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Titanium dioxide visible light photocatalysis: surface association enables photocatalysis with visible light
Spencer P Pitre1, Tehshik P Yoon, Juan C Scaiano
1Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie Private, Ottawa, ON K1N 6N5, Canada. titoscaiano@mac.com.
Chemical Communications (Cambridge, England)
|April 4, 2017
Abstract:
Titanium dioxide (TiO2) is a widely employed and inexpensive photocatalyst, but its use in organic synthesis has been limited by the short-wavelength ultraviolet irradiation typically used. We have discovered that TiO2 particles efficiently mediate photocatalytic radical cation Diels-Alder cycloadditions using a simple visible light source, enabled by the formation of a visible light absorbing complex of the substrate on the semiconductor surface.