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Athanasopoulos E, Conradie J. DFT study of the spectroscopic behaviour of different iron(II)-terpyridine derivatives with application in DSSCs. J Mol Graph Model 2024; 129:108753. [PMID: 38461758 DOI: 10.1016/j.jmgm.2024.108753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 02/20/2024] [Accepted: 02/27/2024] [Indexed: 03/12/2024]
Abstract
Through a comprehensive computational analysis utilizing Density Functional Theory (DFT), we clarify the electronic structure and spectroscopic properties of modified iron(II)-terpyridine derivatives, with the aim of enhancing the efficiency of Dye-Sensitized Solar Cells (DSSCs). We optimized a series of nineteen iron(II)-terpyridine derivatives and related compounds in acetonitrile (MeCN) as the solvent using TDDFT, evaluating their potential as dyes for DSSCs. From the conducted computations on the optimized geometries of the nineteen [Fe(Ln)2]2+ complexes, containing substituted terpyridine and related ligands L1-L19, we determined the wavelengths (λ in nm), transition energy (E in eV), oscillator strength (f), type of transitions, excited state lifetime (τ), light harvesting efficiency (LHE), frontier orbital character and their energies (ELUMO/EHOMO), natural transition orbitals (NTOs), injection driving force of a dye (ΔGinject), and regeneration driving force of a dye (ΔGregenerate). Results show that the theoretically calculated values for assessing dye efficiency in a DSSC correlate with available experimental values. The UV-visible spectra of [Fe(Ln)2]2+ exhibited a peak above 500 nm (λmax) in the visible region, attributed to the ligand-to-metal charge transfer band (LMCT) in literature, and a significant absorbance peak at approximately 300 nm (λA,max) in the UV region. The M06-D3/CEP-121G method replicated all reported λmax and λA,max values with a mean absolute deviation (MAD) of 21 and 18 nm, respectively. Our findings underscore the connections between electronic modifications and absorption spectra, emphasizing their impact on the light-harvesting capabilities and overall performance of DSSCs. This research contributes to the advancement of fundamental principles governing the design and optimization of novel photovoltaic materials, facilitating the development of more efficient and sustainable solar energy technologies.
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Affiliation(s)
- Evangelia Athanasopoulos
- Department of Chemistry, University of the Free State, P.O. Box 339, Bloemfontein, 9300, South Africa
| | - Jeanet Conradie
- Department of Chemistry, University of the Free State, P.O. Box 339, Bloemfontein, 9300, South Africa.
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2
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Athanasopoulos E, Conradie MM, Conradie J. Experimental and theoretically calculated structural data of different iron(II)-terpyridine complexes - validation of theoretical method. Data Brief 2024; 54:110423. [PMID: 38690318 PMCID: PMC11058094 DOI: 10.1016/j.dib.2024.110423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 04/08/2024] [Accepted: 04/09/2024] [Indexed: 05/02/2024] Open
Abstract
Experimental structural data for bis(terpyridine)iron(II) and a series of related iron(II) complexes, featuring either substituted terpyridine or tris-azinyl analogues of terpyridine, are presented and analyzed in terms of the Mean Absolute Deviation (MAD) from the average experimental data for each specific complex. The experimental structural data are then juxtaposed with density functional theory (DFT) calculated data obtained using various combinations of DFT functionals and basis sets, with and without the inclusion of Grimme D3 empirical dispersion correction. These diverse computational approaches yield optimized geometries that are subsequently compared against the available experimental structural data to assess their accuracy. The aim is to identify a reliable DFT method for determining the geometries of bis(terpyridine)iron(II) and its related complexes.
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Affiliation(s)
- Evangelia Athanasopoulos
- Department of Chemistry, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa
| | | | - Jeanet Conradie
- Department of Chemistry, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa
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3
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Grunwald J, Torres J, Buchholz A, Näther C, Kämmerer L, Gruber M, Rohlf S, Thakur S, Wende H, Plass W, Kuch W, Tuczek F. Defying the inverse energy gap law: a vacuum-evaporable Fe(ii) low-spin complex with a long-lived LIESST state. Chem Sci 2023; 14:7361-7380. [PMID: 37416721 PMCID: PMC10321519 DOI: 10.1039/d3sc00561e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 05/25/2023] [Indexed: 07/08/2023] Open
Abstract
The novel vacuum-evaporable complex [Fe(pypypyr)2] (pypypyr = bipyridyl pyrrolide) was synthesised and analysed as bulk material and as a thin film. In both cases, the compound is in its low-spin state up to temperatures of at least 510 K. Thus, it is conventionally considered a pure low-spin compound. According to the inverse energy gap law, the half time of the light-induced excited high-spin state of such compounds at temperatures approaching 0 K is expected to be in the regime of micro- or nanoseconds. In contrast to these expectations, the light-induced high-spin state of the title compound has a half time of several hours. We attribute this behaviour to a large structural difference between the two spin states along with four distinct distortion coordinates associated with the spin transition. This leads to a breakdown of single-mode behaviour and thus drastically decreases the relaxation rate of the metastable high-spin state. These unprecedented properties open up new strategies for the development of compounds showing light-induced excited spin state trapping (LIESST) at high temperatures, potentially around room temperature, which is relevant for applications in molecular spintronics, sensors, displays and the like.
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Affiliation(s)
- Jan Grunwald
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel 24098 Kiel Germany +49 431 880 1520 +49 431 880 1410
| | - Jorge Torres
- Institut für Experimentalphysik, Freie Universität Berlin Arnimallee 14 14195 Berlin Germany +49 30 838 452098 +49 30 838 52098
| | - Axel Buchholz
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena 07743 Jena Germany
| | - Christian Näther
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel 24098 Kiel Germany +49 431 880 1520 +49 431 880 1410
| | - Lea Kämmerer
- Fakultät für Physik and CENIDE, Universität Duisburg-Essen 47048 Duisburg Germany
| | - Manuel Gruber
- Fakultät für Physik and CENIDE, Universität Duisburg-Essen 47048 Duisburg Germany
| | - Sebastian Rohlf
- Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel 24098 Kiel Germany
| | - Sangeeta Thakur
- Institut für Experimentalphysik, Freie Universität Berlin Arnimallee 14 14195 Berlin Germany +49 30 838 452098 +49 30 838 52098
| | - Heiko Wende
- Fakultät für Physik and CENIDE, Universität Duisburg-Essen 47048 Duisburg Germany
| | - Winfried Plass
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena 07743 Jena Germany
| | - Wolfgang Kuch
- Institut für Experimentalphysik, Freie Universität Berlin Arnimallee 14 14195 Berlin Germany +49 30 838 452098 +49 30 838 52098
| | - Felix Tuczek
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel 24098 Kiel Germany +49 431 880 1520 +49 431 880 1410
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4
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Yadav O, Ansari M, Ansari A. Electronic structures, bonding and energetics of non-heme mono and dinuclear iron-TPA complexes: a computational exploration. Struct Chem 2021. [DOI: 10.1007/s11224-021-01775-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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5
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Sárosiné Szemes D, Keszthelyi T, Papp M, Varga L, Vankó G. Quantum-chemistry-aided ligand engineering for potential molecular switches: changing barriers to tune excited state lifetimes. Chem Commun (Camb) 2020; 56:11831-11834. [PMID: 33021253 DOI: 10.1039/d0cc04467a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Substitution of terpyridine at the 4' position with electron withdrawing and donating groups is used to tune the quintet lifetime of its iron(ii) complex. DFT calculations suggest that the energy barrier between the quintet and singlet states can be altered significantly upon substitution, inducing a large variation of the lifetime of the photoexcited quintet state. This prediction was experimentally verified by transient optical absorption spectroscopy and good agreement with the trend expected from the calculations was found. This demonstrates that the potential energy landscape can indeed be rationally tailored by relevant modifications based on DFT predictions. This result should pave the way to advancing efficient theory-based ligand engineering of functional molecules to a wide range of applications.
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Li Y, Fan X, Wang J, Kong C, Chen J, Wang S, Li H, Bai F, Zhang H. Comparative study on the photophysical properties between carbene‐based Fe (II) and Ru (II) complexes. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5821] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yuan Li
- International Joint Research Laboratory of Nano‐Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry Jilin University Changchun 130023 People's Republic of China
| | - Xue‐Wen Fan
- International Joint Research Laboratory of Nano‐Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry Jilin University Changchun 130023 People's Republic of China
| | - Jian Wang
- International Joint Research Laboratory of Nano‐Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry Jilin University Changchun 130023 People's Republic of China
| | - Chui‐Peng Kong
- International Joint Research Laboratory of Nano‐Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry Jilin University Changchun 130023 People's Republic of China
| | - Jie Chen
- International Joint Research Laboratory of Nano‐Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry Jilin University Changchun 130023 People's Republic of China
| | - Shi‐Ping Wang
- International Joint Research Laboratory of Nano‐Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry Jilin University Changchun 130023 People's Republic of China
| | - Hui‐Cong Li
- International Joint Research Laboratory of Nano‐Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry Jilin University Changchun 130023 People's Republic of China
| | - Fu‐Quan Bai
- International Joint Research Laboratory of Nano‐Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry Jilin University Changchun 130023 People's Republic of China
| | - Hong‐Xing Zhang
- International Joint Research Laboratory of Nano‐Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry Jilin University Changchun 130023 People's Republic of China
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Kaur G, Polson MIJ, Hartshorn RM. 4′-(2-Methylphenyl)-2,2′:6′,2″-terpyridine: coordination chemistry with Ni(II), Cu(II), Zn(II) and Ag(I). J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1580698] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Gurpreet Kaur
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand
| | - Matthew I. J. Polson
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand
| | - Richard M. Hartshorn
- School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand
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8
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Lawson Daku LM. Spin-state dependence of the structural and vibrational properties of solvated iron(ii) polypyridyl complexes from AIMD simulations: II. aqueous [Fe(tpy)2]Cl2. Phys Chem Chem Phys 2019; 21:650-661. [DOI: 10.1039/c8cp06671j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
LS and HS Fe–O radial distribution functions and running coordination numbers for aqueous [Fe(tpy)2]Cl2: in both spin states, the first hydration shell of [Fe(tpy)2]2+ consists in a chain of ∼15 hydrogen-bonded water molecules wrapped around the ligands.
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9
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Li Y, Fan XW, Chen J, Bai FQ, Zhang HX. Theoretical study on the excited state decay properties of iron(ii) polypyridine complexes substituted by bromine and chlorine. RSC Adv 2019; 9:31621-31627. [PMID: 35527963 PMCID: PMC9072724 DOI: 10.1039/c9ra06366h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 09/17/2019] [Indexed: 12/19/2022] Open
Abstract
Transition metal iron(ii) polypyridyl complexes with quintet ground states were deeply investigated by density functional theory (DFT) and time-dependent density functional theory (TDDFT). Compared with the parent complex [Fe(tpy)2]2+ (tpy = 2,2′:6′,2′′-terpyridine), the ground states of the complexes substituted by halogen atoms changed from singlet states to quintet states with rare high spin excited state lifetimes. The substituted complex [Fe(dbtpy)2]2+ (1) results in a high spin metal–ligand charge transfer lifetime of 17.4 ps, which is 1.4 ps longer than that of [Fe(dctpy)2]2+ (2) with the substitution of chlorine atoms. The reason for this is explored by a combination of electronic structures, absorption spectra, extended transition state coupled with natural orbitals for chemical valence (ETS-NOCV) studies and potential energy curves (PECs). The distortion of 1 in the angles and dihedrals of the ligands is slightly larger than that in 2, although the average metal–ligand bond lengths of the latter are larger. The twisted octahedron decreases the interactions between the d orbitals of iron(ii) and the n/π orbitals of the ligands. Compared with 2, the enlarged energy gaps among the different PECs of 1 and the increased energy crossing points caused by the larger distortion result in the increase of its excited state lifetime. The different pairwise orbital interaction contributions between the metal center and the ligands in their singlet states are qualitatively estimated by ETS-NOCV. The results show that the substitution of bromine atoms will decrease the electrostatic attraction between the metal and ligands but not significantly impact the orbital interactions. Transition metal iron(ii) halogen substituted polypyridyl complexes with quintet ground states were deeply investigated by density functional theory (DFT) and time-dependent density functional theory (TDDFT).![]()
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Affiliation(s)
- Yuan Li
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
| | - Xue-Wen Fan
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
| | - Jie Chen
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
| | - Fu-Quan Bai
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
| | - Hong-Xing Zhang
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
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10
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McPherson JN, Elton TE, Colbran SB. A Strain-Deformation Nexus within Pincer Ligands: Application to the Spin States of Iron(II) Complexes. Inorg Chem 2018; 57:12312-12322. [DOI: 10.1021/acs.inorgchem.8b02038] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- James N. McPherson
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Timothy E. Elton
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Stephen B. Colbran
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
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11
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12
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Mukherjee S, Liu C, Jakubikova E. Comparison of Interfacial Electron Transfer Efficiency in [Fe(ctpy)2]2+–TiO2 and [Fe(cCNC)2]2+–TiO2 Assemblies: Importance of Conformational Sampling. J Phys Chem A 2018; 122:1821-1830. [DOI: 10.1021/acs.jpca.7b10932] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sriparna Mukherjee
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Chang Liu
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Elena Jakubikova
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
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13
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Fatur SM, Shepard SG, Higgins RF, Shores MP, Damrauer NH. A Synthetically Tunable System To Control MLCT Excited-State Lifetimes and Spin States in Iron(II) Polypyridines. J Am Chem Soc 2017; 139:4493-4505. [DOI: 10.1021/jacs.7b00700] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Steven M. Fatur
- Department
of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Samuel G. Shepard
- Department
of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Robert F. Higgins
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Matthew P. Shores
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Niels H. Damrauer
- Department
of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
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14
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Barrios LA, Bartual-Murgui C, Peyrecave-Lleixà E, Le Guennic B, Teat SJ, Roubeau O, Aromí G. Homoleptic versus Heteroleptic Formation of Mononuclear Fe(II) Complexes with Tris-Imine Ligands. Inorg Chem 2016; 55:4110-6. [PMID: 27074060 DOI: 10.1021/acs.inorgchem.5b02058] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We show a marked tendency of Fe(II) to form heteroleptic [Fe(L)(L')](ClO4)2 complexes from pairs of chelating tris-imine 3bpp, tpy, or 2bbp ligands. New synthetic avenues for spin crossover research become thus available, here illustrated with three new heteroleptic compounds with differing magnetic behaviors: [Fe(H4L1)(Cl-tpy)](ClO4)2·C3H6O (1), [Fe(H2L3)(Me3bpp)](ClO4)2·C3H6O (2), [Fe(H4L1)(2bbp)](ClO4)2·3C3H6O (3). Structural studies demonstrate that 1 is in the low-spin (LS) state up to 350 K, while complexes 2 and 3 are, by contrast, in the high-spin (HS) state down to 2 K, as corroborated through magnetic susceptibility measurements. Upon exposure to the atmosphere, the latter exhibits the release of three molecules of acetone per complex, turning into the solvent-free analogue [Fe(H4L1)(2bbp)](ClO4)2 (3a), through a single-crystal-to-single-crystal transformation. This guest extrusion process is accompanied by a spin switch, from HS to LS.
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Affiliation(s)
- Leoní A Barrios
- Departament de Química Inorgánica, Universitat de Barcelona , Diagonal 645, 08028, Barcelona, Spain
| | - Carlos Bartual-Murgui
- Departament de Química Inorgánica, Universitat de Barcelona , Diagonal 645, 08028, Barcelona, Spain.,Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC and Universidad de Zaragoza , Plaza San Francisco s/n, 50009 Zaragoza, Spain
| | - Eugènia Peyrecave-Lleixà
- Departament de Química Inorgánica, Universitat de Barcelona , Diagonal 645, 08028, Barcelona, Spain
| | - Boris Le Guennic
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1 , 263 Avenue du Général Leclerc, 35042 Cedex Rennes, France
| | - Simon J Teat
- Advanced Light Source, Lawrence Berkeley National Lab , 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 Inorgánica, Universitat de Barcelona , Diagonal 645, 08028, Barcelona, Spain
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15
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Karipidou Z, Branchi B, Sarpasan M, Knorr N, Rodin V, Friederich P, Neumann T, Meded V, Rosselli S, Nelles G, Wenzel W, Rampi MA, von Wrochem F. Ultrarobust Thin-Film Devices from Self-Assembled Metal-Terpyridine Oligomers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:3473-3480. [PMID: 26970207 DOI: 10.1002/adma.201504847] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 12/10/2015] [Indexed: 06/05/2023]
Abstract
Ultrathin molecular layers of Fe(II) -terpyridine oligomers allow the fabrication of large-area crossbar junctions by conventional electrode vapor deposition. The junctions are electrically stable for over 2.5 years and operate over a wide range of temperatures (150-360 K) and voltages (±3 V) due to the high cohesive energy and packing density of the oligomer layer. Electrical measurements reveal ideal Richardson-Shottky emission in surprising agreement with electrochemical, optical, and photoemission data.
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Affiliation(s)
- Zoi Karipidou
- Sony Deutschland GmbH, Materials Science Laboratory, Hedelfinger Strasse 61, 70327, Stuttgart, Germany
| | - Barbara Branchi
- Dipartimento di Chimica, Università di Ferrara, Via Borsari 46, 44100, Ferrara, Italy
| | - Mustafa Sarpasan
- Sony Deutschland GmbH, Materials Science Laboratory, Hedelfinger Strasse 61, 70327, Stuttgart, Germany
| | - Nikolaus Knorr
- Sony Deutschland GmbH, Materials Science Laboratory, Hedelfinger Strasse 61, 70327, Stuttgart, Germany
| | - Vadim Rodin
- Sony Deutschland GmbH, Materials Science Laboratory, Hedelfinger Strasse 61, 70327, Stuttgart, Germany
| | - Pascal Friederich
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76021, Karlsruhe, Germany
| | - Tobias Neumann
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76021, Karlsruhe, Germany
| | - Velimir Meded
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76021, Karlsruhe, Germany
| | - Silvia Rosselli
- Sony Deutschland GmbH, Materials Science Laboratory, Hedelfinger Strasse 61, 70327, Stuttgart, Germany
| | - Gabriele Nelles
- Sony Deutschland GmbH, Materials Science Laboratory, Hedelfinger Strasse 61, 70327, Stuttgart, Germany
| | - Wolfgang Wenzel
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76021, Karlsruhe, Germany
| | - Maria Anita Rampi
- Dipartimento di Chimica, Università di Ferrara, Via Borsari 46, 44100, Ferrara, Italy
| | - Florian von Wrochem
- Sony Deutschland GmbH, Materials Science Laboratory, Hedelfinger Strasse 61, 70327, Stuttgart, Germany
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16
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Nance J, Bowman DN, Mukherjee S, Kelley CT, Jakubikova E. Insights into the Spin-State Transitions in [Fe(tpy)2]2+: Importance of the Terpyridine Rocking Motion. Inorg Chem 2015; 54:11259-68. [DOI: 10.1021/acs.inorgchem.5b01747] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- James Nance
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
| | - David N. Bowman
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
| | - Sriparna Mukherjee
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
| | - C. T. Kelley
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
| | - Elena Jakubikova
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
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17
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Bowman DN, Bondarev A, Mukherjee S, Jakubikova E. Tuning the Electronic Structure of Fe(II) Polypyridines via Donor Atom and Ligand Scaffold Modifications: A Computational Study. Inorg Chem 2015; 54:8786-93. [DOI: 10.1021/acs.inorgchem.5b01409] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David N. Bowman
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Alexey Bondarev
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Sriparna Mukherjee
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Elena Jakubikova
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
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18
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Vankó G, Bordage A, Pápai M, Haldrup K, Glatzel P, March AM, Doumy G, Britz A, Galler A, Assefa T, Cabaret D, Juhin A, van Driel TB, Kjær K, Dohn A, Møller KB, Lemke HT, Gallo E, Rovezzi M, Németh Z, Rozsályi E, Rozgonyi T, Uhlig J, Sundström V, Nielsen MM, Young L, Southworth SH, Bressler C, Gawelda W. Detailed Characterization of a Nanosecond-Lived Excited State: X-ray and Theoretical Investigation of the Quintet State in Photoexcited [Fe(terpy) 2] 2. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2015; 119:5888-5902. [PMID: 25838847 PMCID: PMC4368081 DOI: 10.1021/acs.jpcc.5b00557] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 02/24/2015] [Indexed: 05/19/2023]
Abstract
Theoretical predictions show that depending on the populations of the Fe 3d xy , 3d xz , and 3d yz orbitals two possible quintet states can exist for the high-spin state of the photoswitchable model system [Fe(terpy)2]2+. The differences in the structure and molecular properties of these 5B2 and 5E quintets are very small and pose a substantial challenge for experiments to resolve them. Yet for a better understanding of the physics of this system, which can lead to the design of novel molecules with enhanced photoswitching performance, it is vital to determine which high-spin state is reached in the transitions that follow the light excitation. The quintet state can be prepared with a short laser pulse and can be studied with cutting-edge time-resolved X-ray techniques. Here we report on the application of an extended set of X-ray spectroscopy and scattering techniques applied to investigate the quintet state of [Fe(terpy)2]2+ 80 ps after light excitation. High-quality X-ray absorption, nonresonant emission, and resonant emission spectra as well as X-ray diffuse scattering data clearly reflect the formation of the high-spin state of the [Fe(terpy)2]2+ molecule; moreover, extended X-ray absorption fine structure spectroscopy resolves the Fe-ligand bond-length variations with unprecedented bond-length accuracy in time-resolved experiments. With ab initio calculations we determine why, in contrast to most related systems, one configurational mode is insufficient for the description of the low-spin (LS)-high-spin (HS) transition. We identify the electronic structure origin of the differences between the two possible quintet modes, and finally, we unambiguously identify the formed quintet state as 5E, in agreement with our theoretical expectations.
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Affiliation(s)
- György Vankó
- Wigner
Research Centre for Physics, Hungarian Academy
Sciences, P.O.B. 49., H-1525 Budapest, Hungary
- E-mail:
| | - Amélie Bordage
- Wigner
Research Centre for Physics, Hungarian Academy
Sciences, P.O.B. 49., H-1525 Budapest, Hungary
| | - Mátyás Pápai
- Wigner
Research Centre for Physics, Hungarian Academy
Sciences, P.O.B. 49., H-1525 Budapest, Hungary
| | - Kristoffer Haldrup
- Centre
for Molecular Movies, Technical University
of Denmark, Department of Physics, DK-2800 Kgs. Lyngby, Denmark
| | - Pieter Glatzel
- European
Synchrotron Radiation Facility (ESRF), CS40220, Grenoble 38043 Cedex 9, France
| | - Anne Marie March
- X-ray
Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United
States
| | - Gilles Doumy
- X-ray
Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United
States
| | - Alexander Britz
- European
XFEL, Albert-Einstein-Ring 19, D-22761 Hamburg, Germany
- The
Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Andreas Galler
- European
XFEL, Albert-Einstein-Ring 19, D-22761 Hamburg, Germany
| | - Tadesse Assefa
- European
XFEL, Albert-Einstein-Ring 19, D-22761 Hamburg, Germany
| | - Delphine Cabaret
- Institut
de Minéralogie, de Physique des Matériaux, et de Cosmochimie
(IMPMC), Sorbonne Universités - UPMC
Univ. Paris 06, UMR CNRS 7590, Muséum National d’Histoire
Naturelle, UR IRD 206, 4 Place Jussieu, F-75005 Paris, France
| | - Amélie Juhin
- Institut
de Minéralogie, de Physique des Matériaux, et de Cosmochimie
(IMPMC), Sorbonne Universités - UPMC
Univ. Paris 06, UMR CNRS 7590, Muséum National d’Histoire
Naturelle, UR IRD 206, 4 Place Jussieu, F-75005 Paris, France
| | - Tim B. van Driel
- Centre
for Molecular Movies, Technical University
of Denmark, Department of Physics, DK-2800 Kgs. Lyngby, Denmark
| | - Kasper
S. Kjær
- Centre
for Molecular Movies, Technical University
of Denmark, Department of Physics, DK-2800 Kgs. Lyngby, Denmark
- Department
of Chemical Physics, Lund University, Box 124, 22100 Lund, Sweden
| | - Asmus Dohn
- Centre
for Molecular Movies, Technical University
of Denmark, Department of Chemistry, DK-2800 Kgs. Lyngby, Denmark
| | - Klaus B. Møller
- Centre
for Molecular Movies, Technical University
of Denmark, Department of Chemistry, DK-2800 Kgs. Lyngby, Denmark
| | - Henrik T. Lemke
- SLAC
National Accelerator Laboratory, Linac Coherent
Light Source, Menlo Park, California 94025, United States
| | - Erik Gallo
- European
Synchrotron Radiation Facility (ESRF), CS40220, Grenoble 38043 Cedex 9, France
| | - Mauro Rovezzi
- European
Synchrotron Radiation Facility (ESRF), CS40220, Grenoble 38043 Cedex 9, France
| | - Zoltán Németh
- Wigner
Research Centre for Physics, Hungarian Academy
Sciences, P.O.B. 49., H-1525 Budapest, Hungary
| | - Emese Rozsályi
- Wigner
Research Centre for Physics, Hungarian Academy
Sciences, P.O.B. 49., H-1525 Budapest, Hungary
| | - Tamás Rozgonyi
- Research
Centre for Natural Sciences, Hungarian Academy
of Sciences, P.O. Box 286, H-1519 Budapest, Hungary
| | - Jens Uhlig
- Department
of Chemical Physics, Lund University, Box 124, 22100 Lund, Sweden
| | - Villy Sundström
- Department
of Chemical Physics, Lund University, Box 124, 22100 Lund, Sweden
| | - Martin M. Nielsen
- Centre
for Molecular Movies, Technical University
of Denmark, Department of Physics, DK-2800 Kgs. Lyngby, Denmark
| | - Linda Young
- X-ray
Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United
States
| | - Stephen H. Southworth
- X-ray
Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United
States
| | - Christian Bressler
- European
XFEL, Albert-Einstein-Ring 19, D-22761 Hamburg, Germany
- The
Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Wojciech Gawelda
- European
XFEL, Albert-Einstein-Ring 19, D-22761 Hamburg, Germany
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19
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Mukherjee S, Bowman DN, Jakubikova E. Cyclometalated Fe(II) complexes as sensitizers in dye-sensitized solar cells. Inorg Chem 2014; 54:560-9. [PMID: 25531506 DOI: 10.1021/ic502438g] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Dye-sensitized solar cells (DSSCs) often utilize transition metal-based chromophores for light absorption and semiconductor sensitization. Ru(II)-based dyes are among the most commonly used sensitizers in DSSCs. As ruthenium is both expensive and rare, complexes based on cheaper and more abundant iron could serve as a good alternative. In this study, we investigate Fe(II)-bis(terpyridine) and its cyclometalated analogues, in which pyridine ligands are systematically replaced by aryl groups, as potential photosensitizers in DSSCs. We employ density functional theory at the B3LYP/6-31G*,SDD level to obtain the ground state electronic structure of these complexes. Quantum dynamics simulations are utilized to study interfacial electron transfer between the Fe(II) photosensitizers and a titanium dioxide semiconductor. We find that cyclometalation stabilizes the singlet ground state of these complexes by 8-19 kcal/mol but reduces the electron density on the carboxylic acid attached to the aryl ring. The results suggest that cyclometalation provides a feasible route to increasing the efficiency of Fe(II) photosensitizers but that care should be taken in choosing the substitution position for the semiconductor anchoring group.
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Affiliation(s)
- Sriparna Mukherjee
- Department of Chemistry, North Carolina State University , Raleigh, North Carolina 27695, United States
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20
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Palion-Gazda J, Świtlicka-Olszewska A, Machura B, Grancha T, Pardo E, Lloret F, Julve M. High-Temperature Spin Crossover in a Mononuclear Six-Coordinate Cobalt(II) Complex. Inorg Chem 2014; 53:10009-11. [DOI: 10.1021/ic501195y] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Joanna Palion-Gazda
- Department of Crystallography, Institute of Chemistry, University of Silesia, 9th Szkolna Street, 40006 Katowice, Poland
| | - Anna Świtlicka-Olszewska
- Department of Crystallography, Institute of Chemistry, University of Silesia, 9th Szkolna Street, 40006 Katowice, Poland
| | - Barbara Machura
- Department of Crystallography, Institute of Chemistry, University of Silesia, 9th Szkolna Street, 40006 Katowice, Poland
| | - Thais Grancha
- Departament de Química Inorgànica, Instituto de Ciencia
Molecular (ICMol), Universitat de València, 46980 Paterna,
València, Spain
| | - Emilio Pardo
- Departament de Química Inorgànica, Instituto de Ciencia
Molecular (ICMol), Universitat de València, 46980 Paterna,
València, Spain
| | - Francesc Lloret
- Departament de Química Inorgànica, Instituto de Ciencia
Molecular (ICMol), Universitat de València, 46980 Paterna,
València, Spain
| | - Miguel Julve
- Departament de Química Inorgànica, Instituto de Ciencia
Molecular (ICMol), Universitat de València, 46980 Paterna,
València, Spain
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21
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Rudavskyi A, Sousa C, de Graaf C, Havenith RWA, Broer R. Computational approach to the study of thermal spin crossover phenomena. J Chem Phys 2014; 140:184318. [DOI: 10.1063/1.4875695] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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22
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Jamula LL, Brown AM, Guo D, McCusker JK. Synthesis and Characterization of a High-Symmetry Ferrous Polypyridyl Complex: Approaching the 5T2/3T1 Crossing Point for FeII. Inorg Chem 2013; 53:15-7. [DOI: 10.1021/ic402407k] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lindsey L. Jamula
- Department of Chemistry, Michigan State University, 578
South Shaw Lane, East
Lansing, Michigan 48824, United States
| | - Allison M. Brown
- Department of Chemistry, Michigan State University, 578
South Shaw Lane, East
Lansing, Michigan 48824, United States
| | - Dong Guo
- Department of Chemistry, Michigan State University, 578
South Shaw Lane, East
Lansing, Michigan 48824, United States
| | - James K. McCusker
- Department of Chemistry, Michigan State University, 578
South Shaw Lane, East
Lansing, Michigan 48824, United States
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23
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Dixon IM, Alary F, Boggio-Pasqua M, Heully JL. The (N4C2)2– Donor Set as Promising Motif for Bis(tridentate) Iron(II) Photoactive Compounds. Inorg Chem 2013; 52:13369-74. [DOI: 10.1021/ic402453p] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Isabelle M. Dixon
- Laboratoire de Chimie et Physique
Quantiques, UMR 5626, CNRS/Université Paul Sabatier-Toulouse III, 118 route de Narbonne, Toulouse, France
| | - Fabienne Alary
- Laboratoire de Chimie et Physique
Quantiques, UMR 5626, CNRS/Université Paul Sabatier-Toulouse III, 118 route de Narbonne, Toulouse, France
| | - Martial Boggio-Pasqua
- Laboratoire de Chimie et Physique
Quantiques, UMR 5626, CNRS/Université Paul Sabatier-Toulouse III, 118 route de Narbonne, Toulouse, France
| | - Jean-Louis Heully
- Laboratoire de Chimie et Physique
Quantiques, UMR 5626, CNRS/Université Paul Sabatier-Toulouse III, 118 route de Narbonne, Toulouse, France
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24
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Kershaw Cook LJ, Tuna F, Halcrow MA. Iron(ii) and cobalt(ii) complexes of tris-azinyl analogues of 2,2′:6′,2′′-terpyridine. Dalton Trans 2013. [DOI: 10.1039/c2dt31736b] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Machan CW, Adelhardt M, Sarjeant AA, Stern CL, Sutter J, Meyer K, Mirkin CA. One-Pot Synthesis of an Fe(II) Bis-Terpyridine Complex with Allosterically Regulated Electronic Properties. J Am Chem Soc 2012; 134:16921-4. [DOI: 10.1021/ja3045019] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Charles W. Machan
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208, United States
| | - Mario Adelhardt
- Department of Chemistry and
Pharmacy, Inorganic Chemistry, University Erlangen-Nuremberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Amy A. Sarjeant
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208, United States
| | - Charlotte L. Stern
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208, United States
| | - Jörg Sutter
- Department of Chemistry and
Pharmacy, Inorganic Chemistry, University Erlangen-Nuremberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Karsten Meyer
- Department of Chemistry and
Pharmacy, Inorganic Chemistry, University Erlangen-Nuremberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Chad A. Mirkin
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208, United States
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26
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England J, Scarborough CC, Weyhermüller T, Sproules S, Wieghardt K. Electronic Structures of the Electron Transfer Series [M(bpy)3]n, [M(tpy)2]n, and [Fe(tbpy)3]n(M = Fe, Ru;n= 3+, 2+, 1+, 0, 1-): A Mössbauer Spectroscopic and DFT Study. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200232] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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27
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Schubert US, Eschbaumer C, Weidl CH. Design of supramolecular metal complexing polymers: synthesis, complexation, and polymerization of 5,5"-bisfunctionalized terpyridine building blocks. Des Monomers Polym 2012. [DOI: 10.1163/156855599x00016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Ulrich S. Schubert
- a Lehrstuhl für Makromolekulare Stoffe, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Christian Eschbaumer
- b Lehrstuhl für Makromolekulare Stoffe, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Christian H. Weidl
- c Lehrstuhl für Makromolekulare Stoffe, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
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28
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29
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Goodwin HA. Spin Crossover in Iron(II) Tris(diimine) and Bis(terimine) Systems. Top Curr Chem (Cham) 2012. [DOI: 10.1007/b13529] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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30
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Pazderski L, Pawlak T, Sitkowski J, Kozerski L, Szlyk E. 1H, 13C, 15N NMR coordination shifts in Fe(II), Ru(II) and Os(II) cationic complexes with 2,2':6',2″-terpyridine. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2011; 49:237-241. [PMID: 21491480 DOI: 10.1002/mrc.2739] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Revised: 01/12/2011] [Accepted: 01/13/2011] [Indexed: 05/30/2023]
Abstract
(1)H, (13)C and (15)N NMR studies of iron(II), ruthenium(II) and osmium(II) bis-chelated cationic complexes with 2,2':6',2″-terpyridine ([M(terpy)(2) ](2+) ; M = Fe, Ru, Os) were performed. Significant shielding of nitrogen-adjacent H(6) and deshielding of H(3'), H(4') protons were observed, both effects being mostly expressed for Fe(II) compounds. The metal-bonded nitrogens were shielded, this effect being much larger for the outer N(1), N(1″) than the inner N(1') atoms, and enhanced in the Fe(II) → Ru(II) → Os(II) series.
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Affiliation(s)
- Leszek Pazderski
- Faculty of Chemistry, Nicholas Copernicus University, Gagarina 7, PL-87100 Toruń, Poland.
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31
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Hall NA, Duboc C, Collomb MN, Deronzier A, Blackman AG. Factors influencing mononuclear versus multinuclear coordination in a series of potentially hexadentate acyclic N6 ligands: the roles of flexibility and chelate ring size. Dalton Trans 2011; 40:12075-82. [DOI: 10.1039/c1dt10627a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Schwarz G, Bodenthin Y, Tomkowicz Z, Haase W, Geue T, Kohlbrecher J, Pietsch U, Kurth DG. Tuning the Structure and the Magnetic Properties of Metallo-supramolecular Polyelectrolyte−Amphiphile Complexes. J Am Chem Soc 2010; 133:547-58. [DOI: 10.1021/ja108416a] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guntram Schwarz
- Julius-Maximilians University Würzburg, Chemical Technology of Advanced Materials, Röntgenring 11, D-97070 Würzburg, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland, Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland,
| | - Yves Bodenthin
- Julius-Maximilians University Würzburg, Chemical Technology of Advanced Materials, Röntgenring 11, D-97070 Würzburg, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland, Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland,
| | - Zbigniew Tomkowicz
- Julius-Maximilians University Würzburg, Chemical Technology of Advanced Materials, Röntgenring 11, D-97070 Würzburg, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland, Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland,
| | - Wolfgang Haase
- Julius-Maximilians University Würzburg, Chemical Technology of Advanced Materials, Röntgenring 11, D-97070 Würzburg, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland, Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland,
| | - Thomas Geue
- Julius-Maximilians University Würzburg, Chemical Technology of Advanced Materials, Röntgenring 11, D-97070 Würzburg, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland, Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland,
| | - Joachim Kohlbrecher
- Julius-Maximilians University Würzburg, Chemical Technology of Advanced Materials, Röntgenring 11, D-97070 Würzburg, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland, Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland,
| | - Ullrich Pietsch
- Julius-Maximilians University Würzburg, Chemical Technology of Advanced Materials, Röntgenring 11, D-97070 Würzburg, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland, Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland,
| | - Dirk G. Kurth
- Julius-Maximilians University Würzburg, Chemical Technology of Advanced Materials, Röntgenring 11, D-97070 Würzburg, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland, Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland,
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33
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Wei S, Wei L, Ying-Kai X, Hong-Mei W, Mei S, Yang L, Ping-Ping S. Structure and Photosynthetic Mimicking of Bis (2,6-bis (benzimidazol-2-yl) pyridine) manganese (II). CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20030210616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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34
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Handel RW, Willms H, Jameson GB, Berry KJ, Moubaraki B, Murray KS, Brooker S. Factors Influencing the Structural and Magnetic Properties of Octahedral Cobalt(II) and Iron(II) Complexes of Terdentate N3 Schiff Base Ligands. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000288] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Huang W, You W, Wang L, Yao C. Anionic effects on the formation of tridentate 4′-chloro-2,2′:6′,2″-terpyridine copper(II) complexes having 1:1 or 1:2 ratio of metal and ligand and their crystal symmetry. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.09.046] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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36
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Bodenthin Y, Schwarz G, Tomkowicz Z, Geue T, Haase W, Pietsch U, Kurth DG. Liquid Crystalline Phase Transition Induces Spin Crossover in a Polyelectrolyte Amphiphile Complex. J Am Chem Soc 2009; 131:2934-41. [DOI: 10.1021/ja808278s] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yves Bodenthin
- University Siegen, FB7 Solid State Physics, D-57068 Siegen, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany, Chemische Technologie der Materialsynthese, University Würzburg, D-97070 Würzburg, Germany, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland,
| | - Guntram Schwarz
- University Siegen, FB7 Solid State Physics, D-57068 Siegen, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany, Chemische Technologie der Materialsynthese, University Würzburg, D-97070 Würzburg, Germany, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland,
| | - Zbigniew Tomkowicz
- University Siegen, FB7 Solid State Physics, D-57068 Siegen, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany, Chemische Technologie der Materialsynthese, University Würzburg, D-97070 Würzburg, Germany, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland,
| | - Thomas Geue
- University Siegen, FB7 Solid State Physics, D-57068 Siegen, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany, Chemische Technologie der Materialsynthese, University Würzburg, D-97070 Würzburg, Germany, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland,
| | - Wolfgang Haase
- University Siegen, FB7 Solid State Physics, D-57068 Siegen, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany, Chemische Technologie der Materialsynthese, University Würzburg, D-97070 Würzburg, Germany, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland,
| | - Ullrich Pietsch
- University Siegen, FB7 Solid State Physics, D-57068 Siegen, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany, Chemische Technologie der Materialsynthese, University Würzburg, D-97070 Würzburg, Germany, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland,
| | - Dirk G. Kurth
- University Siegen, FB7 Solid State Physics, D-57068 Siegen, Germany, Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany, Chemische Technologie der Materialsynthese, University Würzburg, D-97070 Würzburg, Germany, Institute of Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, D-64287, Germany, Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland,
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Sjödin M, Gätjens J, Tabares LC, Thuéry P, Pecoraro VL, Un S. Tuning the Redox Properties of Manganese(II) and Its Implications to the Electrochemistry of Manganese and Iron Superoxide Dismutases. Inorg Chem 2008; 47:2897-908. [DOI: 10.1021/ic702428s] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martin Sjödin
- Service de bioénergétique biologie structurale et mécanismes, CNRS URA 2096, Institut de Biologie et de Technologies de Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France, Service de chimie moléculaire, CNRS URA 331, Institut Rayonnement Matière de Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France, and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
| | - Jessica Gätjens
- Service de bioénergétique biologie structurale et mécanismes, CNRS URA 2096, Institut de Biologie et de Technologies de Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France, Service de chimie moléculaire, CNRS URA 331, Institut Rayonnement Matière de Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France, and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
| | - Leandro C. Tabares
- Service de bioénergétique biologie structurale et mécanismes, CNRS URA 2096, Institut de Biologie et de Technologies de Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France, Service de chimie moléculaire, CNRS URA 331, Institut Rayonnement Matière de Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France, and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
| | - Pierre Thuéry
- Service de bioénergétique biologie structurale et mécanismes, CNRS URA 2096, Institut de Biologie et de Technologies de Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France, Service de chimie moléculaire, CNRS URA 331, Institut Rayonnement Matière de Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France, and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
| | - Vincent L. Pecoraro
- Service de bioénergétique biologie structurale et mécanismes, CNRS URA 2096, Institut de Biologie et de Technologies de Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France, Service de chimie moléculaire, CNRS URA 331, Institut Rayonnement Matière de Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France, and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
| | - Sun Un
- Service de bioénergétique biologie structurale et mécanismes, CNRS URA 2096, Institut de Biologie et de Technologies de Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France, Service de chimie moléculaire, CNRS URA 331, Institut Rayonnement Matière de Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France, and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
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38
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Huang W, Qian H. Supramolecular frameworks composed of Ru(II), Cu(II), Zn(II), Ni(II) and Fe(II) complexes having tridentate 4′-chloro-2,2′:6′,2″-terpyridine ligand and 1:1 or 1:2 ratios of metal and ligand. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2007.03.038] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kirgan RA, Rillema DP. Computational Study of Iron(II) Systems Containing Ligands with Nitrogen Heterocyclic Groups. J Phys Chem A 2007; 111:13157-62. [DOI: 10.1021/jp076334t] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- R. A. Kirgan
- Department of Chemistry, Wichita State University, 1854 North Fairmount, Wichita, Kansas 67260
| | - D. P. Rillema
- Department of Chemistry, Wichita State University, 1854 North Fairmount, Wichita, Kansas 67260
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40
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Toma LM, Armentano D, De Munno G, Sletten J, Lloret F, Julve M. 2,3,5,6-Tetrakis(2-pyridyl)pyrazine (tppz)-containing iron(II) complexes: Syntheses and crystal structures. Polyhedron 2007. [DOI: 10.1016/j.poly.2007.07.041] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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41
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Chan WY, Lough AJ, Manners I. Photoreactivity and Photopolymerization of Silicon-Bridged [1]Ferrocenophanes in the Presence of Terpyridine Initiators: Unprecedented Cleavage of Both Iron–Cyclopentadienyl Bonds in the Presence of Chlorosilanes. Chemistry 2007; 13:8867-76. [PMID: 17654755 DOI: 10.1002/chem.200700420] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The photopolymerisation of sila[1]ferrocenophane [Fe(eta-C5H4)2SiMe2] (3) with 4,4',4''-tri-tert-butyl-2,2':6',2''-terpyridine (tBu3terpy) as initiator has been explored. High-molecular-weight polyferrocenylsilane (PFS) [{Fe(eta-C5H4)2SiMe2}n] (5) was formed in high yield when a stoichiometric amount of tBu3terpy was used at 5 degrees C. Photopolymerisation of ferrocenophane 3 at higher temperatures gave PFS 5 in lower yield and with a reduced molecular weight as a result of a slower propagation rate. Remarkably, when Me3SiCl was added as a capping agent before photopolymerisation, subsequent photolysis of the reaction mixture resulted in the unprecedented cleavage of both iron-Cp bonds in ferrocenophane 3: iron(II) complex [Fe(tBu3terpy)2Cl2] (7Cl) was formed and the silane fragment (C5H4SiMe3)2SiMe2 (8) was released. The iron-Cp bond cleavage reaction also proceeded in ambient light, although longer reaction times were required. In addition, the unexpected cleavage chemistry in the presence of Me3SiCl was found to be applicable to other photoactive ferrocenes such as benzoylferrocene. For benzoylferrocene and ferrocenophane 3, the presence of metal-to-ligand charge transfer (MLCT) character in their low-energy transitions in the visible region probably facilitates photolytic iron-Cp bond cleavage, but this reactivity is suppressed when the strength of the iron-Cp bond is increased by the presence of electron-donating substituents on the cyclopentadienyl rings.
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Affiliation(s)
- Wing Yan Chan
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
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42
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Medlycott EA, Udachin KA, Hanan GS. Non-covalent polymerisation in the solid state: halogen–halogenvs. methyl–methyl interactions in the complexes of 2,4-di(2-pyridyl)-1,3,5-triazine ligands. Dalton Trans 2007:430-8. [PMID: 17213928 DOI: 10.1039/b613883g] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fe(II), Co(II), Ni(II) and Cu(II) complexes based on the triazine ligand 2,4-di(2'-pyridyl)-6-(p-bromo-phenyl)-1,3,5-triazine have been synthesised and characterised. The electrochemical, magnetic and spectroscopic properties of the complexes have also been investigated, and the electron deficient triazine ligand has been shown to affect each of these properties. Further investigation of solid state structures of the ligand and its Fe(II), Co(II) and Cu(II) complexes has established that stabilising Br-Br interactions exist which link neighbouring molecules to form one-dimensional tapes. A slight modification of the ligand, i.e., using 2,4-di(2'-pyridyl)-6-(p-methylphenyl)-1,3,5-triazine, in which the phenyl substituent has changed from a bromine to a methyl group, eliminates the one-dimensional tape and gives rise to significant pi-stacking interactions in the solid state.
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Affiliation(s)
- Elaine A Medlycott
- Département de Chimie, Université de Montréal, 2900 Edouard-Montpetit, Montreal, Quebec H3T 1J4, Canada
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43
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Freville F, Richard T, Bathany K, Moreau S. Targeting of Single-Stranded Oligonucleotides through Metal-Induced Cyclization of Short Complementary Strands. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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44
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Hauser A, Enachescu C, Daku ML, Vargas A, Amstutz N. Low-temperature lifetimes of metastable high-spin states in spin-crossover and in low-spin iron(II) compounds: The rule and exceptions to the rule. Coord Chem Rev 2006. [DOI: 10.1016/j.ccr.2005.12.006] [Citation(s) in RCA: 163] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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45
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Kolb U, Büscher K, Helm CA, Lindner A, Thünemann AF, Menzel M, Higuchi M, Kurth DG. The solid-state architecture of a metallosupramolecular polyelectrolyte. Proc Natl Acad Sci U S A 2006; 103:10202-10206. [PMID: 16801549 PMCID: PMC1502435 DOI: 10.1073/pnas.0601092103] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Self-assembly of Fe(II) and the ditopic ligand 1,4-bis(2,2':6',2''-terpyridine-4'-yl)benzene results in equilibrium structures in solutions, so-called metallosupramolecular coordination polyelectrolytes (MEPEs). It is exceedingly difficult to characterize such macromolecular assemblies, because of the dynamic nature. Therefore, hardly any structural information is available for this type of material. Here, we show that from dilute solutions, where small aggregates predominate, it is possible to grow nanoscopic crystals at an interface. A near atomic resolution structure of MEPE is obtained by investigating the nanoscopic crystals with electron diffraction in combination with molecular modeling. The analysis reveals a primitive monoclinic unit cell (P2(1)/c space group, a = 10.4 A, b = 10.7 A, c = 34.0 A, alpha = gamma = 90 degrees , beta = 95 degrees , rho = 1.26 g/cm(3), and Z = 4). The MEPE forms linear rods, which are organized into sheets. Four sheets intersect the unit cell, while adjacent sheets are rotated by 90 degrees with respect to each other. The pseudooctahedral coordination geometry of the Fe(II) centers is confirmed by Mössbauer spectroscopy. The combination of diffraction and molecular modeling presented here may be of general utility to address problems in structural materials science.
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Affiliation(s)
- Ute Kolb
- Institut für Physikalische Chemie, Johannes Gutenberg-Universität, Welderweg 11, D-55099 Mainz, Germany
| | - Karsten Büscher
- Institut für Physik, Ernst-Moritz-Arndt Universität, Friedrich-Ludwig-Jahn-Strasse 16, D-17489 Greifswald, Germany
| | - Christiane A Helm
- Institut für Physik, Ernst-Moritz-Arndt Universität, Friedrich-Ludwig-Jahn-Strasse 16, D-17489 Greifswald, Germany
| | - Anne Lindner
- Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany; and
| | - Andreas F Thünemann
- Bundesanstalt für Materialforschung and -prüfung, Richard-Willstaeter Strasse11, D-12489 Berlin, Germany
| | - Michael Menzel
- Bundesanstalt für Materialforschung and -prüfung, Richard-Willstaeter Strasse11, D-12489 Berlin, Germany
| | - Masayoshi Higuchi
- National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Dirk G Kurth
- Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany; and
- National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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46
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Bodenthin Y, Pietsch U, Grenzer J, Geue T, Möhwald H, Kurth DG. Structure and Temperature Behavior of Metallo-supramolecular Assemblies. J Phys Chem B 2005; 109:12795-9. [PMID: 16852587 DOI: 10.1021/jp0458001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A detailed structural analysis of a Langmuir-Blodgett (LB) multilayer composed of a polyelectrolyte-amphiphile complex (PAC) is presented. The PAC is self-assembled from metal ions, ditopic bis-terpyridines, and amphiphiles. The vertical structure of the LB multilayer is investigated by X-ray reflectometry. The multilayer has a periodicity of 57 A, which corresponds to an architecture of flat lying metallo-supramolecular coordination polyelectrolyte (MEPE) rods and upright-standing amphiphiles (dihexadecyl phosphate, DHP). In-plane diffraction reveals hexagonal packing of the DHP molecules. Using extended X-ray absorption fine structure (EXAFS) experiments, we prove that the central metal ion is coordinated to the terpyridine moieties in a pseudo-octahedral coordination environment. The Fe-N bond distances are 1.82 and 2.0 A, respectively. Temperature resolved measurements indicate a reversible phase transition in a temperature range up to 55 degrees C. EXAFS measurements indicate a lengthening of the average Fe-N bond distance from 1.91 to 1.95 A. The widening of the coordination cage upon heating is expected to lower the ligand field stabilization, thus giving rise to spin transitions in these composite materials.
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Affiliation(s)
- Y Bodenthin
- University Potsdam, Department of Physics, P.O. Box 601553, D-14415 Potsdam, Germany, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany.
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47
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Solvation of iron(II) complexes of hexadentate tris-diimine Schiff base tripod ligands in alcohol?water and DMSO?water mixtures. TRANSIT METAL CHEM 2005. [DOI: 10.1007/s11243-004-2233-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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48
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Uppadine LH, Gisselbrecht JP, Kyritsakas N, Nättinen K, Rissanen K, Lehn JM. Mixed-Valence, Mixed-Spin-State, and Heterometallic [2×2] Grid-type Arrays Based on Heteroditopic Hydrazone Ligands: Synthesis and Electrochemical Features. Chemistry 2005; 11:2549-65. [PMID: 15729682 DOI: 10.1002/chem.200401224] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
An extended family of heterometallic [(M1)2(M2)2(L-)4](n+) [2x2] grid-type arrays 1-9 has been prepared. The three-tiered synthetic route encompasses regioselective, redox and enantioselective features and is based on the stepwise construction of heteroditopic hydrazone ligands A-C. These ligands contain ionisable NH and nonionisable NMe hydrazone units, which allows the metal redox properties to be controlled according to the charge on the ligand binding pocket. The 2-pyrimidine (R) and 6-pyridine (R') substituents have a significant effect on complex geometry and influence both the electrochemical and magnetic behaviour of the system. 1H NMR spectroscopic studies show that the Fe(II) ions in the grid can be low spin, high spin or spin crossover depending on the steric effect of substituents R and R'. This steric effect has been manipulated to construct an unusual array possessing two low-spin and two spin-crossover Fe(II) centres (grid 8). Electrochemical studies were performed for the grid-type arrays 1-9 and their respective mononuclear precursor complexes 10-13. The grids function as electron reservoirs and display up to eight monoelectronic, reversible reduction steps. These processes generally occur in pairs and are assigned to ligand-based reductions and to the Co(III)/Co(II) redox couple. Individual metal ions in the heterometallic grid motif can be selectively addressed electrochemically (e.g., either the Co(III) or Fe(II) ions can be targeted in grids 2 and 5). The Fe(II) oxidation potential is governed by the charge on the ligand binding unit, rather than the spin state, thus permitting facile electrochemical discrimination between the two types of Fe(II) centre in 7 or in 8. Such multistable heterometallic [2x2] gridlike arrays are of great interest for future supramolecular devices incorporating multilevel redox activity.
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Affiliation(s)
- Lindsay H Uppadine
- ISIS, Université Louis Pasteur, CNRS UMR 7006, BP 70028, 67083 Strasbourg, France
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49
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Bodenthin Y, Pietsch U, Möhwald H, Kurth DG. Inducing Spin Crossover in Metallo-supramolecular Polyelectrolytes through an Amphiphilic Phase Transition. J Am Chem Soc 2005; 127:3110-4. [PMID: 15740150 DOI: 10.1021/ja0447210] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A phase transition in an amphiphilic mesophase is explored to deliberately induce mechanical strain in an assembly of tightly coupled metal ion coordination centers. Melting of the alkyl chains in the amphiphilic mesophase causes distortion of the coordination geometry around the central transition metal ion. As a result, the crystal field splitting of the d-orbital subsets decreases resulting in a spin transition from a low-spin to a high-spin state. The diamagnetic-paramagnetic transition is reversible. This concept is demonstrated in a metallo-supramolecular coordination polyelectrolyte-amphiphile complex self-assembled from ditopic bis-terpyridines, Fe(II) as central transition metal, and dialkyl phosphates as amphiphiles. The magnetic properties are studied in a Langmuir-Blodgett multilayer. The modularity of this concept provides extensive control of structure and function from molecular to macroscopic length scales and gives access to a wide range of new molecular magnetic architectures such as nanostructures, thin films, and liquid crystals.
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Affiliation(s)
- Yves Bodenthin
- Department of Physics, University of Potsdam, D-14424 Potsdam, Germany, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany.
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50
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McMurtrie J, Dance I. Engineering grids of metal complexes: development of the 2D M(terpy)2 embrace motif in crystals. CrystEngComm 2005. [DOI: 10.1039/b500289c] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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