title: Titanium dioxide visible light photocatalysis: surface association enables photocatalysis with visible light irradiation.
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 TiO2particles 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.
authors.affiliation: Department 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.
authors.forename: Spencer P
authors.initials: SP
authors.lastname: Pitre
authors.forename: Tehshik P
authors.initials: TP
authors.lastname: Yoon
authors.forename: Juan C
authors.initials: JC
authors.lastname: Scaiano