Visible Light-Driven Electron Transfer and Hydrogen Generation Catalyzed by Bioinspired [2Fe2S] Complexes

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• 作者：Yong Na ; Mei Wang ; Jingxi Pan ; Pan Zhang ; Bjö ; rn Å ; kermark ; Licheng Sun
• 刊名：Inorganic Chemistry
• 出版年：2008
• 出版时间：April 7, 2008
• 年：2008
• 卷：47
• 期：7
• 页码：2805 - 2810
• 全文大小：253K
• 年卷期：v.47,no.7(April 7, 2008)
• ISSN：1520-510X

文摘

Complexes [{(μ-SCH₂)₂NCH₂C₆H₅}{Fe(CO)₂L¹}{Fe(CO)₂L²}] (L¹ = CO, L² = P(Pyr)₃, 2; L¹ = L² = 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)₃²⁺ in a three-hour photolysis.