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TiO2-catalyzed photooxygenation of cinnamic acid derivatives via their radical cations

Paper ID Volume ID Publish Year Pages File Format Full-Text
29310 44147 2007 6 PDF Available
Title
TiO2-catalyzed photooxygenation of cinnamic acid derivatives via their radical cations
Abstract

Photooxygenation of cinnamic acid derivatives was investigated by using titanium dioxide as a heterogeneous photocatalyst. Benzaldehyde derivatives were efficiently produced by the photooxygenation of the cinnamic acid derivatives having methoxy groups on the phenyl ring. When titanium dioxide was added to acetonitrile solutions of methoxy-substituted cinnamic acids, the color of the suspension changed from colorless to pale yellow. The photooxygenation might proceed through photoinduced single electron transfer from cinnamic acid derivatives to titanium dioxide. Adsorption of the carboxyl group of cinnamic acid derivatives onto the surface of titanium dioxide accelerated the photoinduced electron transfer.

Keywords
Titanium dioxide; Cinnamic acid derivatives; Photoinduced electron transfer; Radical cation; Adsorption
First Page Preview
TiO2-catalyzed photooxygenation of cinnamic acid derivatives via their radical cations
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 189, Issue 1, 10 June 2007, Pages 94–99
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering