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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Sichtbar selektiver: Bei Bestrahlung mit sichtbarem (vis.) Licht übertragen angeregte Farbstoffmoleküle (Fst.) Elektronen auf TiO2 unter Bildung von Farbstoffradikalen, die TEMPO zu TEMPO+ oxidieren können. TEMPO+ wiederum oxidiert Alkohole in Gegenwart von O2 selektiv zu den jeweiligen Aldehyden. Ein Grund für die Selektivität ist, dass die Bestrahlung mit sichtbarem Licht und nicht mit UV-Licht stattfindet.

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