SWCNT-N-C6F4CO2CH3) and 4-azido-2,3,5,6-tetrafluorobenzoic acid (SWCNT-N-C6F4CO2H) attached every 213 and 109 carbon atoms, respectively. Notably, SWCNT-N-C6F4CO2H was sensitive in terms of the percentage of conductance variation from 5 to 40 ppm of ammonia (NH3) and trimethylamine (TMA) with a two-fold higher variation of conductance compared to p-SWCNTs at 40 ppm. The sensors are highly sensitive to NH3 and TMA as they showed very low responses (0.1%) toward 200 ppm of volatile organic compounds (VOCs) containing various functional groups representative of different classes of analytes such as benzene, tetrahydrofurane (THF), hexane, ethyl acetate (AcOEt), ethanol, acetonitrile (CH3CN), acetone and chloroform (CHCl3). Our system is a promising candidate for the realization of single-use chemiresistive sensors for the detection of threshold crossing by low concentrations of gaseous NH3 and TMA at room temperature.
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Affiliation(s)
- Clara Paoletti
- Department of Chemistry and Industrial Chemistry, University of PisaVia G. Moruzzi 1356124 PisaItaly
| | - Maggie He
- Department of Chemistry, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology77 Massachusetts AvenueCambridgeMA 02139USA
| | - Pietro Salvo
- Department of Chemistry and Industrial Chemistry, University of PisaVia G. Moruzzi 1356124 PisaItaly
- Institute of Clinical Physiology, National Council of Research (IFC-CNR)Via G. Moruzzi 1Pisa56124Italy
| | - Bernardo Melai
- Department of Chemistry and Industrial Chemistry, University of PisaVia G. Moruzzi 1356124 PisaItaly
| | - Nicola Calisi
- Department of Chemistry and Industrial Chemistry, University of PisaVia G. Moruzzi 1356124 PisaItaly
- Department of Chemistry “U. Schiff”, University of FlorenceVia della Lastruccia 3-13, 50019 Sesto Fiorentino (FI)Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM)Via G. Giusti 950121 FirenzeItaly
| | - Matteo Mannini
- Department of Chemistry “U. Schiff”, University of FlorenceVia della Lastruccia 3-13, 50019 Sesto Fiorentino (FI)Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM)Via G. Giusti 950121 FirenzeItaly
| | - Brunetto Cortigiani
- Department of Chemistry “U. Schiff”, University of FlorenceVia della Lastruccia 3-13, 50019 Sesto Fiorentino (FI)Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM)Via G. Giusti 950121 FirenzeItaly
| | - Francesca G. Bellagambi
- Department of Chemistry and Industrial Chemistry, University of PisaVia G. Moruzzi 1356124 PisaItaly
| | - Timothy M. Swager
- Department of Chemistry, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology77 Massachusetts AvenueCambridgeMA 02139USA
| | - Fabio Di Francesco
- Department of Chemistry and Industrial Chemistry, University of PisaVia G. Moruzzi 1356124 PisaItaly
| | - Andrea Pucci
- Department of Chemistry and Industrial Chemistry, University of PisaVia G. Moruzzi 1356124 PisaItaly
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28
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Tesi L, Salman Z, Cimatti I, Pointillart F, Bernot K, Mannini M, Sessoli R. Isotope effects on the spin dynamics of single-molecule magnets probed using muon spin spectroscopy. Chem Commun (Camb) 2018; 54:7826-7829. [DOI: 10.1039/c8cc04703k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Subtle isotopic effects on spin dynamics are captured using Muon Spin Relaxation experiments on isotopically enriched Dy-based single molecule magnets.
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Affiliation(s)
- Lorenzo Tesi
- Department of Chemistry “U. Schiff” – Università degli Studi di Firenze and INSTM UdR Firenze
- Sesto Fiorentino
- Italy
| | - Zaher Salman
- Laboratory for Muon Spin Spectroscopy
- Paul Scherrer Institute
- CH-5232 Villigen PSI
- Switzerland
| | - Irene Cimatti
- Department of Chemistry “U. Schiff” – Università degli Studi di Firenze and INSTM UdR Firenze
- Sesto Fiorentino
- Italy
| | - Fabrice Pointillart
- Université de Rennes
- INSA Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226
- 35000 Rennes
| | - Kevin Bernot
- Université de Rennes
- INSA Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226
- 35000 Rennes
| | - Matteo Mannini
- Department of Chemistry “U. Schiff” – Università degli Studi di Firenze and INSTM UdR Firenze
- Sesto Fiorentino
- Italy
| | - Roberta Sessoli
- Department of Chemistry “U. Schiff” – Università degli Studi di Firenze and INSTM UdR Firenze
- Sesto Fiorentino
- Italy
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29
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Pisanu A, Speltini A, Vigani B, Ferrari F, Mannini M, Calisi N, Cortigiani B, Caneschi A, Quadrelli P, Profumo A, Malavasi L. Enhanced hydrogen photogeneration by bulk g-C3N4 through a simple and efficient oxidation route. Dalton Trans 2018; 47:6772-6778. [DOI: 10.1039/c8dt00276b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydrogen production rate under visible light of bulk g-C3N4 has been improved 8-fold by a simple oxidation process.
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Affiliation(s)
- Ambra Pisanu
- Department of Chemistry and INSTM RU Pavia
- Pavia
- Italy
| | | | - Barbara Vigani
- Department of Drug Sciences
- University of Pavia
- 27100 Pavia
- Italy
| | - Franca Ferrari
- Department of Drug Sciences
- University of Pavia
- 27100 Pavia
- Italy
| | - Matteo Mannini
- Department of Chemistry “U. Schiff” and INSTM RU
- University of Florence
- 50019 Sesto Fiorentino
- Italy
| | - Nicola Calisi
- Department of Chemistry “U. Schiff” and INSTM RU
- University of Florence
- 50019 Sesto Fiorentino
- Italy
| | - Brunetto Cortigiani
- Department of Chemistry “U. Schiff” and INSTM RU
- University of Florence
- 50019 Sesto Fiorentino
- Italy
| | - Andrea Caneschi
- Department of Chemistry “U. Schiff” and INSTM RU
- University of Florence
- 50019 Sesto Fiorentino
- Italy
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30
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Serri M, Mannini M, Poggini L, Vélez-Fort E, Cortigiani B, Sainctavit P, Rovai D, Caneschi A, Sessoli R. Low-Temperature Magnetic Force Microscopy on Single Molecule Magnet-Based Microarrays. Nano Lett 2017; 17:1899-1905. [PMID: 28165249 DOI: 10.1021/acs.nanolett.6b05208] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The magnetic properties of some single molecule magnets (SMM) on surfaces can be strongly modified by the molecular packing in nanometric films/aggregates or by interactions with the substrate, which affect the molecular orientation and geometry. Detailed investigations of the magnetism of thin SMM films and nanostructures are necessary for the development of spin-based molecular devices, however this task is challenged by the limited sensitivity of laboratory-based magnetometric techniques and often requires access to synchrotron light sources to perform surface sensitive X-ray magnetic circular dichroism (XMCD) investigations. Here we show that low-temperature magnetic force microscopy is an alternative powerful laboratory tool able to extract the field dependence of the magnetization and to identify areas of in-plane and perpendicular magnetic anisotropy in microarrays of the SMM terbium(III) bis-phthalocyaninato (TbPc2) neutral complex grown as nanosized films on SiO2 and perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA), and this is in agreement with data extracted from nonlocal XMCD measurements performed on homogeneous TbPc2/PTCDA films.
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Affiliation(s)
- Michele Serri
- Laboratory for Molecular Magnetism (LA.M.M.), Department of Chemistry "Ugo Schiff", Università degli Studi di Firenze via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Italy
- INSTM Research Unit of Firenze , via della Lastruccia 3, I-50019 Sesto Fiorentino, Italy
| | - Matteo Mannini
- Laboratory for Molecular Magnetism (LA.M.M.), Department of Chemistry "Ugo Schiff", Università degli Studi di Firenze via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Italy
- INSTM Research Unit of Firenze , via della Lastruccia 3, I-50019 Sesto Fiorentino, Italy
| | - Lorenzo Poggini
- Laboratory for Molecular Magnetism (LA.M.M.), Department of Chemistry "Ugo Schiff", Università degli Studi di Firenze via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Italy
- INSTM Research Unit of Firenze , via della Lastruccia 3, I-50019 Sesto Fiorentino, Italy
| | - Emilio Vélez-Fort
- European Synchrotron Radiation Facility , 71 Av. Martyrs, F-38043 Grenoble 9, France
| | - Brunetto Cortigiani
- Laboratory for Molecular Magnetism (LA.M.M.), Department of Chemistry "Ugo Schiff", Università degli Studi di Firenze via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Italy
- INSTM Research Unit of Firenze , via della Lastruccia 3, I-50019 Sesto Fiorentino, Italy
| | - Philippe Sainctavit
- Institut de Mineralogie, de Physique des Materiaux et de Cosmochimie, UMR 7590, CNRS, UPMC, IRD, MNHN , F-75005 Paris, France
- Synchrotron SOLEIL, L'Orme des Merisiers , Saint-Aubin-BP 48, F-91192 Gif-sur-Yvette, France
| | - Donella Rovai
- Laboratory for Molecular Magnetism (LA.M.M.), Department of Chemistry "Ugo Schiff", Università degli Studi di Firenze via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Italy
- INSTM Research Unit of Firenze , via della Lastruccia 3, I-50019 Sesto Fiorentino, Italy
| | - Andrea Caneschi
- Laboratory for Molecular Magnetism (LA.M.M.), Department of Chemistry "Ugo Schiff", Università degli Studi di Firenze via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Italy
- INSTM Research Unit of Firenze , via della Lastruccia 3, I-50019 Sesto Fiorentino, Italy
| | - Roberta Sessoli
- Laboratory for Molecular Magnetism (LA.M.M.), Department of Chemistry "Ugo Schiff", Università degli Studi di Firenze via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Italy
- INSTM Research Unit of Firenze , via della Lastruccia 3, I-50019 Sesto Fiorentino, Italy
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31
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Pedrini A, Perfetti M, Mannini M, Dalcanale E. Formation of TbPc 2 Single-Molecule Magnets' Covalent 1D Structures via Acyclic Diene Metathesis. ACS Omega 2017; 2:517-521. [PMID: 31457452 PMCID: PMC6641184 DOI: 10.1021/acsomega.6b00546] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 02/02/2017] [Indexed: 06/10/2023]
Abstract
We present here a reaction scheme to connect TbPc2 single-molecule magnets into 1D architectures using acyclic diene metathesis. To investigate the impact of the bonding through aliphatic chains on the magnetic properties of TbPc2, we isolate and characterize the dimeric species obtained as one of the products of the reaction. Remarkably, the magnetic properties are only slightly modified after the formation of the bond between molecules, enlightening the great potential of this reaction scheme.
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Affiliation(s)
- Alessandro Pedrini
- Dipartimento
di Scienze Chimiche, della Vita e della Sostenibilità Ambientale
& INSTM RU of Parma, Università
degli Studi di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| | - Mauro Perfetti
- Dipartimento
di Chimica “Ugo Schiff” & INSTM RU of Firenze, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - Matteo Mannini
- Dipartimento
di Chimica “Ugo Schiff” & INSTM RU of Firenze, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - Enrico Dalcanale
- Dipartimento
di Scienze Chimiche, della Vita e della Sostenibilità Ambientale
& INSTM RU of Parma, Università
degli Studi di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
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Feltham HLC, Dumas C, Mannini M, Otero E, Sainctavit P, Sessoli R, Meledandri CJ, Brooker S. Proof of Principle: Immobilisation of Robust Cu II3 Tb III -Macrocycles on Small, Suitably Pre-functionalised Gold Nanoparticles. Chemistry 2017; 23:2517-2521. [PMID: 27981632 DOI: 10.1002/chem.201604821] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Indexed: 11/11/2022]
Abstract
In a proof-of-principle study, a soluble macrocyclic single-molecule magnet (SMM) containing a CuII3 TbIII magnetic core was covalently grafted onto small gold nanoparticles pre-functionalised with carboxylate-terminated tethers. A modified microemulsion method allowed production of the small and monodisperse nanoparticles (approximately 3.5 nm in diameter) for the chemisorption of a large amount of intact macrocyclic complexes in the hybrid system.
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Affiliation(s)
- Humphrey L C Feltham
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechonology, University of Otago, P.O. Box 56, Dunedin, 9054, New Zealand
| | - Christophe Dumas
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechonology, University of Otago, P.O. Box 56, Dunedin, 9054, New Zealand
| | - Matteo Mannini
- Dipartimento di Chimica "Ugo Schiff" and UdR INSTM, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Edwige Otero
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP 48, 91192, Gif-sur-Yvette, France
| | - Philippe Sainctavit
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP 48, 91192, Gif-sur-Yvette, France.,IMPMC, UMR 7590, CNRS, UPMC, IRD, MNHN, 75005, Paris, France
| | - Roberta Sessoli
- Dipartimento di Chimica "Ugo Schiff" and UdR INSTM, Università degli Studi di Firenze, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Carla J Meledandri
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechonology, University of Otago, P.O. Box 56, Dunedin, 9054, New Zealand
| | - Sally Brooker
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechonology, University of Otago, P.O. Box 56, Dunedin, 9054, New Zealand
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Feltham HLC, Dumas C, Mannini M, Otero E, Sainctavit P, Sessoli R, Meledandri CJ, Brooker S. Cover Picture: Proof of Principle: Immobilisation of Robust Cu II
3
Tb III
-Macrocycles on Small, Suitably Pre-functionalised Gold Nanoparticles (Chem. Eur. J. 11/2017). Chemistry 2017. [DOI: 10.1002/chem.201605677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Humphrey L. C. Feltham
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechonology; University of Otago, P.O. Box 56; Dunedin 9054 New Zealand
| | - Christophe Dumas
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechonology; University of Otago, P.O. Box 56; Dunedin 9054 New Zealand
| | - Matteo Mannini
- Dipartimento di Chimica “Ugo Schiff” and UdR INSTM; Università degli Studi di Firenze; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
| | - Edwige Otero
- Synchrotron SOLEIL; L'Orme des Merisiers; Saint-Aubin-BP 48 91192 Gif-sur-Yvette France
| | - Philippe Sainctavit
- Synchrotron SOLEIL; L'Orme des Merisiers; Saint-Aubin-BP 48 91192 Gif-sur-Yvette France
- IMPMC; UMR 7590, CNRS, UPMC, IRD, MNHN; 75005 Paris France
| | - Roberta Sessoli
- Dipartimento di Chimica “Ugo Schiff” and UdR INSTM; Università degli Studi di Firenze; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
| | - Carla J. Meledandri
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechonology; University of Otago, P.O. Box 56; Dunedin 9054 New Zealand
| | - Sally Brooker
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechonology; University of Otago, P.O. Box 56; Dunedin 9054 New Zealand
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34
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Feltham HLC, Dumas C, Mannini M, Otero E, Sainctavit P, Sessoli R, Meledandri CJ, Brooker S. Proof of Principle: Immobilisation of Robust Cu II
3
Tb III
-Macrocycles on Small, Suitably Pre-functionalised Gold Nanoparticles. Chemistry 2017. [DOI: 10.1002/chem.201605717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Humphrey L. C. Feltham
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechonology; University of Otago, P.O. Box 56; Dunedin 9054 New Zealand
| | - Christophe Dumas
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechonology; University of Otago, P.O. Box 56; Dunedin 9054 New Zealand
| | - Matteo Mannini
- Dipartimento di Chimica “Ugo Schiff” and UdR INSTM; Università degli Studi di Firenze; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
| | - Edwige Otero
- Synchrotron SOLEIL; L'Orme des Merisiers; Saint-Aubin-BP 48 91192 Gif-sur-Yvette France
| | - Philippe Sainctavit
- Synchrotron SOLEIL; L'Orme des Merisiers; Saint-Aubin-BP 48 91192 Gif-sur-Yvette France
- IMPMC; UMR 7590, CNRS, UPMC, IRD, MNHN; 75005 Paris France
| | - Roberta Sessoli
- Dipartimento di Chimica “Ugo Schiff” and UdR INSTM; Università degli Studi di Firenze; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
| | - Carla J. Meledandri
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechonology; University of Otago, P.O. Box 56; Dunedin 9054 New Zealand
| | - Sally Brooker
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechonology; University of Otago, P.O. Box 56; Dunedin 9054 New Zealand
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Perfetti M, Serri M, Poggini L, Mannini M, Rovai D, Sainctavit P, Heutz S, Sessoli R. Molecular Order in Buried Layers of TbPc2 Single-Molecule Magnets Detected by Torque Magnetometry. Adv Mater 2016; 28:6946-6951. [PMID: 27232580 DOI: 10.1002/adma.201600791] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 03/17/2016] [Indexed: 06/05/2023]
Abstract
Cantilever torque magnetometry is used to elucidate the orientation of magnetic molecules in thin films. The technique allows depth-resolved investigations by intercalating a layer of anisotropic magnetic molecules in a film of its isotropic analogues. The proof-of-concept is here demonstrated with the single-molecule magnet TbPc2 evidencing also an exceptional long-range templating effect on substrates coated by the organic molecule perylene-3,4,9,10-tetracarboxylic dianhydride.
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Affiliation(s)
- Mauro Perfetti
- Department of Chemistry "U. Schiff" Università di Firenze & INSTM RU Firenze, via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Michele Serri
- Department of Chemistry "U. Schiff" Università di Firenze & INSTM RU Firenze, via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Lorenzo Poggini
- Department of Chemistry "U. Schiff" Università di Firenze & INSTM RU Firenze, via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Matteo Mannini
- Department of Chemistry "U. Schiff" Università di Firenze & INSTM RU Firenze, via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Donella Rovai
- Department of Chemistry "U. Schiff" Università di Firenze & INSTM RU Firenze, via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
| | - Philippe Sainctavit
- Institut de Mineralogie, de Physique des Materiaux et de Cosmochimie, UMR 7590, CNRS, UPMC, IRD, MNHN, F-75005, Paris, France
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP 48, 91192, Gif-sur-Yvette, France
| | - Sandrine Heutz
- Department of Materials and London Centre for Nanotechnology, Imperial College London, London, SW7 2AZ, UK
| | - Roberta Sessoli
- Department of Chemistry "U. Schiff" Università di Firenze & INSTM RU Firenze, via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy
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Kiefl E, Mannini M, Bernot K, Yi X, Amato A, Leviant T, Magnani A, Prokscha T, Suter A, Sessoli R, Salman Z. Robust Magnetic Properties of a Sublimable Single-Molecule Magnet. ACS Nano 2016; 10:5663-5669. [PMID: 27139335 DOI: 10.1021/acsnano.6b01817] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The organization of single-molecule magnets (SMMs) on surfaces via thermal sublimation is a prerequisite for the development of future devices for spintronics exploiting the richness of properties offered by these magnetic molecules. However, a change in the SMM properties due to the interaction with specific surfaces is usually observed. Here we present a rare example of an SMM system that can be thermally sublimated on gold surfaces while maintaining its intact chemical structure and magnetic properties. Muon spin relaxation and ac susceptibility measurements are used to demonstrate that, unlike other SMMs, the magnetic properties of this system in thin films are very similar to those in the bulk, throughout the full volume of the film, including regions near the metal and vacuum interfaces. These results exhibit the robustness of chemical and magnetic properties of this complex and provide important clues for the development of nanostructures based on SMMs.
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Affiliation(s)
- Evan Kiefl
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut , CH-5232 Villigen PSI, Switzerland
| | - Matteo Mannini
- Department of Chemistry "Ugo Schiff", University of Florence & INSTM RU Firenze , Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - Kevin Bernot
- INSA, ISCR, UMR 6226, F-35708 RENNES , 20 Avenue des Buttes de Coësmes CS70839, 35708 Rennes Cedex, France
| | - Xiaohui Yi
- INSA, ISCR, UMR 6226, F-35708 RENNES , 20 Avenue des Buttes de Coësmes CS70839, 35708 Rennes Cedex, France
| | - Alex Amato
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut , CH-5232 Villigen PSI, Switzerland
| | - Tom Leviant
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut , CH-5232 Villigen PSI, Switzerland
- Department of Physics, Technion - Israel Institute of Technology , Haifa 32000, Israel
| | - Agnese Magnani
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena & INSTM RU Siena , Via A. Moro, 2 53100 Siena, Italy
| | - Thomas Prokscha
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut , CH-5232 Villigen PSI, Switzerland
| | - Andreas Suter
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut , CH-5232 Villigen PSI, Switzerland
| | - Roberta Sessoli
- Department of Chemistry "Ugo Schiff", University of Florence & INSTM RU Firenze , Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
| | - Zaher Salman
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut , CH-5232 Villigen PSI, Switzerland
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Aloisi G, Dolci D, Carlà M, Mannini M, Piuzzi B, Caneschi A. A capacitive probe for Electron Spin Resonance detection. J Magn Reson 2016; 263:116-121. [PMID: 26774649 DOI: 10.1016/j.jmr.2015.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 12/26/2015] [Accepted: 12/29/2015] [Indexed: 06/05/2023]
Abstract
The use of the magnetic field associated with Maxwell displacement current in a capacitor is proposed for the detection of Electron Spin Resonance. A probe based on this concept is realized and successfully tested with CW radio-frequency in the band going from 200MHz to 1GHz with a DPPH sample. A significant increase of Signal to Noise Ratio is observed while increasing the frequency.
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Affiliation(s)
- Giovanni Aloisi
- Department of Chemistry and INSTM Research Unit, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy.
| | - David Dolci
- Department of Chemistry and INSTM Research Unit, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy; Department of Physics, University of Florence, Via G. Sansone 1, 50019 Sesto Fiorentino, FI, Italy
| | - Marcello Carlà
- Department of Physics, University of Florence, Via G. Sansone 1, 50019 Sesto Fiorentino, FI, Italy
| | - Matteo Mannini
- Department of Chemistry and INSTM Research Unit, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy
| | - Barbara Piuzzi
- AllTek Innovation S.r.l., Piazza Divisione Julia 4, 33040 Corno di Rosazzo, UD, Italy
| | - Andrea Caneschi
- Department of Chemistry and INSTM Research Unit, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy
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38
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Tesi L, Lucaccini E, Cimatti I, Perfetti M, Mannini M, Atzori M, Morra E, Chiesa M, Caneschi A, Sorace L, Sessoli R. Quantum coherence in a processable vanadyl complex: new tools for the search of molecular spin qubits. Chem Sci 2015; 7:2074-2083. [PMID: 29899933 PMCID: PMC5968563 DOI: 10.1039/c5sc04295j] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 12/11/2015] [Indexed: 12/11/2022] Open
Abstract
A multitechnique investigation of an evaporable vanadyl spin system with long-lived quantum coherence that self-assembles on gold.
Electronic spins in different environments are currently investigated as potential qubits, i.e. the logic units of quantum computers. These have to retain memory of their quantum state for a sufficiently long time (phase memory time, Tm) allowing quantum operations to be performed. For molecular based spin qubits, strategies to increase phase coherence by removing nuclear spins are rather well developed, but it is now crucial to address the problem of the rapid increase of the spin–lattice relaxation rate, T1–1, with increasing temperature that hampers their use at room-temperature. Herein, thanks to the combination of pulsed EPR spectroscopy and AC susceptometry we evidence that an evaporable vanadyl complex of formula VO(dpm)2, where dpm– is the anion of dipivaloylmethane, presents a combination of very promising features for potential application as molecular spin-qubit. The spin–lattice relaxation time, T1, studied in detail through AC susceptometry, decreases slowly with increasing temperature and, more surprisingly, it is not accelerated by the application of an external field up to several Teslas. State-of-the art phase memory times for molecular spin systems in protiated environment are detected by pulsed EPR also in moderate dilution, with values of 2.7 μs at 5 K and 2.1 μs at 80 K. Low temperature scanning tunnel microscopy and X-ray photoelectron spectroscopy in situ investigations reveal that intact molecules sublimated in ultra-high vacuum spontaneously form an ordered monolayer on Au(111), opening the perspective of electric access to the quantum memory of ensembles of spin qubits that can be scaled down to the single molecule.
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Affiliation(s)
- Lorenzo Tesi
- Department of Chemistry "Ugo Schiff" , University of Florence & INSTM RU of Florence , Via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy
| | - Eva Lucaccini
- Department of Chemistry "Ugo Schiff" , University of Florence & INSTM RU of Florence , Via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy
| | - Irene Cimatti
- Department of Chemistry "Ugo Schiff" , University of Florence & INSTM RU of Florence , Via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy
| | - Mauro Perfetti
- Department of Chemistry "Ugo Schiff" , University of Florence & INSTM RU of Florence , Via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy
| | - Matteo Mannini
- Department of Chemistry "Ugo Schiff" , University of Florence & INSTM RU of Florence , Via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy
| | - Matteo Atzori
- Department of Chemistry "Ugo Schiff" , University of Florence & INSTM RU of Florence , Via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy
| | - Elena Morra
- Department of Chemistry , University of Turin & NIS Centre , via P. Giuria 7 , 10125 , Torino , Italy . ;
| | - Mario Chiesa
- Department of Chemistry , University of Turin & NIS Centre , via P. Giuria 7 , 10125 , Torino , Italy . ;
| | - Andrea Caneschi
- Department of Chemistry "Ugo Schiff" , University of Florence & INSTM RU of Florence , Via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy
| | - Lorenzo Sorace
- Department of Chemistry "Ugo Schiff" , University of Florence & INSTM RU of Florence , Via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy
| | - Roberta Sessoli
- Department of Chemistry "Ugo Schiff" , University of Florence & INSTM RU of Florence , Via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy
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Lascialfari L, Pescitelli G, Brandi A, Mannini M, Berti D, Cicchi S. Urea vs. carbamate groups: a comparative study in a chiral C2 symmetric organogelator. Soft Matter 2015; 11:8333-8341. [PMID: 26350644 DOI: 10.1039/c5sm01684c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The effect of the replacement of molecular moieties (carbamates vs. urea) that drive self-assembly for two organogelators with an identical C(2) symmetric molecular structure is described. The main properties of the gels obtained from the urea-based organogelators are also discussed. The proposed organogelators are chiral molecules and are able to express chirality also at the supramolecular level, thus allowing the employment of electronic circular dichroism to gain insight into the molecular-scale structure of fibrillar aggregates. With the same technique, the behavior of enantiomeric mixtures of the urea-based organogelators was investigated, revealing the occurrence of different self-sorting phenomena at the molecular and supramolecular scale. The urea-based organogelators demonstrated to be more efficient gelators with respect to the carbamate-based analogues, showing a high gel-to-sol transition temperature (up to 66 °C) and a very low minimum gelling concentration (0.85 mg mL(-1)). This study is a starting point for a deeper investigation of structure/property relationships and, taking into account the peculiar behavior detected for the enantiomeric mixtures, also of self-sorting and molecular recognition phenomena.
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Affiliation(s)
- Luisa Lascialfari
- "Ugo Schiff" Chemistry Department, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy and INSTM Consortium, UdR Firenze, Via G. Giusti 9, 50121, Firenze, Italy
| | - Gennaro Pescitelli
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via Moruzzi 13, 56124 Pisa, Italy
| | - Alberto Brandi
- "Ugo Schiff" Chemistry Department, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy and INSTM Consortium, UdR Firenze, Via G. Giusti 9, 50121, Firenze, Italy
| | - Matteo Mannini
- "Ugo Schiff" Chemistry Department, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy and INSTM Consortium, UdR Firenze, Via G. Giusti 9, 50121, Firenze, Italy
| | - Debora Berti
- "Ugo Schiff" Chemistry Department, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy and CSGI Consortium, UdR Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Stefano Cicchi
- "Ugo Schiff" Chemistry Department, University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Italy and INSTM Consortium, UdR Firenze, Via G. Giusti 9, 50121, Firenze, Italy
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Bertani F, Cristiani N, Mannini M, Pinalli R, Sessoli R, Dalcanale E. Iodinated Bis(phthalocyaninato)terbium(III) Complexes: Versatile Platforms for Functionalization of Single-Molecule Magnets through Sonogashira Reaction. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Oberhauser W, Evangelisti C, Jumde RP, Petrucci G, Bartoli M, Frediani M, Mannini M, Capozzoli L, Passaglia E, Rosi L. Palladium-nanoparticles on end-functionalized poly(lactic acid)-based stereocomplexes for the chemoselective cinnamaldehyde hydrogenation: Effect of the end-group. J Catal 2015. [DOI: 10.1016/j.jcat.2015.07.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Catalano MR, Cucinotta G, Schilirò E, Mannini M, Caneschi A, Lo Nigro R, Smecca E, Condorelli GG, Malandrino G. Metal-Organic Chemical Vapor Deposition (MOCVD) Synthesis of Heteroepitaxial Pr0.7Ca0.3MnO3 Films: Effects of Processing Conditions on Structural/Morphological and Functional Properties. ChemistryOpen 2015; 4:523-32. [PMID: 26478849 PMCID: PMC4603415 DOI: 10.1002/open.201500038] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Indexed: 11/15/2022] Open
Abstract
Calcium-doped praseodymium manganite films (Pr0.7Ca0.3MnO3, PCMO) were prepared by metal-organic chemical vapor deposition (MOCVD) on SrTiO3 (001) and SrTiO3 (110) single-crystal substrates. Structural characterization through X-ray diffraction (XRD) measurements and transmission electron microscopy (TEM) analyses confirmed the formation of epitaxial PCMO phase films. Energy dispersive X-ray (EDX) and X-ray photoelectron spectroscopy (XPS) characterization was used to confirm lateral and vertical composition and the purity of the deposited films. Magnetic measurements, obtained in zero-field-cooling (ZFC) and field-cooling (FC) modes, provided evidence of the presence of a ferromagnetic (FM) transition temperature, which was correlated to the transport properties of the film. The functional properties of the deposited films, combined with the structural and chemical characterization collected data, indicate that the MOCVD approach represents a suitable route for the growth of pure, good quality PCMO for the fabrication of novel spintronic devices.
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Affiliation(s)
- Maria R Catalano
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, INSTM UdR di Catania 95125, Catania, Italy
| | - Giuseppe Cucinotta
- Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze, INSTM UdR di Firenze Via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy
| | - Emanuela Schilirò
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, INSTM UdR di Catania 95125, Catania, Italy
| | - Matteo Mannini
- Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze, INSTM UdR di Firenze Via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy
| | - Andrea Caneschi
- Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze, INSTM UdR di Firenze Via della Lastruccia 3, 50019, Sesto Fiorentino (FI), Italy
| | - Raffaella Lo Nigro
- Istituto per la Microelettronica e Microsistemi, Institute for Microelectronics and Microsystems, National Research Council (IMM-CNR) Strada VIII n. 5, 95121, Catania, Italy
| | - Emanuele Smecca
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, INSTM UdR di Catania 95125, Catania, Italy
| | - Guglielmo G Condorelli
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, INSTM UdR di Catania 95125, Catania, Italy
| | - Graziella Malandrino
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, INSTM UdR di Catania 95125, Catania, Italy
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Poneti G, Poggini L, Mannini M, Cortigiani B, Sorace L, Otero E, Sainctavit P, Magnani A, Sessoli R, Dei A. Thermal and optical control of electronic states in a single layer of switchable paramagnetic molecules. Chem Sci 2015; 6:2268-2274. [PMID: 29308140 PMCID: PMC5645729 DOI: 10.1039/c5sc00163c] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 02/12/2015] [Indexed: 11/21/2022] Open
Abstract
The control of the charge distribution in a monolayer of switchable cobalt-dioxolene complexes undergoing Valence Tautomerism (VT) has been achieved by means of thermal and optical stimuli. Thiol-derivatised VT molecules have been grafted on polycrystalline gold surface as monolayers from solution. X-ray photoelectron spectroscopy and time-of-flight secondary ions mass spectrometry evidenced the formation of a covalent bond between intact VT molecules and the surface and excluded the presence of physisorbed molecules. X-ray absorption spectroscopy revealed that the temperature- and light-induced conversion profiles of the monolayer closely reproduce the ones found for the crystalline phase. This study demonstrates that a wet chemistry based approach allows to transfer switchable paramagnetic molecules at the nanoscale, widening the playground to develop new hybrid molecular based architectures for novel technologies.
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Affiliation(s)
- Giordano Poneti
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
- "Guglielmo Marconi" University , Department of Applied Science and Technology , via Plinio 44 , 00193 Roma , Italy
| | - Lorenzo Poggini
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Matteo Mannini
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Brunetto Cortigiani
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Lorenzo Sorace
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Edwige Otero
- Synchrotron SOLEIL , BP 48 91192 Gif-Sur-Yvette , France
| | - Philippe Sainctavit
- Institut de Minéralogie , de Physique des Matériaux et de Cosmochimie , UMR7590 CNRS , Université Pierre et Marie Curie (Paris 6) , 4 place Jussieu , 75252 Paris , France
| | - Agnese Magnani
- University of Siena , Department of Biotechnologies , Chemistry and Pharmacy , INSTM Research Unit of Siena , Via A. Moro 2 , 53100 Siena , Italy
| | - Roberta Sessoli
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Andrea Dei
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
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Malavolti L, Lanzilotto V, Ninova S, Poggini L, Cimatti I, Cortigiani B, Margheriti L, Chiappe D, Otero E, Sainctavit P, Totti F, Cornia A, Mannini M, Sessoli R. Magnetic bistability in a submonolayer of sublimated Fe4 single-molecule magnets. Nano Lett 2015; 15:535-541. [PMID: 25489967 DOI: 10.1021/nl503925h] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We demonstrate that Fe4 molecules can be deposited on gold by thermal sublimation in ultra-high vacuum with retention of single molecule magnet behavior. A magnetic hysteresis comparable to that found in bulk samples is indeed observed when a submonolayer film is studied by X-ray magnetic circular dichroism. Scanning tunneling microscopy evidences that Fe4 molecules are assembled in a two-dimensional lattice with short-range hexagonal order and coexist with a smaller contaminant. The presence of intact Fe4 molecules and the retention of their bistable magnetic behavior on the gold surface are supported by density functional theory calculations.
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Affiliation(s)
- Luigi Malavolti
- Department of Chemistry "Ugo Schiff" and INSTM Research Unit, University of Florence , 50019 Sesto Fiorentino, Italy
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Rescignano N, González-Alfaro Y, Fantechi E, Mannini M, Innocenti C, Ruiz-Hitzky E, Kenny J, Armentano I. Design, development and characterization of a nanomagnetic system based on iron oxide nanoparticles encapsulated in PLLA-nanospheres. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2014.11.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sessoli R, Boulon ME, Caneschi A, Mannini M, Poggini L, Wilhelm F, Rogalev A. Strong magneto-chiral dichroism in a paramagnetic molecular helix observed by hard X-ray. Nat Phys 2015; 11:69-74. [PMID: 25729401 PMCID: PMC4340522 DOI: 10.1038/nphys3152] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Magneto-chiral dichroism (MχD) is a non-reciprocal, i. e. directional, effect observed in magnetised chiral systems featuring an unbalanced absorption of unpolarised light depending on the direction of the magnetisation. Despite the fundamental interest in a phenomenon breaking both parity and time reversal symmetries, MχD is one of the least investigated aspects of light-matter interaction because of the weakness of the effect in most reported experiments. Here we have exploited the element selectivity of hard X-ray radiation to investigate the magneto-chiral properties of enentiopure crsytals of two isostructural molecular helicoidal chains comprising Cobalt(II) and Manganese (II) ions, respectively. A strong magneto-chiral dichroism, with Kuhn asymmetry of the order of a few percent, has been observed in the Cobalt chain system, while it is practically absent for the Manganese derivative. The spectral features of the XMχD signal differ significantly from the natural and magnetic dichroic contributions and have been here rationalized using the simple multipolar expansion of matter-radiation interaction.
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Affiliation(s)
- Roberta Sessoli
- Department of Chemistry 'Ugo Schiff' and INSTM research unit, University of Florence, 50019 Sesto Fiorentino, Italy
| | - Marie-Emmanuelle Boulon
- Department of Chemistry 'Ugo Schiff' and INSTM research unit, University of Florence, 50019 Sesto Fiorentino, Italy
| | - Andrea Caneschi
- Department of Chemistry 'Ugo Schiff' and INSTM research unit, University of Florence, 50019 Sesto Fiorentino, Italy
| | - Matteo Mannini
- Department of Chemistry 'Ugo Schiff' and INSTM research unit, University of Florence, 50019 Sesto Fiorentino, Italy
| | - Lorenzo Poggini
- Department of Chemistry 'Ugo Schiff' and INSTM research unit, University of Florence, 50019 Sesto Fiorentino, Italy
| | - Fabrice Wilhelm
- European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France
| | - Andrei Rogalev
- European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France
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Cimatti I, Ninova S, Lanzilotto V, Malavolti L, Rigamonti L, Cortigiani B, Mannini M, Magnano E, Bondino F, Totti F, Cornia A, Sessoli R. UHV deposition and characterization of a mononuclear iron(III) β-diketonate complex on Au(111). Beilstein J Nanotechnol 2014; 5:2139-48. [PMID: 25551042 PMCID: PMC4273306 DOI: 10.3762/bjnano.5.223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 10/23/2014] [Indexed: 06/04/2023]
Abstract
The adsorption of the sterically hindered β-diketonate complex Fe(dpm)3, where Hdpm = dipivaloylmethane, on Au(111) was investigated by ultraviolet photoelectron spectroscopy (UPS) and scanning tunnelling microscopy (STM). The high volatility of the molecule limited the growth of the film to a few monolayers. While UPS evidenced the presence of the β-diketonate ligands on the surface, the integrity of the molecule on the surface could not be assessed. The low temperature STM images were more informative and at submonolayer coverage they showed the presence of regular domains characterized by a flat morphology and height of ≈0.3 nm. Along with these domains, tetra-lobed features adsorbed on the kinks of the herringbone were also observed. DFT-simulated images of the pristine molecule and its possible decomposition products allowed to assess the partial fragmentation of Fe(dpm)3 upon adsorption on the Au(111) surface. Structural features with intact molecules were only observed for the saturation coverage. An ex situ prepared thick film of the complex was also investigated by X-ray magnetic circular dichroism (XMCD) and features typical of high-spin iron(III) in octahedral environment were observed.
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Affiliation(s)
- Irene Cimatti
- Laboratory of Molecular Magnetism, Department of Chemistry "Ugo Schiff", University of Florence & INSTM RU of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Silviya Ninova
- Laboratory of Molecular Magnetism, Department of Chemistry "Ugo Schiff", University of Florence & INSTM RU of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Valeria Lanzilotto
- Laboratory of Molecular Magnetism, Department of Chemistry "Ugo Schiff", University of Florence & INSTM RU of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Luigi Malavolti
- Laboratory of Molecular Magnetism, Department of Chemistry "Ugo Schiff", University of Florence & INSTM RU of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Luca Rigamonti
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia & INSTM RU of Modena and Reggio Emilia, Via G. Campi 183, 41125 Modena, Italy
| | - Brunetto Cortigiani
- Laboratory of Molecular Magnetism, Department of Chemistry "Ugo Schiff", University of Florence & INSTM RU of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Matteo Mannini
- Laboratory of Molecular Magnetism, Department of Chemistry "Ugo Schiff", University of Florence & INSTM RU of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Elena Magnano
- CNR-IOM, Laboratorio TASC, Basovizza SS-14, Km 163.5, 34149 Trieste, Italy
| | - Federica Bondino
- CNR-IOM, Laboratorio TASC, Basovizza SS-14, Km 163.5, 34149 Trieste, Italy
| | - Federico Totti
- Laboratory of Molecular Magnetism, Department of Chemistry "Ugo Schiff", University of Florence & INSTM RU of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Andrea Cornia
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia & INSTM RU of Modena and Reggio Emilia, Via G. Campi 183, 41125 Modena, Italy
| | - Roberta Sessoli
- Laboratory of Molecular Magnetism, Department of Chemistry "Ugo Schiff", University of Florence & INSTM RU of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
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Mannini M, Bertani F, Tudisco C, Malavolti L, Poggini L, Misztal K, Menozzi D, Motta A, Otero E, Ohresser P, Sainctavit P, Condorelli GG, Dalcanale E, Sessoli R. Magnetic behaviour of TbPc2 single-molecule magnets chemically grafted on silicon surface. Nat Commun 2014; 5:4582. [PMID: 25109254 PMCID: PMC4129938 DOI: 10.1038/ncomms5582] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 07/02/2014] [Indexed: 12/26/2022] Open
Abstract
Single-molecule magnets (SMMs) are among the most promising molecular systems for the development of novel molecular electronics based on the spin transport. Going beyond the investigations focused on physisorbed SMMs, in this work the robust grafting of Terbium(III) bis(phthalocyaninato) complexes to silicon surface from a diluted solution is achieved by rational chemical design yielding the formation of a partially oriented monolayer on the conducting substrate. Here, by exploiting the surface sensitivity of X-ray circular magnetic dichroism we evidence an enhancement of the magnetic bistability of this single-molecule magnet, in contrast to the dramatic reduction of the magnetic hysteresis that characterises monolayer deposits evaporated on noble and ferromagnetic metals. Photoelectron spectroscopy investigations and density functional theory analysis suggest a non-innocent role played by the silicon substrate, evidencing the potentiality of this approach for robust integration of bistable magnetic molecules in electronic devices.
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Affiliation(s)
- Matteo Mannini
- Department of Chemistry 'Ugo Schiff' and INSTM RU, University of Firenze, via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Federico Bertani
- Department of Chemistry, University of Parma and INSTM RU, Parco Area delle Scienze 17/A, Parma 43124, Italy
| | - Cristina Tudisco
- Department of Chemical Science, University of Catania and INSTM RU, Viale Andrea Doria, 6, Catania 95125, Italy
| | - Luigi Malavolti
- Department of Chemistry 'Ugo Schiff' and INSTM RU, University of Firenze, via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Lorenzo Poggini
- Department of Chemistry 'Ugo Schiff' and INSTM RU, University of Firenze, via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
| | - Kasjan Misztal
- Department of Chemistry, University of Parma and INSTM RU, Parco Area delle Scienze 17/A, Parma 43124, Italy
| | - Daniela Menozzi
- Department of Chemistry, University of Parma and INSTM RU, Parco Area delle Scienze 17/A, Parma 43124, Italy
| | - Alessandro Motta
- Department of Chemical Science, University of Catania and INSTM RU, Viale Andrea Doria, 6, Catania 95125, Italy
| | - Edwige Otero
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin-BP 48, Gif-sur-Yvette 91192, France
| | - Philippe Ohresser
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin-BP 48, Gif-sur-Yvette 91192, France
| | - Philippe Sainctavit
- 1] Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin-BP 48, Gif-sur-Yvette 91192, France [2] IMPMC-CNRS, Université Pierre et Marie Curie, 4 place Jussieu 75252 Paris 05, France
| | - Guglielmo G Condorelli
- Department of Chemical Science, University of Catania and INSTM RU, Viale Andrea Doria, 6, Catania 95125, Italy
| | - Enrico Dalcanale
- Department of Chemistry, University of Parma and INSTM RU, Parco Area delle Scienze 17/A, Parma 43124, Italy
| | - Roberta Sessoli
- Department of Chemistry 'Ugo Schiff' and INSTM RU, University of Firenze, via della Lastruccia 3-13, Sesto Fiorentino 50019, Italy
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Totaro P, Poggini L, Favre A, Mannini M, Sainctavit P, Cornia A, Magnani A, Sessoli R. Tetrairon(III) single-molecule magnet monolayers on gold: insights from ToF-SIMS and isotopic labeling. Langmuir 2014; 30:8645-8649. [PMID: 25000391 DOI: 10.1021/la500846a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
To work as magnetic components in molecular electronics and spintronics, single-molecule magnets (SMMs) must be reliably interfaced with metals. The organization on gold of a Fe4 SMM carrying two acetyl-protected thiol groups has been studied by exploiting the surface sensitivity of time-of-flight secondary ion mass spectrometry (ToF-SIMS), additionally powered by the use of an isotopic labeling strategy. Deposition from millimolar dichloromethane solutions results in a higher surface coverage and better packed monolayers as compared with previous protocols based on more diluted solutions. Fe4 complexes are chemically tethered to the surface via a single Au-S bond while they still contain an intact SAc group.
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Affiliation(s)
- Pasquale Totaro
- Laboratory of Molecular Magnetism (LaMM), Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze & INSTM RU of Firenze , via della Lastruccia 3-13, 50019 Sesto Fiorentino, Florence, Italy
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Lascialfari L, Berti D, Brandi A, Cicchi S, Mannini M, Pescitelli G, Procacci P. Chiral/ring closed vs. achiral/open chain triazine-based organogelators: induction and amplification of supramolecular chirality in organic gels. Soft Matter 2014; 10:3762-3770. [PMID: 24733431 DOI: 10.1039/c4sm00354c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The purpose of this study is to compare the gelling behavior of two molecules: a chiral compound and its achiral counterpart. The chiral partner is characterized by a rigid, chiral pyrrolidine nucleus, while the achiral one contains a flexible diethanolamine moiety. The chiral compound is an already known good organogelator, but also the achiral compound shows remarkable gelling properties. Very interestingly, a small fraction of the chiral compound induces chirality and strong CD effects in its aggregates with the achiral one. The observed chirality amplification corresponds to a peculiar sergeant-and-soldier effect. Molecular modelling and CD calculations suggested a model for the supramolecular assembly of hetero-aggregates that fits the experimental data.
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Affiliation(s)
- L Lascialfari
- Department of Chemistry, Università di Firenze, Via della lastruccia 3-13, 50019, Sesto Fiorentino-Fi, Italy.
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