PHOTOSTABILIZED CYANINE DYES AND OPTICAL RECORDING MEDIUM

摘要

Cyanine dyes which have high solubilities in solvents having high evaporation rates and are stable against light, thus being improved in productivity and capable of realizing optical recording media having excellent light resistance, particularly optical disks, i.e., CD-R and DVD-R. The optical recording medium comprises a composite photostabilized cyanine dye comprising a paired ion of an anion represented by general formula (1) and a cation represented by general formula (2), wherein R01 and R02 each represent (a) (wherein R11 and R12 each represent a 1-4 C alkyl group or a phenyl group), (b) (wherein m is 3, 4, 5, or 6), (c) or a phenyl group; M represents a transition metal; Z1 and Z2 each represent a fused benzene ring or a fused naphthalene ring; R21 and R22 each represent an alkyl group; and n is 0, 1, or 2.