Patent ID: 8877315
Filing Date: 2014-11-04
Classification: C07D,C07F,C09B,G11B

Abstract:
1. An optical recording medium comprising a substrate and an optical recording layer on the substrate, the optical recording layer being formed of an optical recording material comprising at least one indolium compound represented by general formula (IV): wherein ring A represents a naphthalene ring; R in general formula (II), the bond between G and T is a double bond, a conjugated double bond, or a triple bond; G represents a carbon atom; T represents a carbon atom, an oxygen atom, or a nitrogen atom; x, y, and z each represent 0 or 1, provided that, when T is oxygen, y=z=0, and, when T is nitrogen, y+z=0 or 1; w represents an integer of 0 to 4; R wherein R