| 摘要 |
PROBLEM TO BE SOLVED: To provide a xanthene dye having a desired spectrum and excellent in solubility to expected organic solvents and heat resistance, and its manufacturing method.SOLUTION: A xanthene dye is represented by a general formula (1), where two Rare same alkyl group and the like, Rand Rare each different aryl group or heteroaryl group. In the xanthene dye, it is preferable that Rand Rin the above general formula (1) are each different aryl group and further Rand Rin the above general formula (1) are each selected from an o-tolyl group, a 2,6-xylyl group, a 2-methyl-6-ethylphenyl group. |
