| abstract |
Kind Code: A1 Asymmetric benzoxanthene dyes useful as fluorescent dyes are provided. An asymmetric benzoxanthene dye compound having the following formula (A), wherein Y 1 and Y 2 are independently hydroxyl, oxygen, iminium, or amine. R 1 to R 8 are independently hydrogen, fluorine, chlorine, lower alkyl, lower alkene, lower alkyne, sulfonate, amino, ammonium, amide, nitrile, alkoxy, a linking group, or a combination thereof. R 9 is acetylene, alkane, alkene, cyano, substituted phenyl, or a combination thereof, and the substituted phenyl has a structure of the following formula (B), and X 1 is a carboxylic acid or sulfonic acid: X 2 and X 5 are independently hydrogen, chlorine, fluorine, or lower alkyl; and X 3 and X 4 are independently hydrogen, chlorine, fluorine, lower alkyl, carboxylic acid, sulfonic acid, Or a compound which is a linking group. [Selection figure] None |