Patent ID: 6245403
Filing Date: 2001-06-12
Classification: C07D,C09B,G11B,Y10S,Y10T

Abstract:
An optical storage medium comprising a substrate and a storage layer, wherein the storage layer comprises a compound of the formula ##STR47##in which A and A', independently of one another, are unsubstituted or mono- or di-halo-, -hydroxy-, --C.sub.1 -C.sub.6 alkyl-, --C.sub.1 -C.sub.6 alkoxy-, -cyano- or -nitro-substituted phenyl, pyridyl, pyrrolyl, imidazolyl, furyl or thienyl, which can, if desired, be fused to a benzene ring, are halide, tetrafluoroborate or unsubstituted or with one or more halogen substituted C.sub.1 -C.sub.6 alkanesulfonate, benzenesulfonate, C.sub.1 -C.sub.6 alkylbenzenesulfonate, C.sub.1 -C.sub.6 alkylsulfate or di-C.sub.1 -C.sub.6 alkyl-phosphonate of N-C.sub.1 -C.sub.6 alkyl-pyridiniumyl, or are unsubstituted or mono- or di-hydroxy-substituted C.sub.2 -C.sub.6 alkyl or C.sub.2 -C.sub.6 alkenyl, whose chain may be uninterrupted or interrupted by one or two oxygen atoms,B and B', independently of one another, are 2 H, S, S.sub.2 or SO.sub.2, andn and n', independently of one another, are each a number from 1 to 4,with the proviso that a compound of the formula (I) or (II) is comprised in said storage layer, which is not of the formula ##STR48##wherein R is independently selected from the group consisting of hydrogen, aryl, alkyl, substituted aryl, substituted alkyl, alkoxy, aryl alkyl or aryloxy.