Triarylamine derivative

A triarylamine derivative represented by the following Formula (I):

• wherein, in Formula (I):
• R111, R112, R121, R122, R131 and R132 each independently represent a hydrogen atom, an aliphatic group or an aromatic group, provided that R131 and R132 are not both phenyl groups having a group represented by —NR141R142 at a fourth position;
• R141 and R142 each independently represent a hydrogen atom, an aliphatic group, or an aromatic group;
• R113, R123 and R133 each independently represent a substituent selected from the group consisting of a halogen, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group, a cyano group, a hydroxyl group, a nitro group, a carboxyl group, an alkoxy group, an aryloxy group, a silyloxy group, a heterocyclic oxy group, an acyloxy group, a carbamoyloxy group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an amino group, an acylamino group, an aminocarbonylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, a sulfamoylamino group, an alkyl- or aryl-sulfonylamino group, a mercapto group, an alkylthio group, an arylthio group, a heterocyclic thio group, a sulfamoyl group, a sulfo group, an alkyl- or aryl-sulfinyl group, an alkyl- or aryl-sulfonyl group, an acyl group, an aryloxycarbonyl group, an alkoxycarbonyl group, a carbamoyl group, an aryl-azo group, a heterocyclic-azo group, an imido group, a phosphino group, a phosphinyl group, a phosphinyloxy group, a phosphinylamino group, and a silyl group;
• n113, n123 and n133 each independently represent an integer of from 1 to 4;
• and X− represents a counteranion represented by any of the following Formulae (II) to (IV):
• wherein, in Formulae (II) to (IV), R211, R212, R311, R312, R411, R412 and R413 each independently represent an aliphatic group, an aromatic group or a heterocyclic group.