Abstract

Spin-polarized triplet radical pairs produced by the photochemical reaction of triplet benzophenone with aromatic amines were detected in glassy matrices at 77 K using a time-resolved ESR method. By analysis of the spectra, it is concluded that the population of the Z spin sublevel of the radical pair whose principal axis is nearly parallel to the direction of the carbonyl group of benzophenone is predominant and its spin polarization is transferred from the initial polarization of the triplet state of benzophenone.

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