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Abstract

The present invention relates to an optical information recording medium which comprises a support having provided thereon recording layer(s) on which information can be recorded and/or read out with a laser beam, wherein the recording layer contains at least one of the compounds represented by the following formula (I): ##EQU1## wherein .phi. and .PSI. each represents a heterocyclic residue having nitrogen atom(s), and L represents an optionally substituted methine group, or an optionally substituted trimethine, pentamethine, heptamethine or nonamethine group each formed by linkage through conjugated double bonds, provided that L and at least one of .phi. and .PSI. combine to form a ring; and X.sup.1 .theta. represents a 1-valent negative ion and l represents 1, 2 or 3, provided that X.sup.1 .theta. may bind to .phi., L or .PSI. as a substituent is provided by the invention. The optical information recording media of the invention is capable of maintaining adequate recording characteristics over a long period and thus is excellent in stability.

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First Claim