UV-laser photochemistry: diffusion-controlled trapping of cyclic 1, 3-diradicals by molecular oxygen-conformational effects on triplet lifetimes

…, P Hoessel, W Huemmer, H Platsch…

Index: Adam, Waldemar; Hoessel, Peter; Huemmer, Walter; Platsch, Herbert Journal of the American Chemical Society, 1987 , vol. 109, # 24 p. 7570 - 7572

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Citation Number: 18

Abstract

a Determined by benzophenone-sensitized photolysis (Coherent argon ion laser, Innova 18, 363.8-nm line (0.2 W)) under oxygen pressure (1-10 atm) at 8" C by using eq 2 (cf. ref 2a for experimental details). bThe trapping factor (Tf) was unity in the error limit for all systems, thus the rate constant for oxygen-catalyzed intersystem crossing (k,) was negligible compared to trapping (k,). Quoted error limits are standard errors. Weast, RC; Astle, HJ Handbook of ...

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