Patent ID: 6225024
Filing Date: 2001-05-01
Classification: C07D,C09B,G11B,Y10S

Abstract:
An information recording medium comprising a substrate having provided thereon a recording layer capable of recording information by a laser ray, wherein said recording layer contains a dye compound represented by formula (I-1): ##STR212##wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted heterocyclic group, L.sub.1, L.sub.2 and L.sub.3 each independently represents a methine group which may have a substituent, m represents 0, 1, 2 or 3, X.sup.k+ represents a cation and k represents an integer of from 1 to 10, provided that when m is 2 or 3, the plurality of L.sub.2 and L.sub.3 groups may be the same or different.