Citation: Xu-Feng LIU, Bo XU, Hang XU, Yu-Long LI. Synthesis, characterization, and electrocatalytic hydrogen evolution of diiron dithiolato pentacarbonyl complexes bearing phosphine ligand[J]. Chinese Journal of Inorganic Chemistry, ;2023, 39(8): 1619-1627. doi: 10.11862/CJIC.2023.117 shu

Synthesis, characterization, and electrocatalytic hydrogen evolution of diiron dithiolato pentacarbonyl complexes bearing phosphine ligand

Xu-Feng LIU ^{1, 2,,} ,
Bo XU ³ ,
Hang XU ³ ,
Yu-Long LI ³

1.
School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, Zhejiang 315211, China
2.
Zhejiang Institute of Tianjin University, Ningbo, Zhejiang 315201, China
3.
College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan 643000, China

Corresponding author: Xu-Feng LIU, nkxfliu@126.com
Received Date: 9 December 2022
Revised Date: 7 May 2023

Figures(9)

In this work, four diiron dithiolato pentacarbonyl complexes with phosphine ligands were synthesized and structurally characterized. The starting complex [Fe₂(CO)₆(μ-SCH₂CH(CH₂OOCH)S)] (1) reacted with triphenylphosphine, tricyclohexylphosphine, tris(2-methoxyphenyl)phosphine, or tris(4-(trifluoromethyl)phenyl)phosphine and Me₃NO·2H₂O as the decarbonylation agent to produce the target products [Fe₂(CO)₅(L)(μ-SCH₂CH(CH₂OOCH)S)] (L=PPh₃ (2), PCy₃ (3), P(2-C₆H₄OCH₃)₃ (4), P(4-C₆H₄CF₃)₃ (5)) in 59%-88% yields. Complexes 2-5 have been characterized by elemental analysis, IR, and NMR spectroscopy, together with single-crystal X-ray diffraction analysis. Electrochemical studies have revealed that complexes 1-5 could electro-catalyze the reduction of proton to hydrogen and complex 1 had better catalytic efficiency than other complexes.
- [FeFe]-hydrogenases,
- diiron complex,
- X-ray crystallography,
- H₂ evolving catalyst
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