| 摘要 |
An optical information recording medium for carrying out recording, readout or erasing by laser beam which comprises a support having carried thereon a recording layer containing dye(s) represented by the general formula (I): <IMAGE> wherein R1 and R2 independently represent substituted or unsubstituted alkyl groups, substituted or unsubstituted alkenyl groups, or substituted or unsubstituted aryl groups, L represents a substituted or unsubstituted methine group, or a linking group formed by linkage of 3, 5 or 7 substituted or unsubstituted menthine groups through conjugated double bonds, Z represents an atomic group for completing an aromatic ring optionally having substituent(s), and X- represents a monovalent or divalent anion for neutralization of electron charge of the cationic part. The present optical information recording media have adequate recording characteristics and have a dye recording layer which is capable of maintaining the characteristics over a long period and thus is excellent in stability.
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