摘要 |
PURPOSE:To correspond to a CD player employing a phase difference method by providing an org. membrane layer containing a mixture of phthalocyanine compds. represented by specific formulae to a recording film forming a recording medium. CONSTITUTION:An org. membrane layer containing a mixture of phthalocyanine compds. represented by formulae I, II is formed to a recording film. In the formulae I, II, X is an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkylthio group or an arylthio group respectively capable of having a substituent, or a cyano group, a sulfonic acid group, a sulfonamide group, a sulfonic ester group or a phthalimidemethyl group, center metal M is Si or A2, a substituent Z is -OP(=O)R<1>R<2> or -OP(=O)Ar<1> Ar<2> (wherein R and R<2> are a straight chain, branched chain or cyclic alkyl group or a alkoxy groupcapable of having a substituent and Ar<1> and Ar<2> are an aryl group or an aryloxy group capable of having a substituent), m is 1-2 and n is an integer of 1-4. |