title: Visible light-driven electron transfer and hydrogen generation catalyzed by bioinspired [2Fe2S] complexes.
abstract: Complexes [{(mu-SCH2)2NCH2C6H5}{Fe(CO)2L(1)}{Fe(CO)2L(2)}] (L(1) = CO, L(2) = P(Pyr) 3, 2; L(1) = L(2) = P(Pyr)3, 3) were prepared, which have the lowest reduction potentials for the mono- and double-CO-displaced diiron complexes reported so far. Hydrogen evolution, driven by visible light, was successfully observed for a three-component system, consisting of a ruthenium polypyridine complex, the biomimetic model complex 2 or 3, and ascorbic acid as both electron and proton donor in CH3CN/H2O. The electron transfer from photogenerated Ru(bpy)3(+) to 2 or 3 was detected by laser flash photolysis. Under optimal conditions, the total turnover number for hydrogen evolution was 4.3 based on 2 and 86 based on Ru(bpy)3(2+) in a three-hour photolysis.
authors.affiliation: State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Centre on Molecular Devices, Dalian University of Technology, 116012 Dalian, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Na
authors.forename: Mei
authors.initials: M
authors.lastname: Wang
authors.forename: Jingxi
authors.initials: J
authors.lastname: Pan
authors.forename: Pan
authors.initials: P
authors.lastname: Zhang
authors.forename: Björn
authors.initials: B
authors.lastname: Akermark
authors.forename: Licheng
authors.initials: L
authors.lastname: Sun