Patent ID: 7595139

Claim:
A metal complex dye containing a ligand represented by: one of the following formulas (1a) to (1d): wherein R 1 ′ is an alkyl group; R 2 ′ is, an acyl group or a carbamoyl group; R 3 ′ is an alkyl group, an alkenyl group or aryl group; R 7 and R 8 are each a hydrogen atom, a halogen atom or a substituent, provided that R 7 and R 8 may combine with each other to form a ring; R 13 is a halogen atom or a substituent; 1 is an integer of 0 to 4; R 1 ″ is trifluoromethyl, an alkoxycarbonyl group, or cyano group; R 2 ″ is an alkyl group, an acyl group or a carbamoyl group, provided that the total number of carbon atoms of R 1 ″ and R 2 ″ is 3 or more; R 4 ′ and R 5 ′ are each a hydrogen atom, a halogen atom or a substituent; R 14 and R 15 are each a halogen atom or a substituent; and m and n are each an integer of 0 to 4.