| 摘要 |
A phthalocyanine dye of specific structure represented by the following general formula (1) or (2): <CHEM> where Y is O or S attached to the phthalocyanine ring, Z is the group of atoms required to complete a carbon or heterocyclic ring together with C, A1 is a monovalent substituent bulkier than a hydrogen atom, and each of X1 and X2 is H or a monovalent substituent or, in the alternative, X1 and X2, taken together, form a single bond, <CHEM> where Y and Z1 have the same meanings as defined for Y and Z in formula (1), A11 is a monovalent substituent having a branched alkyl group, which is attached to the ring completed by Z1, and s1 is the number of A11, is used for the recording layer of an optical recording layer. This phthalocyanine dye is unlikely to attack a substrate material such as PC, can be handled with ease, and has a high solubility in a coating solvent advantageous for film formation, for instance, an alcoholic solvent, e.g., ethyl cellosolve or an aliphatic hydrocarbon solvent. <IMAGE> |
