Patent ID: 8394481
Filing Date: 2013-03-12
Classification: C07D,C09B,G11B

Abstract:
1. An optical information recording medium comprising a substrate having a surface with pregrooves with a track pitch of 50 to 500 nm and a recording layer on the surface of the substrate on which information is recorded by irradiation with a laser light having a wavelength of 440 nm or less, wherein the recording layer comprises at least one azo-metal complex dye derived from a metal ion and a compound represented by the following general formula (1-1) or (1-2): wherein Q represents a carbocyclic group or a heterocyclic group, and R 6 to R 8 independently represent a hydrogen atom or a substituent, the compound represented by the general formula (1-1) or (1-2) has a dissociative hydrogen atom in Q, and a residue provided by eliminating the dissociative hydrogen atom in Q and the hydrogen atom in the —NH—group marked with asterisk * from the compound represented by the general formula (1-1) or (1-2) is bonded to the metal ion to generate the azo-metal complex dye, and the azo-metal complex dye may contain a component other than the metal ion and the compound represented by the general formula (1-1) or (1-2); wherein the azo-metal complex dye is represented by the following general formula (A): wherein L in which Q represents a carbocyclic group or a heterocyclic group, and R