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Issue 10, 2017
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Photocatalytic oxidation of benzene to phenol using dioxygen as an oxygen source and water as an electron source in the presence of a cobalt catalyst

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Abstract

Photocatalytic hydroxylation of benzene to phenol by dioxygen (O2) occurs under visible light irradiation of an O2-saturated acetonitrile solution containing [RuII(Me2phen)3]2+ as a photocatalyst, [CoIII(Cp*)(bpy)(H2O)]2+ as an efficient catalyst for both the water oxidation and benzene hydroxylation reactions, and water as an electron source in the presence of Sc(NO3)3. The present study reports the first example of photocatalytic hydroxylation of benzene with O2 and H2O, both of which are the most green reagents, under visible light irradiation to afford a high turnover number (e.g., >500). Mechanistic studies revealed that the photocatalytic reduction of O2 to H2O2 is the rate-determining step, followed by efficient catalytic hydroxylation of benzene to phenol with H2O2, paving a new way for the photocatalytic oxygenation of substrates by O2 and water.

Graphical abstract: Photocatalytic oxidation of benzene to phenol using dioxygen as an oxygen source and water as an electron source in the presence of a cobalt catalyst

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Publication details

The article was received on 04 Jun 2017, accepted on 21 Aug 2017 and first published on 21 Aug 2017


Article type: Edge Article
DOI: 10.1039/C7SC02495A
Citation: Chem. Sci., 2017,8, 7119-7125
  • Open access: Creative Commons BY-NC license
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    Photocatalytic oxidation of benzene to phenol using dioxygen as an oxygen source and water as an electron source in the presence of a cobalt catalyst

    J. W. Han, J. Jung, Y. Lee, W. Nam and S. Fukuzumi, Chem. Sci., 2017, 8, 7119
    DOI: 10.1039/C7SC02495A

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