Patent ID: 7615640

Claim:
A merocyanine dye having a structure represented by the general formula (IV), wherein R 13 is an arylene group or a heterocyclic moiety and may have a substituent; R 14 is a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom; each of R 15 and R 16 is a hydrogen atom, an alkyl group, an alkoxy group, an alkylthio group, a mono-substituted amino group, a di-substituted amino group, an aralkyl group, an alkenyl group, an aryl group or a heterocyclic moiety and may have a substituent; R 17 is a substituent having an acidic group; each of R 18 and R 19 is a hydrogen atom, an alkyl group, an aryl group or a heterocyclic moiety and may have a substituent, and R 18 and R 19 may bond directly or through a binding group; each of R 20 , R 21 and R 22 is a hydrogen atom, an alkyl group, an alkoxy group, an aryl group or a heterocyclic moiety; X 5 is a binding group that forms a cyclic structure together with an amino group; p is an integer of 0 to 2; q is an integer of 0 to 2; and a carbon-carbon double bond may be any one of E form and Z form.