| 摘要 |
PROBLEM TO BE SOLVED: To provide a salt excellent in solubility in an organic solvent.SOLUTION: There is provided the salt of an anion represented by formula (1) and an onium cation derived from a dye capable of forming a salt with the anion. [In the formula (1), Zand Zeach independently represent a group having two substituents obtained by releasing a proton from a monovalent proton-donating substituent.] The onium cation is a cation derived from a cyanine dye, a cation derived from a triarylmethane dye, or a cation derived from a xanthene dye. |
