Highly efficient photocatalytic oxygenation reactions using water as an oxygen source

The effective utilization of solar energy requires photocatalytic reactions with high quantum efficiency. Water is the most abundant reactant that can be used as an oxygen source in efficient photocatalytic reactions, just as nature uses water in an oxygenic photosynthesis. We report that photocatal...

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Published inNature chemistry Vol. 3; no. 1; pp. 38 - 41
Main Authors Fukuzumi, Shunichi, Kishi, Takashi, Kotani, Hiroaki, Lee, Yong-Min, Nam, Wonwoo
Format Journal Article
LanguageEnglish
Published England Nature Publishing Group 01.01.2011
Subjects
Alcohol
Catalysis
Chemistry
Manganese
Metalloporphyrins - chemistry
Organic Chemicals - chemistry
Oxidants - chemistry
Oxidation
Oxidizing agents
Oxygen
Oxygen - chemistry
Oxygenation
Photocatalysis
Photochemical Processes
Photosynthesis
Science
Sodium
Solar Energy
Styrene
Sulfonates
Water - chemistry
Japan
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Summary:The effective utilization of solar energy requires photocatalytic reactions with high quantum efficiency. Water is the most abundant reactant that can be used as an oxygen source in efficient photocatalytic reactions, just as nature uses water in an oxygenic photosynthesis. We report that photocatalytic oxygenation of organic substrates such as sodium p-styrene sulfonate occurs with nearly 100% quantum efficiency using manganese(III) porphyrins as an oxygenation catalyst, [Ru(II)(bpy)(3)](2+) (bpy = 2,2'-bipyridine) as a photosensitized electron-transfer catalyst, [Co(III)(NH(3))(5)Cl](2+) as a low-cost and weak one-electron oxidant, and water as an oxygen source in a phosphate buffer solution (pH 7.4). A high-valent manganese-oxo porphyrin is proposed as an active oxidant that effects the oxygenation reactions.
ISSN:1755-4330
1755-4349
DOI:10.1038/nchem.905