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

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 th...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2008-01, Vol.47 (50), p.9730-9733
Main Authors: Zhang, Miao, Chen, Chuncheng, Ma, Wanhong, Zhao, Jincai
Format: Article
Language:English
Subjects:
photooxidation
radical reactions
TEMPO
TiO2
visible light
Online Access:Get full text
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Summary: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.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200803630