Polymethine dye and optical recording medium containing the polymethine dye

摘要

Polymethine dyes suitable for use in an optical recording medium have the formula IMAGE where p is 0 or 1, Z is nitrogen, oxygen, sulfur, isopropylidene, cyclohexylidene or the radical -CH=CH-, Q is a radical of the formula IMAGE IMAGE IMAGE where R2 is hydrogen, chlorine, bromine or C1-C6-alkyl, L is C1-C12-alkylene, or a single bond R1 is hydrogen, substituted or unsubstituted C1-C20-alkyl, substituted or unsubstituted C5-C7-cycloalkyl or substituted or unsubstituted phenyl, X(-) is an anion, and the rings A may each be substituted or benzofused.