A hydrogenase model system based on the sequence of cytochrome c: photochemical hydrogen evolution in aqueous media

The diiron carbonyl cluster is held by a native CXXC motif, which includes Cys14 and Cys17, in the cytochrome c sequence. It is found that the diiron carbonyl complex works well as a catalyst for H(2) evolution. It has a TON of ∼80 over 2 h at pH 4.7 in the presence of a Ru-photosensitizer and ascor...

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Veröffentlicht in:	Chemical communications (Cambridge, England) England), 2011-08, Vol.47 (29), p.8229-8231
Hauptverfasser:	Sano, Yohei, Onoda, Akira, Hayashi, Takashi
Format:	Artikel
Sprache:	eng
Schlagworte:	Amino Acid Sequence Carbonyls Catalysis Clusters Coordination Complexes - chemistry Cytochromes Cytochromes c - chemistry Cytochromes c - metabolism Evolution Hydrogen - chemistry Hydrogen evolution Hydrogen-Ion Concentration Hydrogenase Hydrogenase - chemistry Iron - chemistry Iron-Sulfur Proteins - chemistry Light Media Models, Molecular Photochemical Photosensitizing Agents - chemistry Ruthenium - chemistry Water - chemistry
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Beschreibung
Zusammenfassung:	The diiron carbonyl cluster is held by a native CXXC motif, which includes Cys14 and Cys17, in the cytochrome c sequence. It is found that the diiron carbonyl complex works well as a catalyst for H(2) evolution. It has a TON of ∼80 over 2 h at pH 4.7 in the presence of a Ru-photosensitizer and ascorbate as a sacrificial reagent in aqueous media.
ISSN:	1359-7345 1364-548X
DOI:	10.1039/c1cc11157d