Triplet Intermediates in Cis–Trans Photo-isomerization of 3-Chrysenylethylenes

…, T Hiresaki, T Arai, H Sakuragi, K Tokumaru…

Index: Karatsu, Takashi; Hiresaki, Tatsuro; Arai, Tatsuo; Sakuragi, Hirochika; Tokumaru, Katsumi; Wirz, Jakob Bulletin of the Chemical Society of Japan, 1991 , vol. 64, # 11 p. 3355 - 3362

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Citation Number: 12

Abstract

The effect of substitution of 3-chrysenyl group (Ar) on unsaturated double bonds in their triplet sensitized isomerization was investigated for Ar–CH= CH–R, R=′ Bu (BC) and Ph (SC) by means of stationary irradiations, laser flash photolyses, and MO calculations. Both olefins undergo mutual isomerization between their cis-and trans-isomers. However, BC has a unique triplet energy surface with two decay funnels at the planar trans (3 t*) and twisted ...