abstract |
(57) Abstract: A novel 1,3,4-thiadiazole dye is provided. According to the present invention, formula (I): However, the symbols in the formula are as described in the text, and the cationic 1,3,4-thiadiazole dye of is represented by the formula (II): A cationic dye of formula (III) Is provided by reacting with the amine. |