Patent ID: 7985288

Claim:
A colorant compound represented by the general formula (I) below: wherein in the general formula (I) R 1 and R 2 represent independently from each other a species selected from at least one of an alkyl group, an aryl group, an aralkyl group, an alkoxy group, an aryloxy group, an amino group, and a hydroxyl group; R 3 and R 4 represent independently from each other a species selected from at least one of a hydrogen atom, an alkyl group, an aryl group, a heterocycle group, an amino group, a hydroxyl group, a cyano group, an alkoxy group, an alkylsulfanyl group, a carboxylic acid group, a carboxylic acid ester group, a carboxylic acid thioester group, a carbamoyl group, a nitro group, and a halogen atom; optionally, R 3 and R 4 may be bonded together to form an aromatic ring; and Cy represents an aryl group having at least one anionic group.