Abstract
Abstract Unimolecular cis → trans conversion of stilbene cation radicals generated from 9,10-dicyanoanthracene-biphenyl co-sensitization under air was directly observed in the presence of salt such as LiClO4 in acetonitrile, and the activation parameters of this process were determined by means of transient spectroscopy. It is proposed that the salt reduces the rate of charge recombination between the olefin cation radical and the resulting superoxide anion by complexing with the latter anion.
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