| 摘要 |
<p>A dye represented by the following formula (1); <CHEM> wherein A represents an acidic nucleus, L1, L2 and L3 represent a methine group, n represents 0, 1 or 2, Z represents a nonmetalic atom group necessary to form a heterocyclic group by bonding with a nitrogen atom included in the above formula (1), Y represents a substituent represented by the following formula (2) or a heterocyclic group; <CHEM> wherein R1 and R2 represent an alkyl group, and R1 and R2 may form a ring by bonding with each other, R3 represents a hydrogen atom or an electron withdrawing group: said dye represented by the above formula (1) has at least one carboxy group or one alkylsulfonamide group in an aromatic ring portion of its molecular structure.</p> |
