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Visible-Light-Induced Aerobic Oxidation of Alcohols in a Coupled Photocatalytic System of Dye-Sensitized TiO2 and TEMPO

Authors

  • Miao Zhang Dr.,

    1. Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P.R. China), Fax: (+86) 10-82616495
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  • Chuncheng Chen,

    1. Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P.R. China), Fax: (+86) 10-82616495
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  • Wanhong Ma,

    1. Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P.R. China), Fax: (+86) 10-82616495
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  • Jincai Zhao Prof.

    1. Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P.R. China), Fax: (+86) 10-82616495
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  • This work was supported by 973 project (No. 2007CB613306) and the NSFC (Nos. 20537010, 20772129, and 20777076) and CAS. TEMPO=2,2,6,6-tetramethylpiperidinyloxyl.

Abstract

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Like a differential gear: Upon irradiation with visible light, excited dye molecules inject electrons into TiO2 and form dye radicals, which can oxidize TEMPO to TEMPO+, which in turn oxidizes alcohols in the presence of O2 selectively to corresponding aldehydes. One reason for the selectivity is that the irradiation is downshifted to visible light.

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