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Photocatalytic Oxygenation Reactions Using Water and Dioxygen

Title
Photocatalytic Oxygenation Reactions Using Water and Dioxygen
Authors
Fukuzumi S.Lee Y.-M.Nam W.
Ewha Authors
남원우이용민Shunichi Fukuzumi
SCOPUS Author ID
남원우scopus; Shunichi Fukuzumiscopus
Issue Date
2019
Journal Title
ChemSusChem
ISSN
1864-5631JCR Link
Citation
ChemSusChem vol. 12, no. 17, pp. 3931 - 3940
Keywords
electron transferhomogeneous catalysisoxidationphotocatalysisphotosystem II
Publisher
Wiley-VCH Verlag
Indexed
SCI; SCIE; SCOPUS scopus
Document Type
Review
Abstract
Water (H2O) is the most environmentally benign reductant and is oxidized to evolve dioxygen (O2)—the greenest oxidant—in photosystem II. This Minireview focuses on photocatalytic oxygenation of substrates with H2O as an oxygen source and O2 as an oxidant. Metal complexes can be oxidized by two molecules of one-electron oxidants with H2O to produce high-valent metal–oxo complexes, which act as active oxidants for oxygenating organic substrates. When an appropriate oxidant is employed for the substrate oxidation, the reduced oxidant can be oxidized by dioxygen to regenerate the oxidant when water and dioxygen are used as an oxygen source and an oxidant, respectively. Photoinduced electron transfer from a substrate (S) to the excited state of complex [(L)MIII]+ produces a substrate radical cation (S.+), accompanied by the regeneration of [(L)MII]. S.+ then reacts with H2O to produce an OH adduct radical that is oxidized by [(L)MIII]+ to yield an oxygenated product (SO), in which the oxygen atom originates from H2O, accompanied by regeneration of [(L)MII]. Photocatalytic oxidation of H2O by O2 to produce H2O2 is combined with the catalytic oxygenation of substrates with H2O2 to produce the oxygenated products, in which the oxygen atom originates from O2 at the beginning but later from water. This Minireview provides a promising strategy for oxygenation of substrates by using H2O as an oxygen source and O2 as the greenest oxidant. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
DOI
10.1002/cssc.201901276
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자연과학대학 > 화학·나노과학전공 > Journal papers
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