DIARYLETHENE PHOTOCHROMIC COMPOUND AND OPTICALLY RECORDING MATERIAL USING THE COMPOUND

摘要

PURPOSE: To obtain the component useful as an optically recording material. ;CONSTITUTION: A compound of formula I (the ring B is a cyclic hydrocarbon group, a heterocyclic group; R is H, an alkyl, an aryl, a cycloalkyl; the carbon atoms on the rings C and D may have substituents, respectively, or may form condensed rings together with the carbon atoms on the same rings). The compound of formula I is obtained e.g. by dropping a n-BuLi hexane solution on a compound of formula II and subsequently adding perfluorocyclopentene to the reaction product. An optically recording material having a recording layer containing the compound of formula I is obtained by dispersing or dissolving the compound of formula I in a solvent (e.g. carbon tetrachloride), if necessary, together with a binder such as a polyester resin and subsequently coating the obtained dispersion or solution on a substrate, or forming the recording layer on the substrate by a vacuum-deposition method or a vacuum-codeposition method. The optically recording material is excellent in semiconductor laser sensitivity, non-destructive read, record thermal stability, high response speed, repeating durability, etc.;COPYRIGHT: (C)1996,JPO