Studies on Photochromic Salicylideneanilines. I. Photo-induced Electron Spin Resonance Spectra in Salicylideneaniline-Phenothiazine Complexes

Abstract

It has been found that photo-reversible electron spin resonance signals are observed on low-temperature irradiation into various powdered complexes composed of anil and phenothiazine. And on the basis of studies on the photo-stationary structure and photo-after decay rate of the spectrum, a main component of the signal has been proposed as phenothiazine cation which is produced by a charge-transfer type interaction with the photocolored quinoidlike form of anil.