Patent ID: 7348125
Filing Date: 2008-03-25
Classification: C07C,C07D,C09B,G11B,Y10S

Abstract:
1. An optical information recording medium comprising a substrate having provided thereon a recording layer capable of recording information by laser beam irradiation, wherein the recording layer contains: an oxonol dye represented by formula (I-5): wherein R wherein R at least one compound represented by the following general formula (I): wherein R represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; X represents an anion; in represents 0, 1 or 2; A represents a group represented by general formula (II) or (III), wherein n represents 1; and at least one of all aromatic groups in existence is substituted by an aryl group having 6 to 18 carbon atoms, an acyl group having 2 to 18 carbon atoms, an alkylsulfonyl group having 1 to 18 carbon atoms, an arylsulfonyl group having 6 to 18 carbon atoms, an alkylsulfinyl group having 1 to 18 carbon atoms, an alkoxycarbonyl group having 2 to 18 carbon atoms, an aryloxycarbonyl group having 7 to 18 carbon atoms, an aryloxy group having 6 to 18 carbon atoms, an acyloxy group having 2 to 18 carbon atoms, a sulfonyloxy group substituted by a hydrocarbon group having 1 to 18 carbon atoms, a sulfamoyl group which may be substituted by a hydrocarbon group having 1 to 18 carbon atoms, a nitro group, a cyano group or a 4- to 7-membered heterocyclic group: and wherein at least one of the substituents on the aromatic groups is a cyano or an acetyl group and is positioned at the meta-position relative to the carbon atom having N—(R)