1
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Subintoro PJ, Carter KP. Structural and vibrational properties of lanthanide Lindqvist polyoxometalate complexes. Dalton Trans 2024; 53:9526-9539. [PMID: 38768267 DOI: 10.1039/d4dt00786g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Molecular spin qubits have demonstrated immense potential in quantum information science research due to the addressability of electron spins using microwave frequencies, and the scalability and tunability of molecular systems. Exemplary in this regard is the holmium polyoxometalate, [Na9Ho(W5O18)2]·35H2O (HoW10), which features an accessible atomic clock transition at 9.4 GHz; however, the coherence time of this molecule is limited by spin-phonon coupling driven decoherence processes. To limit these decoherence pathways, materials need to be designed to reduce energy overlap between spin and phonon states, and this necessitates developing a better understanding on how structural modifications impact the vibrational landscape for classes of complexes. Herein we conducted a full investigation into the fundamental structural and vibrational properties of the lanthanide Lindqvist polyoxometalate series, [Na9Ln(W5O18)2]·xH2O (Ln = La(III)-Lu(III), except Pm(III)) (LnW10), to assess how structural changes effect vibrational characteristics and to elucidate pathways to improve the coherence properties of HoW10. Single crystal X-ray diffraction results revealed four distinct structural polymorphs in complexes 1-14 wherein first coordination spheres were identical, and differences manifested as changes in lattice packing. Interestingly, the subtle changes in packing exhibited by the four polymorphs were found to impact distortions away from ideal D4d symmetry for each of the LnW10 complexes. Raman and far-infrared (FIR) spectra of complexes 1-14 were collected to identify vibrational modes present in low energy regions and peak fitting assignments were made according to literature precedents. Qualitative and Partial least squares (PLS) analysis show correlations between complex structural parameters with the low energy Raman and FIR vibrational modes of interest. Overall, this investigation shows that the second coordination sphere plays an integral role in modulation of the structural and vibrational characteristics of LnW10 complexes, which makes it a viable route for tuning spin and vibrational manifolds of species within this series.
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Affiliation(s)
| | - Korey P Carter
- Department of Chemistry, University of Iowa, Iowa City, IA 52242, USA.
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2
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Zhao Y, Li K, Du J, Chen CQ, Chen S, Yang P. Binary Heterogroup-Templated Scaffolds of Polyoxopalladates as Precatalysts for Plasma-Assisted Ammonia Synthesis. ACS APPLIED MATERIALS & INTERFACES 2023; 15:43899-43908. [PMID: 37690052 DOI: 10.1021/acsami.3c09698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
In addition to improving the synthetic efficiency, the template method can do a lot more in the chemistry of polyoxopalladates (POPs), such as the establishment of novel metal-oxo scaffolds. In this endeavor, a binary system comprising heterogroups of nonmetallic {As/SiO4} and metallic {VO4/5} successfully fulfills the templated growth of two POPs with unprecedented seesaw- and spindle-like prototypes. Of these, self-aggregation of heterogroups beacons an effective route to break the highly symmetrical PdII-oxo matrix and to force the arrangement of addenda in a nonconventional manner. Aside from the interest in their structural features, the as-made POPs are available for immobilization on the mesoporous SBA-15 as precatalysts for ammonia synthesis. The outer cover of heterogroups in the POP precursors contributes to the ultrafine size and uniform distribution of derived Pd0 nanoparticles (PdNPs). With the help of plasma activation on H2 and N2, such PdNPs-SBA15 catalysts significantly improve the production performance of NH3, showcasing the maximum synthesis rate of 64.42 μmol/(min·gcat) with the corresponding energy yield as high as 4.38 g-NH3/kWh.
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Affiliation(s)
- Yue Zhao
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha 410082, P. R. China
| | - Kelin Li
- College of Electrical and Information Engineering, Hunan University, Changsha 410082, P. R. China
| | - Jing Du
- College of Chemistry and Materials Science, Testing and Analysis Center, Hebei Normal University, Shijiazhuang 050024, P. R. China
| | - Chao-Qin Chen
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha 410082, P. R. China
| | - She Chen
- College of Electrical and Information Engineering, Hunan University, Changsha 410082, P. R. China
| | - Peng Yang
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha 410082, P. R. China
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3
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Yang P, Mahmoud ME, Xiang Y, Lin Z, Ma X, Christian JH, Bindra JK, Kinyon JS, Zhao Y, Chen C, Nisar T, Wagner V, Dalal NS, Kortz U. Host–Guest Chemistry in Discrete Polyoxo-12-Palladate(II) Cubes [MO 8Pd 12L 8] n− (M = Sc III, Co II, Cu II, L = AsO 43 –; M = Cd II, Hg II, L = PhAsO 32–): Structure, Magnetism, and Catalytic Hydrogenation. Inorg Chem 2022; 61:18524-18535. [DOI: 10.1021/acs.inorgchem.2c02751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Peng Yang
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, 410082 Changsha, P. R. China
| | | | - Yixian Xiang
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
| | - Zhengguo Lin
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
- College of Chemistry and Materials Science, Hebei Normal University, 050024 Shijiazhuang, P. R. China
| | - Xiang Ma
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
| | - Jonathan H. Christian
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Jasleen K. Bindra
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Jared S. Kinyon
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Yue Zhao
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, 410082 Changsha, P. R. China
| | - Chaoqin Chen
- College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, 410082 Changsha, P. R. China
| | - Talha Nisar
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
| | - Veit Wagner
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
| | - Naresh S. Dalal
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Ulrich Kortz
- School of Science, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
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4
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Iftikhar T, Izarova NV, van Leusen J, Kögerler P. Trigonal Prismatic Coordination of Discrete Rare Earth Ions, Enforced by the Polyoxotungstate [P 4 W 27 O 99 (H 2 O)] 16. Chemistry 2021; 27:13376-13383. [PMID: 34259354 PMCID: PMC8518533 DOI: 10.1002/chem.202101474] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Indexed: 12/03/2022]
Abstract
A family of solution‐stable polyanions [Na⊂{LnIII(H2O)}{WVIO(H2O)}PV4WVI26O98]12− (Ln=Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y) represent the first examples of polyoxometalates comprising a single lanthanide(III) or yttrium(III) ion in a rare trigonal prismatic O6 environment. Their synthesis exploits the reactivity of the organophosphonate‐functionalized precursor [P4W24O92(C6H5PVO)2]16− with heterometal ions and yields hydrated potassium or mixed lithium/potassium salts of composition KxLnyH12–x–y[Na⊂{Ln(H2O)}{WO(H2O)}P4W26O98]⋅nH2O⋅mLiCl (x=8.5–11; y=0–2; n=24–34; m=0–1.5). The Dy, Ho, Er and Yb derivatives are characterized by slow magnetization relaxation.
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Affiliation(s)
- Tuba Iftikhar
- Institute of Inorganic Chemistry, RWTH Aachen University, D-52074, Aachen, Germany.,Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute 6, Forschungszentrum Jülich, D-52425, Jülich, Germany
| | - Natalya V Izarova
- Institute of Inorganic Chemistry, RWTH Aachen University, D-52074, Aachen, Germany.,Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute 6, Forschungszentrum Jülich, D-52425, Jülich, Germany
| | - Jan van Leusen
- Institute of Inorganic Chemistry, RWTH Aachen University, D-52074, Aachen, Germany
| | - Paul Kögerler
- Institute of Inorganic Chemistry, RWTH Aachen University, D-52074, Aachen, Germany.,Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute 6, Forschungszentrum Jülich, D-52425, Jülich, Germany
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5
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Aravena D, Ruiz E. Spin dynamics in single-molecule magnets and molecular qubits. Dalton Trans 2020; 49:9916-9928. [PMID: 32589181 DOI: 10.1039/d0dt01414a] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Over recent decades, much effort has been made to lengthen spin relaxation/decoherence times of single-molecule magnets and molecular qubits by following different chemical design rules such as maximizing the total spin value, controlling symmetry, enhancing the ligand field or inhibiting key vibrational modes. Simultaneously, electronic structure calculations have been employed to provide an understanding of the processes involved in the spin dynamics of molecular systems and served to refine or introduce new design rules. This review focuses on contemporary theoretical approaches focused on the calculation of spin relaxation/decoherence times, highlighting their main features and scope. Fundamental aspects of experimental techniques for the determination of key Single Molecule Magnet/Spin Qubit properties are also reviewed.
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Affiliation(s)
- Daniel Aravena
- Departamento de Química de los Materiales, Universidad de Santiago de Chile, Santiago 9170022, Chile
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6
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Giménez-Santamarina S, Cardona-Serra S, Clemente-Juan JM, Gaita-Ariño A, Coronado E. Exploiting clock transitions for the chemical design of resilient molecular spin qubits. Chem Sci 2020; 11:10718-10728. [PMID: 34094324 PMCID: PMC8162297 DOI: 10.1039/d0sc01187h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Molecular spin qubits are chemical nanoobjects with promising applications that are so far hampered by the rapid loss of quantum information, a process known as decoherence. A strategy to improve this situation involves employing so-called Clock Transitions (CTs), which arise at anticrossings between spin energy levels. At CTs, the spin states are protected from magnetic noise and present an enhanced quantum coherence. Unfortunately, these optimal points are intrinsically hard to control since their transition energy cannot be tuned by an external magnetic field; moreover, their resilience towards geometric distortions has not yet been analyzed. Here we employ a python-based computational tool for the systematic theoretical analysis and chemical optimization of CTs. We compare three relevant case studies with increasingly complex ground states. First, we start with vanadium(iv)-based spin qubits, where the avoided crossings are controlled by hyperfine interaction and find that these S = 1/2 systems are very promising, in particular in the case of vanadyl complexes in an L-band pulsed EPR setup. Second, we proceed with a study of the effect of symmetry distortions in a holmium polyoxotungstate of formula [Ho(W5O18)2]9- where CTs had already been experimentally demonstrated. Here we determine the relative importance of the different structural distortions that causes the anticrossings. Third, we study the most complicated case, a polyoxopalladate cube [HoPd12(AsPh)8O32]5- which presents an unusually rich ground spin multiplet. This system allows us to find uniquely favorable CTs that could nevertheless be accessible with standard pulsed EPR equipment (X-band or Q-band) after a suitable chemical distortion to break the perfect cubic symmetry. Since anticrossings and CTs constitute a rich source of physical phenomena in very different kinds of quantum systems, the generalization of this study is expected to have impact not only in molecular spin science but also in other related fields such as molecular photophysics and photochemistry.
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Affiliation(s)
| | - Salvador Cardona-Serra
- ICMol, Universitat de València C/Catedrático José Beltrán no 2 46980 Paterna Valencia Spain
| | - Juan M Clemente-Juan
- ICMol, Universitat de València C/Catedrático José Beltrán no 2 46980 Paterna Valencia Spain
| | - Alejandro Gaita-Ariño
- ICMol, Universitat de València C/Catedrático José Beltrán no 2 46980 Paterna Valencia Spain
| | - Eugenio Coronado
- ICMol, Universitat de València C/Catedrático José Beltrán no 2 46980 Paterna Valencia Spain
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7
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Salinas-Uber J, Barrios LA, Roubeau O, Aromí G. Two [Ln 4] molecular rings folded as compact tetrahedra. Dalton Trans 2020; 49:7182-7188. [DOI: 10.1039/d0dt01259a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A new highly photo-switchable ligand furnishes supramolecular tetrahedral nanomagnets with Ln(iii) ions (Ln = Dy, Tb). Intramolecular weak interactions define the conformation of the ligand, quenching the photochromic activity.
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Affiliation(s)
- Jorge Salinas-Uber
- Departament de Química Inorgànica i Orgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Leoní A. Barrios
- Departament de Química Inorgànica i Orgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
- Institut of Nanoscience and Nanotechnology of the University of Barcelona (IN2UB)
| | - Olivier Roubeau
- Instituto de Ciencia de Materiales de Aragón (ICMA)
- CSIC and Universidad de Zaragoza
- Zaragoza
- Spain
| | - Guillem Aromí
- Departament de Química Inorgànica i Orgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
- Institut of Nanoscience and Nanotechnology of the University of Barcelona (IN2UB)
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8
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Ma T, Yang P, Parris JM, Csupász T, Li MX, Bányai I, Tóth I, Lin Z, Kortz U. Indium in Polyoxopalladate(II) Chemistry: Synthesis of All-Acetate-Capped [InPd 12O 8(OAc) 16] 5- and Controlled Transformation to Phosphate-Capped Double-Cube and Monocube. Inorg Chem 2019; 58:15864-15871. [PMID: 31725279 DOI: 10.1021/acs.inorgchem.9b02282] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have prepared the indium(III)-centered, all-acetate-capped polyoxopalladate(II) nanocube [InPd12O8(OAc)16]5- (InPd12Ac16), which can be further used as precursor to form the phosphate-capped (i) double-cube [In2Pd23O17(OH)(PO4)12(PO3OH)]21- (In2Pd23P13) and (ii) monocube [InPd12O8(PO4)8]13- (InPd12P8). All three novel polyoxopalladates (POPs) were synthesized using conventional one-pot techniques in aqueous solution and characterized in the solid state (single-crystal XRD, IR, elemental analysis), in solution (115In, 31P, and 13C NMR), and in the gas phase (ESI-MS).
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Affiliation(s)
- Tian Ma
- Department of Life Sciences and Chemistry , Jacobs University , Campus Ring 1 , 28759 Bremen , Germany
| | - Peng Yang
- Department of Life Sciences and Chemistry , Jacobs University , Campus Ring 1 , 28759 Bremen , Germany
| | - Jaclyn M Parris
- Department of Life Sciences and Chemistry , Jacobs University , Campus Ring 1 , 28759 Bremen , Germany
| | - Tibor Csupász
- Department of Inorganic and Analytical Chemistry and Department of Physical Chemistry , University of Debrecen , Egyetem tér 1 , 4032 Debrecen , Hungary
| | - Ming-Xing Li
- Department of Chemistry, College of Sciences , Shanghai University , Shanghai 200444 , P.R. China
| | - István Bányai
- Department of Inorganic and Analytical Chemistry and Department of Physical Chemistry , University of Debrecen , Egyetem tér 1 , 4032 Debrecen , Hungary
| | - Imre Tóth
- Department of Inorganic and Analytical Chemistry and Department of Physical Chemistry , University of Debrecen , Egyetem tér 1 , 4032 Debrecen , Hungary
| | - Zhengguo Lin
- Key Laboratory of Cluster Science, Ministry of Education of China, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , P.R. China
| | - Ulrich Kortz
- Department of Life Sciences and Chemistry , Jacobs University , Campus Ring 1 , 28759 Bremen , Germany
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9
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Velasco V, Barrios LA, Schütze M, Roubeau O, Luis F, Teat SJ, Aguilà D, Aromí G. Controlled Heterometallic Composition in Linear Trinuclear [LnCeLn] Lanthanide Molecular Assemblies. Chemistry 2019; 25:15228-15232. [DOI: 10.1002/chem.201903829] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 09/08/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Verónica Velasco
- Departament de Química Inorgànica i Orgànica Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
- Institute of Nanoscience and Nanotechnology University of Barcelona (IN2UB) 08007 Barcelona Spain
| | - Leoní A. Barrios
- Departament de Química Inorgànica i Orgànica Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
- Institute of Nanoscience and Nanotechnology University of Barcelona (IN2UB) 08007 Barcelona Spain
| | - Mike Schütze
- Departament de Química Inorgànica i Orgànica Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
| | - Olivier Roubeau
- Instituto de Ciencia de Materiales de Aragón (ICMA) CSIC and Universidad de Zaragoza Plaza San Francisco s/n 50009 Zaragoza Spain
| | - Fernando Luis
- Instituto de Ciencia de Materiales de Aragón (ICMA) CSIC and Universidad de Zaragoza Plaza San Francisco s/n 50009 Zaragoza Spain
| | - Simon J. Teat
- Advanced Light Source Berkeley Laboratory 1 Cyclotron Road Berkeley California 94720 USA
| | - David Aguilà
- Departament de Química Inorgànica i Orgànica Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
- Institute of Nanoscience and Nanotechnology University of Barcelona (IN2UB) 08007 Barcelona Spain
| | - Guillem Aromí
- Departament de Química Inorgànica i Orgànica Universitat de Barcelona Diagonal 645 08028 Barcelona Spain
- Institute of Nanoscience and Nanotechnology University of Barcelona (IN2UB) 08007 Barcelona Spain
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10
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Escalera-Moreno L, Baldoví JJ, Gaita-Ariño A, Coronado E. Exploring the High-Temperature Frontier in Molecular Nanomagnets: From Lanthanides to Actinides. Inorg Chem 2019; 58:11883-11892. [PMID: 31490061 DOI: 10.1021/acs.inorgchem.9b01610] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Molecular nanomagnets based on mononuclear metal complexes, also known as single-ion magnets (SIMs), are crossing challenging boundaries in molecular magnetism. From an experimental point of view, this class of magnetic molecules has expanded from lanthanoid complexes to both d-transition metal and actinoid complexes. From a theoretical point of view, more and more improved models have been developed, and we are now able not only to calculate the electronic structure of these systems on the basis of their molecular structures but also to unveil the role of vibrations in the magnetic relaxation processes, at least for lanthanoid and d-transition metal SIMs. This knowledge has allowed us to optimize the behavior of dysprosocenium-based SIMs until reaching magnetic hysteresis above liquid-nitrogen temperature. In this contribution, we offer a brief perspective of the progress of theoretical modeling in this field. We start by reviewing the developed methodologies to investigate the electronic structures of these systems and then move on focus to the open problem of understanding and optimizing the vibrationally induced spin relaxation, especially in uranium-based molecular nanomagnets. Finally, we discuss the differences in the design strategies for 4f and 5f SIMs, including an analysis of the metallocenium family.
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Affiliation(s)
- Luis Escalera-Moreno
- Instituto de Ciencia Molecular (ICMol) , Universidad de Valencia , C/Catedrático José Beltrán 2 , E-46980 Paterna , Spain
| | - José J Baldoví
- Max Planck Institute for the Structure and Dynamics of Matter , Luruper Chaussee 149 , D-22761 Hamburg , Germany
| | - Alejandro Gaita-Ariño
- Instituto de Ciencia Molecular (ICMol) , Universidad de Valencia , C/Catedrático José Beltrán 2 , E-46980 Paterna , Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol) , Universidad de Valencia , C/Catedrático José Beltrán 2 , E-46980 Paterna , Spain
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11
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Yang P, Ma T, Lang Z, Misirlic-Dencic S, Isakovic AM, Bényei A, Čolović MB, Markovic I, Krstić DZ, Poblet JM, Lin Z, Kortz U. Tetravalent Metal Ion Guests in Polyoxopalladate Chemistry: Synthesis and Anticancer Activity of [MO 8Pd 12(PO 4) 8] 12- (M = Sn IV, Pb IV). Inorg Chem 2019; 58:11294-11299. [PMID: 31411862 DOI: 10.1021/acs.inorgchem.9b01129] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first two examples of polyoxopalladates(II) (POPs) containing tetravalent metal ion guests, [MO8Pd12(PO4)8]12- (M = SnIV, PbIV), have been prepared and structurally characterized in the solid state, solution, and gas phase. The interactions of the metal ion guests and the palladium-oxo shell were studied by theoretical calculations. The POPs were shown to possess anticancer activity by causing oxidative stress inducing caspase activation and consecutive apoptosis of leukemic cells.
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Affiliation(s)
- Peng Yang
- Department of Life Sciences and Chemistry , Jacobs University , Campus Ring 1 , 28759 Bremen , Germany
| | - Tian Ma
- Department of Life Sciences and Chemistry , Jacobs University , Campus Ring 1 , 28759 Bremen , Germany
| | - Zhongling Lang
- Departament de Química Física i Inorgànica , Universitat Rovira i Virgili , c/Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | | | | | - Attila Bényei
- University of Debrecen , Department of Physical Chemistry , Egyetem tér 1 , 4032 Debrecen , Hungary
| | | | | | | | - Josep M Poblet
- Departament de Química Física i Inorgànica , Universitat Rovira i Virgili , c/Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | - Zhengguo Lin
- Department of Life Sciences and Chemistry , Jacobs University , Campus Ring 1 , 28759 Bremen , Germany.,Key Laboratory of Cluster Science, Ministry of Education of China, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , P.R. China
| | - Ulrich Kortz
- Department of Life Sciences and Chemistry , Jacobs University , Campus Ring 1 , 28759 Bremen , Germany
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12
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Stuckart M, Izarova NV, van Leusen J, Smekhova A, Schmitz-Antoniak C, Bamberger H, van Slageren J, Santiago-Schübel B, Kögerler P. Host-Guest-Induced Environment Tuning of 3d Ions in a Polyoxopalladate Matrix. Chemistry 2018; 24:17767-17778. [PMID: 30261127 DOI: 10.1002/chem.201803531] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 09/20/2018] [Indexed: 01/30/2023]
Abstract
A series of unprecedented supramolecular associates of phenylarsonate-capped {MII PdII 12 O8 }-type (M=Co, Ni and Zn) polyoxopalladates with α-cyclodextrins (α-CD) was obtained and characterized in the solid state (single-crystal X-ray diffraction (XRD), FT-IR spectroscopy, elemental and thermogravimetric (TGA) analyses), in aqueous solution (1 H and 13 C NMR) and in the gas phase (ESI-MS). The non-covalent host-guest interactions between the organopolyoxoanions and α-CD rings alter the O8 coordination environment of a 3d transition metal ion (MII ) situated at the center of a cuboid polyoxododecapalladate shell. This synthetically controlled "chemical pressure" effectively induces axial distortion of the otherwise cubic polyoxopalladate environment between two trans-positioned α-CD moieties. Its effect on the magnetic properties and the electronic structure of the CoII derivative was assessed in a combined SQUID magnetometry, EPR, X-ray magnetic circular/linear dichroism (XMCD/XMLD), and X-ray absorption near-edge structure (XANES) spectroscopy study.
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Affiliation(s)
- Maria Stuckart
- Institute of Inorganic Chemistry, RWTH Aachen University, 52074, Aachen, Germany.,Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute 6, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Natalya V Izarova
- Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute 6, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Jan van Leusen
- Institute of Inorganic Chemistry, RWTH Aachen University, 52074, Aachen, Germany
| | - Alevtina Smekhova
- Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute 6, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Carolin Schmitz-Antoniak
- Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute 6, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Heiko Bamberger
- Institute of Physical Chemistry, University of Stuttgart, 70569, Stuttgart, Germany
| | - Joris van Slageren
- Institute of Physical Chemistry, University of Stuttgart, 70569, Stuttgart, Germany
| | - Beatrix Santiago-Schübel
- Central Institute for Engineering, Electronics and Analytics 3, Research Centre Jülich, 52425, Jülich, Germany
| | - Paul Kögerler
- Institute of Inorganic Chemistry, RWTH Aachen University, 52074, Aachen, Germany.,Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute 6, Forschungszentrum Jülich, 52425, Jülich, Germany
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Exploring High-Symmetry Lanthanide-Functionalized Polyoxopalladates as Building Blocks for Quantum Computing. INORGANICS 2018. [DOI: 10.3390/inorganics6040101] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The structural, electronic, and magnetochemical properties of the star-shaped polyoxopalladate [Pd15O10(SeO3)10]10− (POPd) and its lanthanide-functionalized derivatives have been investigated on the basis of density functional theory, followed by a ligand field analysis using the Radial Effective Charge (REC) model. Our study predicts that heteroPOPd is a robust cryptand that enforces D5h symmetry around the encapsulated Ln3+ centers. This rigid coordination environment favors an interesting potential magnetic behavior in the Er and Ho derivatives, and the presence of a cavity in the structure suggests an effective insulation of the electronic system from the lattice phonons, which may be of interest for molecular spintronics and quantum computing applications.
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Abstract
Noble metal catalysts, in particular palladium-containing materials, are of prime commercial interest, because of their role as oxidation catalysts in automobile emission-control systems and reforming catalysts for the production of high-octane gasoline. However, despite almost two centuries of research, the precise structure of such materials is still ill-defined on the sub-nanometer scale, which severely limits the understanding of the underlying catalytic mechanisms. As a burgeoning class of structurally well-defined noble metal oxide nanoclusters, polyoxopalladates (POPs) have been highly rated as ideal models to fully decipher the molecular mechanism of noble metal-based catalysis. Being at the frontier of polyoxometalates (POMs), the chemistry of POPs, which are based exclusively on PdII centers as addenda is currently progressing rapidly, owing to their structural and compositional novelty, high solution stability, combined with promising applications especially as noble metal-based catalysts. Controlled hydrolysis-condensation processes of square-planar PdIIO4 units in the presence of external oxyacid heterogroups (e.g., AsO43-, PO43-, and SeO32-) drive the self-assembly of such discrete, polynuclear PdII-oxo nanoclusters in facile one-pot reactions using aqueous solvents. By now, more than 70 POPs have been discovered, encompassing a large structural variety, including cube, star, bowl, dumbbell, wheel, and open-shell archetypes. Moreover, the POP cages can serve as adaptable molecular containers for encapsulation/interaction with a range of metallic elements across the s, p, d, and f blocks of the periodic table, resulting in a library of host-guest assemblies of varying shapes and sizes. Besides a delicate balance of experimental variables, the fine-tuning of POP structure, composition, and properties is possible by systematic replacement of the metal ion guest and/or the capping heterogroups. Besides, nearly all POPs obtained so far could be perfectly rationalized by theoretical calculations, and even prediction of the design and synthesis of new POP structures is possible. The excellent stability of POPs in the solid state and in solution (both aqueous and organic media) and gas phase allows for applications mainly in homo- and heterogeneous catalysis or as molecular precursors for monodisperse nanoparticles via an ingenious bottom-up route for functional nanotechnology. Apart from catalysis, owing to the unique structural features of POPs, other areas of interest exist, for example, in magnetism as molecular spin qubits and in biology as aqueous-phase macromolecular models. Overall, as a distinct subclass of POMs, POPs not only integrate the advantages of tunable shape, size, composition, solution stability, redox activity, and facile synthetic procedures, but drive immense potential for achieving an atom-to-atom fabrication and modulation of nanostructures as well, thereby providing models for unveiling mechanistic insight of noble metal-based catalysis at the molecular level, which will, in turn, guide the programmed assembly of nanomaterials with improved performance in a controllable manner. This Account is directed to cover the main structural types of POPs and to discuss the structure-directing template effects induced by the guest ions on the resultant host-guest assemblies.
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Affiliation(s)
- Peng Yang
- Department of Life Sciences and Chemistry, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
| | - Ulrich Kortz
- Department of Life Sciences and Chemistry, Jacobs University, Campus Ring 1, 28759 Bremen, Germany
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Aguilà D, Velasco V, Barrios LA, González-Fabra J, Bo C, Teat SJ, Roubeau O, Aromí G. Selective Lanthanide Distribution within a Comprehensive Series of Heterometallic [LnPr] Complexes. Inorg Chem 2018; 57:8429-8439. [PMID: 29969253 DOI: 10.1021/acs.inorgchem.8b01112] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The preparation of heterometallic, lanthanide-only complexes is an extremely difficult synthetic challenge. By a ligand-based strategy, a complete isostructural series of dinuclear heterometallic [LnPr] complexes has been synthesized and structurally characterized. The two different coordination sites featured in this molecular entity allow study of the preferences of the praseodymium ion for a specific position depending on the ionic radii of the accompanying lanthanide partner. The purity of each heterometallic moiety has been evaluated in the solid state and in solution by means of crystallographic and spectrometric methods, respectively, revealing the limits of this strategy for ions with similar sizes. DFT calculations have been carried out to support the experimental results, confirming the nature of the site-selective lanthanide distribution. The predictable selectivity of this system has been exploited to assess the magnetic properties of the [DyPr] and [LuPr] derivatives, showing that the origin of the slow dynamics observed in the former arises from the dysprosium ion.
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Affiliation(s)
- David Aguilà
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica , Universitat de Barcelona , Diagonal 645 , 08028 Barcelona , Spain
| | - Verónica Velasco
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica , Universitat de Barcelona , Diagonal 645 , 08028 Barcelona , Spain
| | - Leoní A Barrios
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica , Universitat de Barcelona , Diagonal 645 , 08028 Barcelona , Spain
| | - Joan González-Fabra
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Carles Bo
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Física i Inorgànica , Universitat Rovira i Virgili , Marcel·lí Domingo s/n , 43007 Tarragona , Spain
| | - Simon J Teat
- Advanced Light Source, Berkeley Laboratory , 1 Cyclotron Road , Berkeley , California 94720 , United States
| | - Olivier Roubeau
- Instituto de Ciencia de Materiales de Aragón (ICMA) , CSIC and Universidad de Zaragoza , Plaza San Francisco s/n , 50009 , Zaragoza , Spain
| | - Guillem Aromí
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica , Universitat de Barcelona , Diagonal 645 , 08028 Barcelona , Spain
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McAdams SG, Ariciu AM, Kostopoulos AK, Walsh JP, Tuna F. Molecular single-ion magnets based on lanthanides and actinides: Design considerations and new advances in the context of quantum technologies. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.03.015] [Citation(s) in RCA: 222] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Lim KS, Baldoví JJ, Jiang S, Koo BH, Kang DW, Lee WR, Koh EK, Gaita-Ariño A, Coronado E, Slota M, Bogani L, Hong CS. Custom Coordination Environments for Lanthanoids: Tripodal Ligands Achieve Near-Perfect Octahedral Coordination for Two Dysprosium-Based Molecular Nanomagnets. Inorg Chem 2017; 56:4911-4917. [DOI: 10.1021/acs.inorgchem.6b03118] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kwang Soo Lim
- Department of Chemistry, Korea University, Seoul 136-713, Republic of Korea
| | - José J. Baldoví
- Instituto de Ciencia Molecular, Universidad de Valencia, C/Catedrático José Beltrán
2, Paterna E-46980, Spain
| | - ShangDa Jiang
- Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, U.K
- Inorganic Chemistry,
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Bong Ho Koo
- Department of Chemistry, Korea University, Seoul 136-713, Republic of Korea
| | - Dong Won Kang
- Department of Chemistry, Korea University, Seoul 136-713, Republic of Korea
| | - Woo Ram Lee
- Department of Chemistry, Korea University, Seoul 136-713, Republic of Korea
| | - Eui Kwan Koh
- Nano-Bio System Research Team, Korea Basic Science Institute, Seoul 136-713, Korea
| | - Alejandro Gaita-Ariño
- Instituto de Ciencia Molecular, Universidad de Valencia, C/Catedrático José Beltrán
2, Paterna E-46980, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular, Universidad de Valencia, C/Catedrático José Beltrán
2, Paterna E-46980, Spain
| | - Michael Slota
- Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, U.K
| | - Lapo Bogani
- Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, U.K
| | - Chang Seop Hong
- Department of Chemistry, Korea University, Seoul 136-713, Republic of Korea
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Baldoví J, Cardona-Serra S, Gaita-Ariño A, Coronado E. Design of Magnetic Polyoxometalates for Molecular Spintronics and as Spin Qubits. ADVANCES IN INORGANIC CHEMISTRY 2017. [DOI: 10.1016/bs.adioch.2016.12.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Cardona-Serra S, Escalera-Moreno L, Baldoví JJ, Gaita-Ariño A, Clemente-Juan JM, Coronado E. SIMPRE1.2: Considering the hyperfine and quadrupolar couplings and the nuclear spin bath decoherence. J Comput Chem 2016; 37:1238-44. [PMID: 26833799 DOI: 10.1002/jcc.24313] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 01/07/2016] [Indexed: 01/16/2023]
Abstract
SIMPRE is a fortran77 code which uses an effective electrostatic model of point charges to predict the magnetic behavior of rare-earth-based mononuclear complexes. In this article, we present SIMPRE1.2, which now takes into account two further phenomena. First, SIMPRE now considers the hyperfine and quadrupolar interactions within the rare-earth ion, resulting in a more complete and realistic set of energy levels and wave functions. Second, and to widen SIMPRE's predictive capabilities regarding potential molecular spin qubits, it now includes a routine that calculates an upper-bound estimate of the decoherence time considering only the dipolar coupling between the electron spin and the surrounding nuclear spin bath. Additionally, SIMPRE now allows the user to introduce the crystal field parameters manually. Thus, we are able to demonstrate the new features using as examples (i) a Gd-based mononuclear complex known for its properties both as a single ion magnet and as a coherent qubit and (ii) an Er-based mononuclear complex. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
| | - Luis Escalera-Moreno
- Instituto De Ciencia Molecular (ICMol) Universidad De Valencia, C/Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - José J Baldoví
- Instituto De Ciencia Molecular (ICMol) Universidad De Valencia, C/Catedrático José Beltrán 2, Paterna, 46980, Spain.,Institut De Chimie Moléculaire Et Des Matériaux D'orsay, CNRS, Université De Paris Sud 11, Orsay Cedex, 91405, France
| | - Alejandro Gaita-Ariño
- Instituto De Ciencia Molecular (ICMol) Universidad De Valencia, C/Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Juan M Clemente-Juan
- Instituto De Ciencia Molecular (ICMol) Universidad De Valencia, C/Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Eugenio Coronado
- Instituto De Ciencia Molecular (ICMol) Universidad De Valencia, C/Catedrático José Beltrán 2, Paterna, 46980, Spain
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Gaita-Ariño A, Prima-García H, Cardona-Serra S, Escalera-Moreno L, Rosaleny LE, Baldoví JJ. Coherence and organisation in lanthanoid complexes: from single ion magnets to spin qubits. Inorg Chem Front 2016. [DOI: 10.1039/c5qi00296f] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Molecular magnetism is reaching a degree of development that will allow for the rational design of sophisticated systems.
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Affiliation(s)
| | - Helena Prima-García
- Instituto de Ciencia Molecular (ICMol)
- Universidad de Valencia
- 46980 Paterna
- Spain
| | | | | | - Lorena E. Rosaleny
- Instituto de Ciencia Molecular (ICMol)
- Universidad de Valencia
- 46980 Paterna
- Spain
| | - José J. Baldoví
- Instituto de Ciencia Molecular (ICMol)
- Universidad de Valencia
- 46980 Paterna
- Spain
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
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