title: Reactive Oxygen Species (ROS)-vs Peroxyl-Mediated Photosensitized Oxidation of Triphenylphosphine: A Comparative Study.
abstract: The oxidation of triphenylphosphine in the presence of various photocatalytic systems (dicyanoanthracene/biphenyl, N-methylquinolinium, triphenylpyrylium, and thiatriphenylpyrylium tetrafluoroborate) was investigated by means of both steady state and laser flash photolysis experiments. The effect of different additives (including 1,4-benzoquinone, diphenylsulfoxide, tetramethylethylene, and sodium azide) on the photosensitized oxidation was investigated in order to fully characterize the involved intermediates. Photoinduced electron transfer and final regeneration of the catalyst occur when dicyanoanthracene and N-methylquinolinium are used, while in cage oxygen transfer to the photoexcited (thio)pyrylium derivatives have been characterized in the last two cases.
authors: Departamento de Química Orgánica, CIHIDECAR - CONICET, 3er Piso, Pabellón 2, Ciudad Universitaria, FCEyN, University of Buenos Aires , Buenos Aires 1428, Argentina.|Department of Chemistry, PhotoGreen Lab , V.Le Taramelli 12, 27100 Pavia, Italy.
authors: Sergio Mauricio
authors: SM
authors: Bonesi
authors: Department of Chemistry, PhotoGreen Lab , V.Le Taramelli 12, 27100 Pavia, Italy.
authors: Stefano
authors: S
authors: Protti
authors: Department of Chemistry, PhotoGreen Lab , V.Le Taramelli 12, 27100 Pavia, Italy.
authors: Angelo
authors: A
authors: Albini