Patent ID: 8123846

Claim:
An ink jet ink comprising: a compound represented by the following general formula (I); and a compound represented by the following general formula (II): wherein, in general formula (I), [A] is selected from the group consisting of (a) a 5-membered heterocyclic group, (b) a 5-membered heterocyclic group joined with an aliphatic ring, an aromatic ring, or a heterocyclic ring by condensation, and (c) a 5-membered heterocyclic group having a substituent; [B] and [C] are CR 1 and CR 2 or one of [B] and [C] is a nitrogen atom and the other is CR 1 ; and R 5 and R 6 are each independently a hydrogen atom or a substituent selected from the group consisting of an aliphatic group, an aromatic group, a heterocyclic group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an alkylsulfonyl group, an arylsulfonyl group and a sulfamoyl group; a hydrogen atom of the substituent may be substituted; [D] as well as R 1 and R 2 that can partly constitute [B] and [C] in the formula are each independently a hydrogen atom or a substituent selected from the group consisting of a halogen atom, an aliphatic group, an aromatic group, a heterocyclic group, a cyano group, a carboxy group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a heterocyclic oxycarbonyl group, an acyl group, a hydroxyl group, an alkoxy group, an aryloxy group, a heterocyclic oxy group, a silyloxy group, an acyloxy group, a carbamoyloxy group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an amino group, an acylamino group, a ureido group, a sulfamoylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a heterocyclic sulfonylamino group, a nitro group, an alkylthio group, an arylthio group, a heterocyclic thio group, an alkylsulfonyl group, an arylsulfonyl group, a heterocyclic sulfonyl group, an alkylsulfinyl group, an arylsulfinyl group, a heterocyclic sulfinyl group, a sulfamoyl group, and a sulfonic acid group; a hydrogen atom of the substituent may be substituted and R 1 and R 5 or R 5 and R 6 may be joined to form a 5-membered ring or a 6-membered ring; R x -[E]-R y General formula (II) wherein, in general formula (II), -[E]- is —S(═O) 2 —; R x and R y are each independently one selected from the group consisting of a hydrogen atom, a hydroxyl group, an alkyl group, a hydroxyalkyl group, an alkenyl group, an acyl group, a carbamoyl group, a carboxy group and a sulfonyl group, with the proviso that R x and R y may not simultaneously be (1) hydrogen atoms, (2) hydroxyl groups, or (3) a hydrogen atom and a hydroxyl group.