Abstract

Abstract Photostationary state isomer ratios, rate constants for triplet energy transfer, and quantum yields of isomerization were determined for the triplet sensitized isomerization of β-alkylstyrenes (PhCH=CHR, R = CH3, CH2CH3, CH(CH3)2, C(CH3)3, and C(CH3)2CH2CH3) in benzene. The remarkably high ratio of cis-tert-alkylstyrenes at the photostationary state is mainly attributed to lower rate constants for energy transfer to cis-isomers than to trans-isomers.

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