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Landart Gereka A, Quesada-Moreno MM, Díaz-Ortega IF, Nojiri H, Ozerov M, Krzystek J, Palacios MA, Colacio E. Large easy-axis magnetic anisotropy in a series of trigonal prismatic mononuclear cobalt (II) complexes with zero-field hidden single-molecule magnet behaviour: The important role of the distortion of the coordination sphere and intermolecular interactions on the slow relaxation. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00275b] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The complexes [Co(L)]X·S (X = CoCl42- , S = CH3CN (1); X = ZnCl42- , S = CH3OH (2)), [Co(L)]X2·S (X = ClO4-, S = 2CH3OH (3) and X =...
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2
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Naumova MA, Kalinko A, Wong JWL, Alvarez Gutierrez S, Meng J, Liang M, Abdellah M, Geng H, Lin W, Kubicek K, Biednov M, Lima F, Galler A, Zalden P, Checchia S, Mante PA, Zimara J, Schwarzer D, Demeshko S, Murzin V, Gosztola D, Jarenmark M, Zhang J, Bauer M, Lawson Daku ML, Khakhulin D, Gawelda W, Bressler C, Meyer F, Zheng K, Canton SE. Exploring the light-induced dynamics in solvated metallogrid complexes with femtosecond pulses across the electromagnetic spectrum. J Chem Phys 2020; 152:214301. [PMID: 32505143 DOI: 10.1063/1.5138641] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Oligonuclear complexes of d4-d7 transition metal ion centers that undergo spin-switching have long been developed for their practical role in molecular electronics. Recently, they also have appeared as promising photochemical reactants demonstrating improved stability. However, the lack of knowledge about their photophysical properties in the solution phase compared to mononuclear complexes is currently hampering their inclusion into advanced light-driven reactions. In the present study, the ultrafast photoinduced dynamics in a solvated [2 × 2] iron(II) metallogrid complex are characterized by combining measurements with transient optical-infrared absorption and x-ray emission spectroscopy on the femtosecond time scale. The analysis is supported by density functional theory calculations. The photocycle can be described in terms of intra-site transitions, where the FeII centers in the low-spin state are independently photoexcited. The Franck-Condon state decays via the formation of a vibrationally hot high-spin (HS) state that displays coherent behavior within a few picoseconds and thermalizes within tens of picoseconds to yield a metastable HS state living for several hundreds of nanoseconds. Systematic comparison with the closely related mononuclear complex [Fe(terpy)2]2+ reveals that nuclearity has a profound impact on the photoinduced dynamics. More generally, this work provides guidelines for expanding the integration of oligonuclear complexes into new photoconversion schemes that may be triggered by ultrafast spin-switching.
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Affiliation(s)
- Maria A Naumova
- Deutsches Elektronen Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Aleksandr Kalinko
- Deutsches Elektronen Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Joanne W L Wong
- Universität Göttingen, Institut für Anorganische Chemie, Tammannstraße 4, 37077 Göttingen, Germany
| | - Sol Alvarez Gutierrez
- Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Jie Meng
- Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Mingli Liang
- Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Mohamed Abdellah
- Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden
| | - Huifang Geng
- ELI-ALPS, ELI-HU Non-Profit Ltd., Dugonics ter 13, Szeged 6720, Hungary
| | - Weihua Lin
- Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden
| | | | | | | | | | - Peter Zalden
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | | | | | - Jennifer Zimara
- Department of Dynamics at Surfaces, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Dirk Schwarzer
- Department of Dynamics at Surfaces, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Serhiy Demeshko
- Universität Göttingen, Institut für Anorganische Chemie, Tammannstraße 4, 37077 Göttingen, Germany
| | - Vadim Murzin
- Deutsches Elektronen Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - David Gosztola
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | | | - Jianxin Zhang
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
| | - Matthias Bauer
- Department Chemie and Center for Sustainable Systems Design (CSSD), University of Paderborn, Warburger Straße 100, D-33098 Paderborn, Germany
| | - Max Latevi Lawson Daku
- Département de Chimie Physique, Université de Genève, Quai E. Ansermet 30, CH-1211 Genève 4, Switzerland
| | | | | | | | - Franc Meyer
- Universität Göttingen, Institut für Anorganische Chemie, Tammannstraße 4, 37077 Göttingen, Germany
| | - Kaibo Zheng
- Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Sophie E Canton
- Deutsches Elektronen Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
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Qiu YR, Cui L, Cai PY, Yu F, Kurmoo M, Leong CF, D'Alessandro DM, Zuo JL. Enhanced dielectricity coupled to spin-crossover in a one-dimensional polymer iron(ii) incorporating tetrathiafulvalene. Chem Sci 2020; 11:6229-6235. [PMID: 32953018 PMCID: PMC7480181 DOI: 10.1039/d0sc02388d] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 05/27/2020] [Indexed: 11/21/2022] Open
Abstract
A concerted bending–flattening motion of the redox-active TTF within constructed one-dimensional FeII–TTF–Schiff-base chain with bridging 4,4′-bpy enhances the dielectric constant coupled to its spin-crossover transition above room temperature.
In designing multifunctional materials for potential switches that can be used as memory devices, the high-spin (HS) to low-spin (LS) crossover (SCO) one-dimensional polymer, [FeII(L)(4,4′-bpy)]n, was constructed from a designed redox-active tetrathiafulvalene (TTF) functionalized Schiff-base and the ditopic linker 4,4′-bipyridine (bpy). It exhibits an 8 K hysteretic SCO centred at T1/2 = 325 K which is coupled to changes in its dielectric constant. The crystal structures above and below the transition temperature reveal similar parallel linear ···Fe–bpy–Fe–bpy··· chains displaying expansion of the FeII octahedron in the HS state. Density functional theory (DFT) calculations reveal a concerted electronic charge and spin change represented by the Mülliken charge of the Fe and the magnitude and direction of the dipole moment which substantiate the experimental observations.
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Affiliation(s)
- Ya-Ru Qiu
- State Key Laboratory of Coordination Chemistry , School of Chemistry and Chemical Engineering , Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210023 , P. R. China .
| | - Long Cui
- State Key Laboratory of Coordination Chemistry , School of Chemistry and Chemical Engineering , Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210023 , P. R. China .
| | - Pei-Yu Cai
- State Key Laboratory of Coordination Chemistry , School of Chemistry and Chemical Engineering , Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210023 , P. R. China .
| | - Fei Yu
- State Key Laboratory of Coordination Chemistry , School of Chemistry and Chemical Engineering , Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210023 , P. R. China . .,School of Chemistry and Materials Science , Nanjing University of Information Science and Technology , Nanjing , 210044 , P. R. China
| | - Mohamedally Kurmoo
- State Key Laboratory of Coordination Chemistry , School of Chemistry and Chemical Engineering , Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210023 , P. R. China . .,Institut de Chimie de Strasbourg , CNRS-UMR7177 , Université de Strasbourg , 4 rue Blaise Pascal , Strasbourg 67000 , France .
| | - Chanel F Leong
- School of Chemistry , The University of Sydney , Sydney , New South Wales 2006 , Australia
| | - Deanna M D'Alessandro
- School of Chemistry , The University of Sydney , Sydney , New South Wales 2006 , Australia
| | - Jing-Lin Zuo
- State Key Laboratory of Coordination Chemistry , School of Chemistry and Chemical Engineering , Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210023 , P. R. China .
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Naumova MA, Kalinko A, Wong JWL, Abdellah M, Geng H, Domenichini E, Meng J, Gutierrez SA, Mante PA, Lin W, Zalden P, Galler A, Lima F, Kubicek K, Biednov M, Britz A, Checchia S, Kabanova V, Wulff M, Zimara J, Schwarzer D, Demeshko S, Murzin V, Gosztola D, Jarenmark M, Zhang J, Bauer M, Lawson Daku ML, Gawelda W, Khakhulin D, Bressler C, Meyer F, Zheng K, Canton SE. Revealing Hot and Long-Lived Metastable Spin States in the Photoinduced Switching of Solvated Metallogrid Complexes with Femtosecond Optical and X-ray Spectroscopies. J Phys Chem Lett 2020; 11:2133-2141. [PMID: 32069410 DOI: 10.1021/acs.jpclett.9b03883] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
An atomistic understanding of the photoinduced spin-state switching (PSS) within polynuclear systems of d4-d7 transition metal ion complexes is required for their rational integration into light-driven reactions of chemical and biological interest. However, in contrast to mononuclear systems, the multidimensional dynamics of the PSS in solvated molecular arrays have not yet been elucidated due to the expected complications associated with the connectivity between the metal centers and the strong interactions with the surroundings. In this work, the PSS in a solvated triiron(II) metallogrid complex is characterized using transient optical absorption and X-ray emission spectroscopies on the femtosecond time scale. The complementary measurements reveal the photoinduced creation of energy-rich (hot) and long-lived quintet states, whose dynamics differ critically from their mononuclear congeners. This finding opens major prospects for developing novel schemes in solution-phase spin chemistry that are driven by the dynamic PSS process in compact oligometallic arrays.
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Affiliation(s)
- Maria A Naumova
- Deutsches Elektronen Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Aleksandr Kalinko
- Deutsches Elektronen Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
- Department Chemie and Center for Sustainable Systems Design (CSSD), University of Paderborn, Warburger Straße 100, D-33098 Paderborn, Germany
| | - Joanne W L Wong
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| | - Mohamed Abdellah
- Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden
- Department of Chemistry, Qena Faculty of Science, South Valley University, 83523 Qena, Egypt
| | - Huifang Geng
- ELI-ALPS, ELI-HU Non-Profit Ltd., Dugonics ter 13, Szeged 6720, Hungary
| | | | - Jie Meng
- Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Sol Alvarez Gutierrez
- Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Pierre-Adrien Mante
- Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden
- Department of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Weihua Lin
- Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden
| | - Peter Zalden
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
| | | | | | | | | | | | | | - Victoria Kabanova
- European Synchrotron Radiation Facility (ESRF), 38000 Grenoble Cedex 9, France
| | - Michael Wulff
- European Synchrotron Radiation Facility (ESRF), 38000 Grenoble Cedex 9, France
| | - Jennifer Zimara
- Department of Dynamics at Surfaces, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Dirk Schwarzer
- Department of Dynamics at Surfaces, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Serhiy Demeshko
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| | - Vadim Murzin
- Deutsches Elektronen Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
- Bergische Universität Wuppertal, Gaußstraße 20, 42119 Wuppertal, Germany
| | - David Gosztola
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | | | - Jianxin Zhang
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes, School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
| | - Matthias Bauer
- Department Chemie and Center for Sustainable Systems Design (CSSD), University of Paderborn, Warburger Straße 100, D-33098 Paderborn, Germany
| | - Max Latevi Lawson Daku
- Département de Chimie Physique, Université de Genève, Quai E. Ansermet 30, CH-1211 Genève 4, Switzerland
| | - Wojciech Gawelda
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
- Faculty of Physics, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 2, 61-614 Poznań, Poland
| | | | - Christian Bressler
- European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
- The Hamburg Centre for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Franc Meyer
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| | - Kaibo Zheng
- Chemical Physics and NanoLund, Lund University, Box 124, 22100 Lund, Sweden
- Department of Chemistry, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Sophie E Canton
- Deutsches Elektronen Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
- ELI-ALPS, ELI-HU Non-Profit Ltd., Dugonics ter 13, Szeged 6720, Hungary
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Petzold H, Hörner G, Schnaubelt L, Rüffer T. Slow spin crossover in bis-meridional Fe 2+ complexes through spin-state auto-adaptive N6/N8 coordination. Dalton Trans 2018; 47:17257-17265. [PMID: 30488935 DOI: 10.1039/c8dt03652g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Fe2+ spin crossover (SCO) complexes with long-lived excited high-spin (HS) states are promising molecular switches. An enhanced kinetic stability of spin-state isomers can be expected to foster applications beyond the limits of cooperative SCO. In this study, we describe a new approach to slow down the spin-state exchange by simple commutation of a phenyl substituent by a pyridyl substituent. To this end, N4 ligand 6-(3-(pyridin-2-yl)-1H-pyrazol-1-yl)-2,2'-bipyridine (3b) is synthesized as an N4 homologue of the well-established meridional N3 ligands motif. Phenyl-substituted 6-(3-phenyl-1H-pyrazol-1-yl)-2,2'-bipyridine (3a) serves as an intrinsic N3 reference throughout. 3b offers variable coordination numbers, N3 versus N3(+1) and N4, reflecting the preferences of the metal center. As is shown herein through an extended solid-state structure-chemical and solution-state NMR study, which is augmented by density-functional theory modeling, both the coordination geometry and its structural dynamics are indeed highly sensitive towards the expansion of the nominal donor number. The additional donors in 3b introduced through the phenyl-pyridine commutation actually give rise to a rich and diverse stereochemistry of the derived Zn2+ and Fe2+ complexes. Notably, even within a single complex unit coordination of 3b ranges from strongly distorted N3 coordination with a long assisting additional contact (Zn2+ and Fe2+) to a more symmetric N2(+2) or N4 situation in Fe2+. DFT modeling unravels that the additional donors are hemi-labile and coordinate to the Fe2+ only in HS state, leaving the elusive low-spin (LS) state in a fairly undisturbed octahedral environment with 3b being N3 coordinate. That is, the coordination number of the complex autogeneously responds to the altered spin-state. Necessarily this switch in coordination number requires strong structural changes upon SCO. This leads to increased activation barriers for SCO as could be deduced from a temperature-dependent analysis of the dynamic 1H NMR-line broadening and corroborated by accompanying theoretical analysis of the SCO reaction coordinate. For [Fe(3b)2]2+ long spin-state lifetimes τ > 1 ms prevail below the characteristic temperature T (1 ms) = 235 K; this value should be compared with a lifetime of only 150 ns derived for the close analogue [Fe(3a)2]2+. The principle applied herein is general and allows transferring of LS Fe2+ complexes with suitably placed phenyl substituents into SCO complexes with spin-state adaptive coordination number and hence long-lived HS excited states.
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Affiliation(s)
- Holm Petzold
- TU Chemnitz, Institut für Chemie, Anorganische Chemie, Straße der Nationen 62, 09111 Chemnitz, Germany.
| | - Gerald Hörner
- TU Berlin, Institut für Chemie, Straße des 17. Juni 135, 10623 Berlin, Germany.
| | - Linda Schnaubelt
- TU Chemnitz, Institut für Chemie, Anorganische Chemie, Straße der Nationen 62, 09111 Chemnitz, Germany.
| | - Tobias Rüffer
- TU Chemnitz, Institut für Chemie, Anorganische Chemie, Straße der Nationen 62, 09111 Chemnitz, Germany.
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Burzurí E, García-Fuente A, García-Suárez V, Senthil Kumar K, Ruben M, Ferrer J, van der Zant HSJ. Spin-state dependent conductance switching in single molecule-graphene junctions. Nanoscale 2018; 10:7905-7911. [PMID: 29682641 DOI: 10.1039/c8nr00261d] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Spin-crossover (SCO) molecules are versatile magnetic switches with applications in molecular electronics and spintronics. Downscaling devices to the single-molecule level remains, however, a challenging task since the switching mechanism in bulk is mediated by cooperative intermolecular interactions. Here, we report on electron transport through individual Fe-SCO molecules coupled to few-layer graphene electrodes via π-π stacking. We observe a distinct bistability in the conductance of the molecule and a careful comparison with density functional theory (DFT) calculations allows to associate the bistability with a SCO-induced orbital reconfiguration of the molecule. We find long spin-state lifetimes that are caused by the specific coordination of the magnetic core and the absence of intermolecular interactions according to our calculations. In contrast with bulk samples, the SCO transition is not triggered by temperature but induced by small perturbations in the molecule at any temperature. We propose plausible mechanisms that could trigger the SCO at the single-molecule level.
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Affiliation(s)
- Enrique Burzurí
- Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA Delft, The Netherlands
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7
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Petzold H, Djomgoue P, Hörner G, Lochenie C, Weber B, Rüffer T. Bis-meridional Fe2+ spincrossover complexes of phenyl and pyridyl substituted 2-(pyridin-2-yl)-1,10-phenanthrolines. Dalton Trans 2018; 47:491-506. [DOI: 10.1039/c7dt02320k] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Fe2+ spincrossover complexes [Fe(L)2]2+ (L = substituted (pyridin-2-yl)-1,10-phenanthroline) were prepared and SCO with changing coordination numbers was identified by 1H NMR spectroscopy and in silico modeling.
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Affiliation(s)
- Holm Petzold
- TU Chemnitz
- Institut für Chemie
- Anorganische Chemie
- 09111 Chemnitz
- Germany
| | - Paul Djomgoue
- TU Chemnitz
- Institut für Chemie
- Anorganische Chemie
- 09111 Chemnitz
- Germany
| | | | - Charles Lochenie
- Anorganische Chemie II
- Universität Bayreuth
- 95440 Bayreuth
- Germany
- Institut de science et d'ingénierie supramoléculaires (ISIS)
| | - Birgit Weber
- Anorganische Chemie II
- Universität Bayreuth
- 95440 Bayreuth
- Germany
| | - Tobias Rüffer
- TU Chemnitz
- Institut für Chemie
- Anorganische Chemie
- 09111 Chemnitz
- Germany
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Mörtel M, Witt A, Heinemann FW, Bochmann S, Bachmann J, Khusniyarov MM. Synthesis, Characterization, and Properties of Iron(II) Spin-Crossover Molecular Photoswitches Functioning at Room Temperature. Inorg Chem 2017; 56:13174-13186. [DOI: 10.1021/acs.inorgchem.7b01952] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Max Mörtel
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Alexander Witt
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Frank W. Heinemann
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Sebastian Bochmann
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Julien Bachmann
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Marat M. Khusniyarov
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
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Zhang X, Costa PS, Hooper J, Miller DP, N'Diaye AT, Beniwal S, Jiang X, Yin Y, Rosa P, Routaboul L, Gonidec M, Poggini L, Braunstein P, Doudin B, Xu X, Enders A, Zurek E, Dowben PA. Locking and Unlocking the Molecular Spin Crossover Transition. Adv Mater 2017; 29:1702257. [PMID: 28846811 DOI: 10.1002/adma.201702257] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 06/19/2017] [Indexed: 06/07/2023]
Abstract
The Fe(II) spin crossover complex [Fe{H2 B(pz)2 }2 (bipy)] (pz = pyrazol-1-yl, bipy = 2,2'-bipyridine) can be locked in a largely low-spin-state configuration over a temperature range that includes temperatures well above the thermal spin crossover temperature of 160 K. This locking of the spin state is achieved for nanometer thin films of this complex in two distinct ways: through substrate interactions with dielectric substrates such as SiO2 and Al2 O3 , or in powder samples by mixing with the strongly dipolar zwitterionic p-benzoquinonemonoimine C6 H2 (-⋯ NH2 )2 (-⋯ O)2 . Remarkably, it is found in both cases that incident X-ray fluences then restore the [Fe{H2 B(pz)2 }2 (bipy)] moiety to an electronic state characteristic of the high spin state at temperatures of 200 K to above room temperature; that is, well above the spin crossover transition temperature for the pristine powder, and well above the temperatures characteristic of light- or X-ray-induced excited-spin-state trapping. Heating slightly above room temperature allows the initial locked state to be restored. These findings, supported by theory, show how the spin crossover transition can be manipulated reversibly around room temperature by appropriate design of the electrostatic and chemical environment.
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Affiliation(s)
- Xin Zhang
- Department of Physics and Astronomy, University of Nebraska, Lincoln, NE, 68588-0299, USA
| | - Paulo S Costa
- Department of Physics and Astronomy, University of Nebraska, Lincoln, NE, 68588-0299, USA
| | - James Hooper
- Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, Krakow, 30-060, Poland
| | - Daniel P Miller
- Department of Chemistry, University of Buffalo, Buffalo, NY, 14260-3000, USA
| | - Alpha T N'Diaye
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Sumit Beniwal
- Department of Physics and Astronomy, University of Nebraska, Lincoln, NE, 68588-0299, USA
| | - Xuanyuan Jiang
- Department of Physics and Astronomy, University of Nebraska, Lincoln, NE, 68588-0299, USA
| | - Yuewei Yin
- Department of Physics and Astronomy, University of Nebraska, Lincoln, NE, 68588-0299, USA
| | - Patrick Rosa
- CNRS, Univ. Bordeaux, ICMCB, UPR 9048, F-33600, Pessac, France
| | - Lucie Routaboul
- Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Chimie de Coordination, 4 rue Blaise Pascal, 67081, Strasbourg, France
| | - Mathieu Gonidec
- CNRS, Univ. Bordeaux, ICMCB, UPR 9048, F-33600, Pessac, France
| | - Lorenzo Poggini
- CNRS, Univ. Bordeaux, ICMCB, UPR 9048, F-33600, Pessac, France
| | - Pierre Braunstein
- Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Chimie de Coordination, 4 rue Blaise Pascal, 67081, Strasbourg, France
| | - Bernard Doudin
- University of Strasbourg, CNRS, IPCMS UMR 7504, 23 rue du Loess, 67034, Strasbourg, France
| | - Xiaoshan Xu
- Department of Physics and Astronomy, University of Nebraska, Lincoln, NE, 68588-0299, USA
| | - Axel Enders
- Department of Physics and Astronomy, University of Nebraska, Lincoln, NE, 68588-0299, USA
- Physikalisches Institut, Universität Bayreuth, 95440, Bayreuth, Germany
| | - Eva Zurek
- Department of Chemistry, University of Buffalo, Buffalo, NY, 14260-3000, USA
| | - Peter A Dowben
- Department of Physics and Astronomy, University of Nebraska, Lincoln, NE, 68588-0299, USA
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Stock P, Wiedemann D, Petzold H, Hörner G. Structural Dynamics of Spin Crossover in Iron(II) Complexes with Extended-Tripod Ligands. Inorganics 2017; 5:60. [DOI: 10.3390/inorganics5030060] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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11
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Petzold H, Djomgoue P, Hörner G, Heider S, Lochenie C, Weber B, Rüffer T, Schaarschmidt D. Spin state variability in Fe2+ complexes of substituted (2-(pyridin-2-yl)-1,10-phenanthroline) ligands as versatile terpyridine analogues. Dalton Trans 2017; 46:6218-6229. [DOI: 10.1039/c7dt00422b] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fe2+ spin crossover complexes [Fe(L)2]2+ (L = substituted (pyridin-2-yl)-1,10-phenanthroline) were prepared and SCO properties were investigated in solution and in the solid state by an experiment and in silico.
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Affiliation(s)
- Holm Petzold
- TU Chemnitz
- Institut für Chemie
- Anorganische Chemie
- 09111 Chemnitz
- Germany
| | - Paul Djomgoue
- TU Chemnitz
- Institut für Chemie
- Anorganische Chemie
- 09111 Chemnitz
- Germany
| | | | - Silvio Heider
- TU Chemnitz
- Institut für Chemie
- Anorganische Chemie
- 09111 Chemnitz
- Germany
| | - Charles Lochenie
- Institut de science et d'ingénierie supramoléculaires (ISIS)
- Université de Strasbourg & CNRS
- 67000 Strasbourg
- France
| | - Birgit Weber
- Anorganische Chemie II
- Universität Bayreuth
- 95440 Bayreuth
- Germany
| | - Tobias Rüffer
- TU Chemnitz
- Institut für Chemie
- Anorganische Chemie
- 09111 Chemnitz
- Germany
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12
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Affiliation(s)
- Marat M. Khusniyarov
- Department of Chemistry and Pharmacy; Friedrich-Alexander University Erlangen-Nürnberg (FAU); Egerlandstr. 1 91058 Erlangen Germany
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Petzold H, Djomgoue P, Hörner G, Speck JM, Rüffer T, Schaarschmidt D. (1)H NMR spectroscopic elucidation in solution of the kinetics and thermodynamics of spin crossover for an exceptionally robust Fe(2+) complex. Dalton Trans 2016; 45:13798-809. [PMID: 27506162 DOI: 10.1039/c6dt01895e] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of Fe(2+) spin crossover (SCO) complexes [Fe(5/6)](2+) employing hexadentate ligands (5/6) with cis/trans-1,2-diamino cyclohexanes (4) as central building blocks were synthesised. The ligands were obtained by reductive amination of 4 with 2,2'-bipyridyl-6-carbaldehyde or 1,10-phenanthroline-2-carbaldehyde 3. The chelating effect and the rigid structure of the ligands 5/6 lead to exceptionally robust Fe(2+) and Zn(2+) complexes conserving their structure even in coordinating solvents like dmso at high temperatures. Their solution behavior was investigated using variable temperature (VT) (1)H NMR spectroscopy and VT Vis spectroscopy. SCO behavior was found for all Fe(2+) complexes in this series centred around and far above room temperature. For the first time we have demonstrated that the thermodynamics as well as kinetics for SCO can be deduced by using VT (1)H NMR spectroscopy. An alternative scheme using a linear correction term C(1) to model chemical shifts for Fe(2+) SCO complexes is presented. The rate constant for the SCO of [Fe(rac-trans-5)](2+) obtained by VT (1)H NMR was validated by Laser Flash Photolysis (LFP), with excellent agreement (1/(kHL + kLH) = 33.7/35.8 ns for NMR/LFP). The solvent dependence of the transition temperature T1/2 and the solvatochromism of complex [Fe(rac-trans-5)](2+) were ascribed to hydrogen bond formation of the secondary amine to the solvent. Enantiomerically pure complexes can be prepared starting with R,R- or S,S-1,2-diaminocyclohexane (R,R-trans-4 or S,S-trans-4). The high robustness of the complexes reduces a possible ligand scrambling and allows preparation of quasiracemic crystals of [Zn(R,R-5)][Fe(S,S-5)](ClO4)4·(CH3CN) composed of a 1 : 1 mixture of the Zn and Fe complexes with inverse chirality.
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Affiliation(s)
- Holm Petzold
- TU Chemnitz, Institut für Chemie, Anorganische Chemie, Straße der Nationen 62, 09111 Chemnitz, Germany.
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14
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Stock P, Deck E, Hohnstein S, Korzekwa J, Meyer K, Heinemann FW, Breher F, Hörner G. Molecular Spin Crossover in Slow Motion: Light-Induced Spin-State Transitions in Trigonal Prismatic Iron(II) Complexes. Inorg Chem 2016; 55:5254-65. [PMID: 27159332 DOI: 10.1021/acs.inorgchem.6b00238] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A straightforward access is provided to iron(II) complexes showing exceedingly slow spin-state interconversion by utilizing trigonal-prismatic directing ligands (L(n)) of the extended-tripod type. A detailed analysis of the interrelations between complex structure (X-ray diffraction, density functional theory) and electronic character (SQUID magnetometry, Mössbauer spectroscopy, UV/vis spectroscopy) of the iron(II) center in mononuclear complexes [FeL(n)] reveals spin crossover to occur along a coupled breathing/torsion reaction coordinate, shuttling the complex between the octahedral low-spin state and the trigonal-prismatic high-spin state along Bailar's trigonal twist pathway. We associate both the long spin-state lifetimes in the millisecond domain close to room temperature and the substantial barriers against thermal scrambling (Ea ≈ 33 kJ mol(-1), from Arrhenius analysis) with stereochemical constraints. In particular, the topology of the κ(6)N ligands controls the temporary and structural dynamics during spin crossover.
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Affiliation(s)
- Philipp Stock
- Institut für Chemie, Technische Universität Berlin , Strasse des 17. Juni 135, 10623 Berlin, Germany
| | - Eva Deck
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT) , Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Silvia Hohnstein
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT) , Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Jana Korzekwa
- Department Chemie und Pharmazie, Anorganische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerlandstraße 1, 91058 Erlangen, Germany
| | - Karsten Meyer
- Department Chemie und Pharmazie, Anorganische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerlandstraße 1, 91058 Erlangen, Germany
| | - Frank W Heinemann
- Department Chemie und Pharmazie, Anorganische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerlandstraße 1, 91058 Erlangen, Germany
| | - Frank Breher
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT) , Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Gerald Hörner
- Institut für Chemie, Technische Universität Berlin , Strasse des 17. Juni 135, 10623 Berlin, Germany
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15
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Dankhoff K, Lochenie C, Puchtler F, Weber B. Solvent Influence on the Magnetic Properties of Iron(II) Spin-Crossover Coordination Compounds with 4,4′-Dipyridylethyne as Linker. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501175] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Kroll N, Theilacker K, Schoknecht M, Baabe D, Wiedemann D, Kaupp M, Grohmann A, Hörner G. Controlled ligand distortion and its consequences for structure, symmetry, conformation and spin-state preferences of iron(II) complexes. Dalton Trans 2015; 44:19232-47. [PMID: 26488906 DOI: 10.1039/c5dt02502h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ligand-field strength in metal complexes of polydentate ligands depends critically on how the ligand backbone places the donor atoms in three-dimensional space. Distortions from regular coordination geometries are often observed. In this work, we study the isolated effect of ligand-sphere distortion by means of two structurally related pentadentate ligands of identical donor set, in the solid state (X-ray diffraction, (57)Fe-Mössbauer spectroscopy), in solution (NMR spectroscopy, UV/Vis spectroscopy, conductometry), and with quantum-chemical methods. Crystal structures of hexacoordinate iron(II) and nickel(II) complexes derived from the cyclic ligand L(1) (6-methyl-6-(pyridin-2-yl)-1,4-bis(pyridin-2-ylmethyl)-1,4-diazepane) and its open-chain congener L(2) (N(1),N(3),2-trimethyl-2-(pyridine-2-yl)-N(1),N(3)-bis(pyridine-2-ylmethyl) propane-1,3-diamine) reveal distinctly different donor set distortions reflecting the differences in ligand topology. Distortion from regular octahedral geometry is minor for complexes of ligand L(2), but becomes significant in the complexes of the cyclic ligand L(1), where trans elongation of Fe-N bonds cannot be compensated by the rigid ligand backbone. This provokes trigonal twisting of the ligand field. This distortion causes the metal ion in complexes of L(1) to experience a significantly weaker ligand field than in the complexes of L(2), which are more regular. The reduced ligand-field strength in complexes of L(1) translates into a marked preference for the electronic high-spin state, the emergence of conformational isomers, and massively enhanced lability with respect to ligand exchange and oxidation of the central ion. Accordingly, oxoiron(IV) species derived from L(1) and L(2) differ in their spectroscopic properties and their chemical reactivity.
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Affiliation(s)
- Nicole Kroll
- Technische Universität Berlin, Institut für Chemie, Sekr. C2, Straße des 17. Juni 135, 10623 Berlin, Germany.
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17
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Rösner B, Milek M, Witt A, Gobaut B, Torelli P, Fink RH, Khusniyarov MM. Reversible Photoswitching of a Spin‐Crossover Molecular Complex in the Solid State at Room Temperature. Angew Chem Int Ed Engl 2015; 54:12976-80. [DOI: 10.1002/anie.201504192] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 08/11/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Benedikt Rösner
- Department of Chemistry and Pharmacy, Friedrich‐Alexander University of Erlangen‐Nuremberg, Egerlandstrasse 1–3, 91058 Erlangen (Germany) http://chemie.fau.de/khusniyarov
| | - Magdalena Milek
- Department of Chemistry and Pharmacy, Friedrich‐Alexander University of Erlangen‐Nuremberg, Egerlandstrasse 1–3, 91058 Erlangen (Germany) http://chemie.fau.de/khusniyarov
| | - Alexander Witt
- Department of Chemistry and Pharmacy, Friedrich‐Alexander University of Erlangen‐Nuremberg, Egerlandstrasse 1–3, 91058 Erlangen (Germany) http://chemie.fau.de/khusniyarov
| | - Benoît Gobaut
- Sincrotrone Trieste S.C.p.A., S.S. 14 km 163.5, Area Science Park, 34149 Trieste (Italy)
| | - Piero Torelli
- Laboratorio TASC, IOM‐CNR, S.S. 14 km 163.5, Basovizza, 34149 Trieste (Italy)
| | - Rainer H. Fink
- Department of Chemistry and Pharmacy, Friedrich‐Alexander University of Erlangen‐Nuremberg, Egerlandstrasse 1–3, 91058 Erlangen (Germany) http://chemie.fau.de/khusniyarov
| | - Marat M. Khusniyarov
- Department of Chemistry and Pharmacy, Friedrich‐Alexander University of Erlangen‐Nuremberg, Egerlandstrasse 1–3, 91058 Erlangen (Germany) http://chemie.fau.de/khusniyarov
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18
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Rösner B, Milek M, Witt A, Gobaut B, Torelli P, Fink RH, Khusniyarov MM. Reversible Photoswitching of a Spin-Crossover Molecular Complex in the Solid State at Room Temperature. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504192] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Stock P, Spintig N, Scholz J, Epping JD, Oelsner C, Wiedemann D, Grohmann A, Hörner G. Spin-state dynamics of a photochromic iron(II) complex and its immobilization on oxide surfaces via phenol anchors. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1066778] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Philipp Stock
- Institut für Chemie, Technische Universität Berlin, Berlin, Germany
- Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany
| | - Nicole Spintig
- Institut für Chemie, Technische Universität Berlin, Berlin, Germany
| | - Juliane Scholz
- Institut für Chemie, Technische Universität Berlin, Berlin, Germany
| | - Jan Dirk Epping
- Institut für Chemie, Technische Universität Berlin, Berlin, Germany
| | - Christian Oelsner
- Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Dennis Wiedemann
- Institut für Chemie, Technische Universität Berlin, Berlin, Germany
| | - Andreas Grohmann
- Institut für Chemie, Technische Universität Berlin, Berlin, Germany
| | - Gerald Hörner
- Institut für Chemie, Technische Universität Berlin, Berlin, Germany
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Lochenie C, Bauer W, Railliet AP, Schlamp S, Garcia Y, Weber B. Large Thermal Hysteresis for Iron(II) Spin Crossover Complexes with N-(Pyrid-4-yl)isonicotinamide. Inorg Chem 2014; 53:11563-72. [DOI: 10.1021/ic501624b] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Charles Lochenie
- Inorganic Chemistry II, Universität Bayreuth, Universitätsstrasse
30, NW I, 95440 Bayreuth, Germany
- Insitute of Condensed Matter
and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Wolfgang Bauer
- Inorganic Chemistry II, Universität Bayreuth, Universitätsstrasse
30, NW I, 95440 Bayreuth, Germany
| | - Antoine P. Railliet
- Insitute of Condensed Matter
and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Stephan Schlamp
- Inorganic Chemistry II, Universität Bayreuth, Universitätsstrasse
30, NW I, 95440 Bayreuth, Germany
| | - Yann Garcia
- Insitute of Condensed Matter
and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Birgit Weber
- Inorganic Chemistry II, Universität Bayreuth, Universitätsstrasse
30, NW I, 95440 Bayreuth, Germany
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Company A, Sabenya G, González-Béjar M, Gómez L, Clémancey M, Blondin G, Jasniewski AJ, Puri M, Browne WR, Latour JM, Que L, Costas M, Pérez-Prieto J, Lloret-Fillol J. Triggering the generation of an iron(IV)-oxo compound and its reactivity toward sulfides by Ru(II) photocatalysis. J Am Chem Soc 2014; 136:4624-33. [PMID: 24568126 PMCID: PMC3985778 DOI: 10.1021/ja412059c] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
![]()
The
preparation of [FeIV(O)(MePy2tacn)]2+ (2, MePy2tacn = N-methyl-N,N-bis(2-picolyl)-1,4,7-triazacyclononane)
by reaction of [FeII(MePy2tacn)(solvent)]2+ (1) and PhIO in CH3CN and its full
characterization are described. This compound can also be prepared
photochemically from its iron(II) precursor by irradiation at 447
nm in the presence of catalytic amounts of [RuII(bpy)3]2+ as photosensitizer and a sacrificial electron
acceptor (Na2S2O8). Remarkably, the
rate of the reaction of the photochemically prepared compound 2 toward sulfides increases 150-fold under irradiation, and 2 is partially regenerated after the sulfide has been consumed;
hence, the process can be repeated several times. The origin of this
rate enhancement has been established by studying the reaction of
chemically generated compound 2 with sulfides under different
conditions, which demonstrated that both light and [RuII(bpy)3]2+ are necessary for the observed increase
in the reaction rate. A combination of nanosecond time-resolved absorption
spectroscopy with laser pulse excitation and other mechanistic studies
has led to the conclusion that an electron transfer mechanism is the
most plausible explanation for the observed rate enhancement. According
to this mechanism, the in-situ-generated [RuIII(bpy)3]3+ oxidizes the sulfide to form the corresponding
radical cation, which is eventually oxidized by 2 to
the corresponding sulfoxide.
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Affiliation(s)
- Anna Company
- Grup de Química Bioinorgànica i Supramolecular (QBIS), Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi , E17071 Girona, Catalonia, Spain
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Milek M, Heinemann FW, Khusniyarov MM. Spin Crossover Meets Diarylethenes: Efficient Photoswitching of Magnetic Properties in Solution at Room Temperature. Inorg Chem 2013; 52:11585-92. [DOI: 10.1021/ic401960x] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Magdalena Milek
- Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen−Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Frank W. Heinemann
- Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen−Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Marat M. Khusniyarov
- Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen−Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
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