Optical recording material

摘要

Optical data recording material comprises a cpd. having a pi-electron system and one or more substits. with electron donor or electron acceptor properties, dispersed with a binder and mounted on a substrate; such that the cpd. exhibits a characteristic optical absorption peak which is displaced to longer wavelengths after absorption of light of wavelength within that characteristic peak region. Typical cpds. are substd. anthraquinones, pref. with two or more OH and/or NH2 substits. at positions 1,4 and/or 5,8.