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Qi X, Pillet S, de Graaf C, Magott M, Bendeif EE, Guionneau P, Rouzières M, Marvaud V, Stefańczyk O, Pinkowicz D, Mathonière C. Photoinduced Mo-CN Bond Breakage in Octacyanomolybdate Leading to Spin Triplet Trapping. Angew Chem Int Ed Engl 2020; 59:3117-3121. [PMID: 31793123 DOI: 10.1002/anie.201914527] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Indexed: 01/30/2023]
Abstract
The photoinduced properties of the octacoordinated complex K4 MoIV (CN)8 ⋅2 H2 O were studied by theoretical calculations, crystallography, and optical and magnetic measurements. The crystal structure recorded at 10 K after blue light irradiation reveals an heptacoordinated Mo(CN)7 species originating from the light-induced cleavage of one Mo-CN bond, concomitant with the photoinduced formation of a paramagnetic signal. When this complex is heated to 70 K, it returns to its original diamagnetic ground state, demonstrating full reversibility. The photomagnetic properties show a partial conversion into a triplet state possessing significant magnetic anisotropy, which is in agreement with theoretical studies. Inspired by these results, we isolated the new compound [K(crypt-222)]3 [MoIV (CN)7 ]⋅3 CH3 CN using a photochemical pathway, confirming that photodissociation leads to a stable heptacyanomolybdate(IV) species in solution.
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Affiliation(s)
- Xinghui Qi
- CNRS, Univ. Bordeaux, Bordeaux INP, ICMCB, UMR 5026, F-33600, Pessac, France
| | - Sébastien Pillet
- Université de Lorraine, CNRS, CRM2, Nancy, 54506, Vandoeuvre-les-Nancy, France
| | - Coen de Graaf
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Carrer Marcellí Domingo 1, Tarragona, Spain.,ICREA, Passeig Lluís Companys 23, Barcelona, 08010, Spain
| | - Michał Magott
- Jagiellonian University, Faculty of Chemistry, Gronostajowa 2, 30-387, Kraków, Poland
| | - El-Eulmi Bendeif
- Université de Lorraine, CNRS, CRM2, Nancy, 54506, Vandoeuvre-les-Nancy, France
| | - Philippe Guionneau
- CNRS, Univ. Bordeaux, Bordeaux INP, ICMCB, UMR 5026, F-33600, Pessac, France
| | | | - Valérie Marvaud
- Sorbonne Université, IPCM-CNRS-UMR-8232, cc 229, 4 place Jussieu, 75252, Paris Cedex 05, France
| | - Olaf Stefańczyk
- CNRS, Univ. Bordeaux, Bordeaux INP, ICMCB, UMR 5026, F-33600, Pessac, France.,Present address: Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Dawid Pinkowicz
- Jagiellonian University, Faculty of Chemistry, Gronostajowa 2, 30-387, Kraków, Poland
| | - Corine Mathonière
- CNRS, Univ. Bordeaux, Bordeaux INP, ICMCB, UMR 5026, F-33600, Pessac, France
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3
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Gu NX, Ung G, Peters JC. Catalytic hydrazine disproportionation mediated by a thiolate-bridged VFe complex. Chem Commun (Camb) 2019; 55:5363-5366. [DOI: 10.1039/c9cc00345b] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A heterobimetallic VFe complex is demonstrated to catalyse hydrazine disproportionation with yields of up to 1073 equivalents of NH3 per catalyst, comparable to the highest turnover known for any molecular catalyst.
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Affiliation(s)
- Nina X. Gu
- Division of Chemistry and Chemical Engineering
- California Institute of Technology
- Pasadena
- USA
| | - Gaël Ung
- Department of Chemistry
- University of Connecticut
- Storrs
- USA
| | - Jonas C. Peters
- Division of Chemistry and Chemical Engineering
- California Institute of Technology
- Pasadena
- USA
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4
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Tanabe Y, Nishibayashi Y. Catalytic Dinitrogen Fixation to Form Ammonia at Ambient Reaction Conditions Using Transition Metal-Dinitrogen Complexes. CHEM REC 2016; 16:1549-77. [DOI: 10.1002/tcr.201600025] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Indexed: 01/23/2023]
Affiliation(s)
- Yoshiaki Tanabe
- Department of Systems Innovation, School of Engineering; The University of Tokyo; Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Yoshiaki Nishibayashi
- Department of Systems Innovation, School of Engineering; The University of Tokyo; Hongo, Bunkyo-ku Tokyo 113-8656 Japan
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5
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Wu B, Gramigna KM, Bezpalko MW, Foxman BM, Thomas CM. Heterobimetallic Ti/Co Complexes That Promote Catalytic N–N Bond Cleavage. Inorg Chem 2015; 54:10909-17. [DOI: 10.1021/acs.inorgchem.5b01962] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bing Wu
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Kathryn M. Gramigna
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Mark W. Bezpalko
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Bruce M. Foxman
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Christine M. Thomas
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
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