Reaction of triarylphosphine radical cations generated from photoinduced electron transfer in the presence of oxygen |
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Authors: | Yasui Shinro Tojo Sachiko Majima Tetsuro |
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Affiliation: | Laboratory of Biology and Chemistry, Tezukayama University, 3-1 Gakuen-Minami, Nara 631-8585, Japan. yasui@tezukayama-u.ac.jp |
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Abstract: | [reaction: see text] The 9,10-dicyanoanthracene (DCA)-sensitized photoreaction of triarylphosphines (1) was carried out in acetonitrile under aerobic conditions. Phosphine 1 was oxidized to the corresponding phosphine oxide with no appreciable side reactions. Product analysis and laser flash photolysis experiments suggest that the radical cation of 1 formed by the electron transfer from 1 to DCA in the singlet excited state ((1)DCA) reacts with O(2) to eventually afford the phosphine oxide. |
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