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Hizbullah L, Rahaman A, Safavi S, Haukka M, Tocher DA, Lisensky GC, Nordlander E. Synthesis of phosphine derivatives of [Fe 2(CO) 6(μ-sdt)] (sdt = SCH 2SCH 2S) and investigation of their proton reduction capabilities. J Inorg Biochem 2023; 246:112272. [PMID: 37339572 DOI: 10.1016/j.jinorgbio.2023.112272] [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: 12/08/2022] [Revised: 04/10/2023] [Accepted: 05/28/2023] [Indexed: 06/22/2023]
Abstract
The reactions of [Fe2(CO)6(μ-sdt)] (1) (sdt = SCH2SCH2S) with phosphine ligands have been investigated. Treatment of 1 with dppm (bis(diphenylphosphino)methane) or dcpm (bis(dicyclohexylphosphino)methane) affords the diphosphine-bridged products [Fe2(CO)4(μ-sdt)(μ-dppm)] (2) and [Fe2(CO)4(μ-sdt)(μ-dcpm)] (3), respectively. The complex [Fe2(CO)4(μ-sdt)(κ2-dppv)] (4) with a chelating diphosphine was obtained by reacting 1 with dppv (cis-1,2-bis(diphenylphosphino)ethene). Reaction of 1 with dppe (1,2-bis(diphenylphosphino)ethane) produces [{Fe2(CO)4(μ-sdt)}2(μ-κ1-dppe)] (5) in which the diphosphine forms an intermolecular bridge between two diiron cluster fragments. Three products were obtained when dppf (1,1'-bis(diphenylphosphino)ferrocene) was introduced to complex 1; they were [Fe2(CO)5(μ-sdt)(κ1-dppfO)] (6), the previously known [{Fe2(CO)5(μ-sdt)}2(μ-κ1-κ1-dppf)] (7), and [Fe2(CO)4(μ-sdt)(μ-dppf)] (8), with complex 8 being produced in highest yield. Single crystal X-ray diffraction analysis was performed on compounds 2, 3 and 8. All structures reveal the adoption of an anti-arrangement of the dithiolate bridges, while the diphosphines occupy dibasal positions. Infra-red spectroscopy indicates that the mono-substituted complexes 5, 6, and 7 are inert to protonation by HBF4.Et2O, but complexes 2, 3, 4 and [Fe2(CO)5(μ-sdt)(κ1-PPh3)] (9) show shifts of their ν(C-O) resonances that indicate that protons bind to the metal cores of the clusters. Addition of the one-electron oxidant [Cp2Fe]PF6 does not lead to any discernable shift in the IR resonances. The redox chemistry of the complexes was investigated by cyclic voltammetry, and the abilities of complexes to catalyze electrochemical proton reduction were examined.
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Affiliation(s)
- Lintang Hizbullah
- Chemical Physics, Department of Chemistry, Lund University, Box 120, SE-221 00 Lund, Sweden
| | - Ahibur Rahaman
- Chemical Physics, Department of Chemistry, Lund University, Box 120, SE-221 00 Lund, Sweden.
| | - Seyedeh Safavi
- Chemical Physics, Department of Chemistry, Lund University, Box 120, SE-221 00 Lund, Sweden
| | - Matti Haukka
- Department of Chemistry, University of Jyväskylä, Box 111, FI-40014 Jyväskylä, Finland
| | - Derek A Tocher
- Department of Chemistry, University College London, Gower Street, London WC1E 6BT, UK
| | | | - Ebbe Nordlander
- Chemical Physics, Department of Chemistry, Lund University, Box 120, SE-221 00 Lund, Sweden.
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2
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Role of a Redox-Active Ligand Close to a Dinuclear Activating Framework. TOP ORGANOMETAL CHEM 2022. [DOI: 10.1007/3418_2022_77] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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3
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Hogarth G, Orton G, Ghosh S, Sarker JC, Pugh D, Richmond MG, Hartl F, Alker L. Biomimetics of [FeFe]-hydrogenases incorporating redox-active ligands: Synthesis, redox and spectroelectrochemistry of diiron-dithiolate complexes with ferrocenyl-diphosphines as Fe4S4 surrogates. Dalton Trans 2022; 51:9748-9769. [DOI: 10.1039/d2dt00419d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[FeFe]-ase biomimics containing a redox-active ferrocenyl diphosphine have been prepared and their ability to reduce protons and oxidise H2 studied, including 1,1’-bis(diphenylphosphino)ferrocene (dppf) complexes Fe2(CO)4(-dppf)(-S(CH2)nS) (n = 2, edt; n...
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4
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Hu M, Zhao P, Li J, Gu X, Jing X, Liu X. Synthesis, structures, and electrocatalytic properties of phosphine‐monodentate, −chelate, and ‐bridge diiron 2,2‐dimethylpropanedithiolate complexes related to [FeFe]‐hydrogenases. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5523] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Meng‐Yuan Hu
- School of Materials Science and EngineeringNorth University of China Taiyuan 030051 P. R. China
| | - Pei‐Hua Zhao
- School of Materials Science and EngineeringNorth University of China Taiyuan 030051 P. R. China
| | - Jian‐Rong Li
- School of Materials Science and EngineeringNorth University of China Taiyuan 030051 P. R. China
| | - Xiao‐Li Gu
- School of Materials Science and EngineeringNorth University of China Taiyuan 030051 P. R. China
| | - Xing‐Bin Jing
- School of Materials Science and EngineeringNorth University of China Taiyuan 030051 P. R. China
| | - Xu‐Feng Liu
- School of Materials and Chemical EngineeringNingbo University of Technology Ningbo 315211 P. R. China
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5
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Gao S, Liu Y, Shao Y, Jiang D, Duan Q. Iron carbonyl compounds with aromatic dithiolate bridges as organometallic mimics of [FeFe] hydrogenases. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2019.213081] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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6
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Hu M, Yan L, Li J, Wang Y, Zhao P, Liu X. Reactions of Fe
2
(
μ
‐odt)(CO)
6
(odt = 1, 3‐oxadithiolate) with small bite‐angle diphosphines to afford the monodentate, chelate, and bridge diiron complexes: Selective substitution, structures, protonation, and electrocatalytic proton reduction. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4949] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Meng‐Yuan Hu
- School of Materials Science and EngineeringNorth University of China Taiyuan 030051 People's Republic of China
| | - Lin Yan
- School of Materials and Chemical EngineeringNingbo University of Technology Ningbo 315211 People's Republic of China
| | - Jian‐Rong Li
- School of Materials Science and EngineeringNorth University of China Taiyuan 030051 People's Republic of China
| | - Yan‐Hong Wang
- School of Chemical Engineering and TechnologyNorth University of China Taiyuan 030051 People's Republic of China
| | - Pei‐Hua Zhao
- School of Materials Science and EngineeringNorth University of China Taiyuan 030051 People's Republic of China
| | - Xu‐Feng Liu
- School of Materials and Chemical EngineeringNingbo University of Technology Ningbo 315211 People's Republic of China
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7
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Zhao PH, Hu MY, Li JR, Ma ZY, Wang YZ, He J, Li YL, Liu XF. Influence of Dithiolate Bridges on the Structures and Electrocatalytic Performance of Small Bite-Angle PNP-Chelated Diiron Complexes Fe2(μ-xdt)(CO)4{κ2-(Ph2P)2NR} Related to [FeFe]-Hydrogenases. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00759] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pei-Hua Zhao
- School of Materials Science and Engineering, North University of China, Taiyuan, Shanxi 030051, P. R. China
| | - Meng-Yuan Hu
- School of Materials Science and Engineering, North University of China, Taiyuan, Shanxi 030051, P. R. China
| | - Jian-Rong Li
- School of Materials Science and Engineering, North University of China, Taiyuan, Shanxi 030051, P. R. China
| | - Zhong-Yi Ma
- School of Materials Science and Engineering, North University of China, Taiyuan, Shanxi 030051, P. R. China
| | - Yan-Zhong Wang
- School of Materials Science and Engineering, North University of China, Taiyuan, Shanxi 030051, P. R. China
| | - Jiao He
- College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan 643000, P. R. China
| | - Yu-Long Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan 643000, P. R. China
| | - Xu-Feng Liu
- School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, Zhejiang 315211, P. R. China
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8
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Unwin DG, Ghosh S, Ridley F, Richmond MG, Holt KB, Hogarth G. Models of the iron-only hydrogenase enzyme: structure, electrochemistry and catalytic activity of Fe2(CO)3(μ-dithiolate)(μ,κ1,κ2-triphos). Dalton Trans 2019; 48:6174-6190. [DOI: 10.1039/c9dt00700h] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A series of Fe2(triphos)(CO)3(μ-dithiolate) complexes have been prepared and studied as models of the diiron centre in [FeFe]-hydrogenases.
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Affiliation(s)
- David G. Unwin
- Department of Chemistry
- University College London
- London
- UK
| | - Shishir Ghosh
- Department of Chemistry
- University College London
- London
- UK
- Department of Chemistry
| | - Faith Ridley
- Department of Chemistry
- University College London
- London
- UK
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9
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Hydrogenase Biomimetics with Redox-Active Ligands: Synthesis, Structure, and Electrocatalytic Studies on [Fe2(CO)4(κ2-dppn)(µ-edt)] (edt = Ethanedithiolate; dppn = 1,8-bis(Diphenylphosphino)Naphthalene). INORGANICS 2018. [DOI: 10.3390/inorganics6040122] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Addition of the bulky redox-active diphosphine 1,8-bis(diphenylphosphino)naphthalene (dppn) to [Fe2(CO)6(µ-edt)] (1) (edt = 1,2-ethanedithiolate) affords [Fe2(CO)4(κ2-dppn)(µ-edt)] (3) as the major product, together with small amounts of a P–C bond cleavage product [Fe2(CO)5{κ1-PPh2(1-C10H7)}(µ-edt)] (2). The redox properties of 3 have been examined by cyclic voltammetry and it has been tested as a proton-reduction catalyst. It undergoes a reversible reduction at E1/2 = −2.18 V and exhibits two overlapping reversible oxidations at E1/2 = −0.08 V and E1/2 = 0.04 V. DFT calculations show that while the Highest Occupied Molecular Orbital (HOMO) is metal-centred (Fe–Fe σ-bonding), the Lowest Unoccupied Molecular Orbital (LUMO) is primarily ligand-based, but also contains an antibonding Fe–Fe contribution, highlighting the redox-active nature of the diphosphine. It is readily protonated upon addition of strong acids and catalyzes the electrochemical reduction of protons at Ep = −2.00 V in the presence of CF3CO2H. The catalytic current indicates that it is one of the most efficient diiron electrocatalysts for the reduction of protons, albeit operating at quite a negative potential.
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Meng ZF, Gao HL, Wang JX, Shang JY, Li CG. Phenyl-functionalized diiron propanediselenolato complexes containing the chelated or bridged 1,3-bis(diphenylphosphine)propane ligand. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1485148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Zhi-Fen Meng
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, People’s Republic of China
| | - Hui-Ling Gao
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, People’s Republic of China
| | - Jiu-Xia Wang
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, People’s Republic of China
| | - Jing-Yan Shang
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, People’s Republic of China
| | - Chang-Gong Li
- College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, People’s Republic of China
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11
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A comparative study of the electrochemical and proton-reduction behaviour of diphosphine-dithiolate complexes [M2(CO)4(μ-dppm){μ-S(CH2)
n
S}] (M = Fe, Ru; n = 2, 3). TRANSIT METAL CHEM 2017. [DOI: 10.1007/s11243-017-0164-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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