Photoinduced Reversible Structural Transformation and Selective Oxidation Catalysis of Unsaturated Ruthenium Complexes Supported on SiO2

摘要

The photoirradiation of a SiO2-supported Ru complex was found to promote the selective formation of two different,novel unsaturated Ru structures on the surface,dependent on an O2 or N2 atmosphere,differing in the orientation of an Ru-H moiety.One of these structures,owing to an appropriate Ru-H conformation,catalyzed the selective photooxidation of cycloalkanes with O2.The two surface bound unsaturated Ru complexes undergo reversible structural interconversion by photoexcitation at different wavelengths under different atmospheres.