Fluorescent dyes useful for detecting a target material in biological assays an electron donating moiety which is linked by a conjugated π-electron bridge to an electron accepting moiety. The π-electron bridge includes at least one carbocyclic ring structure or heterocyclic ring structure. The electron accepting moiety is a carboxylic acid, a salt of a carboxylic acid, or has the formula:
wherein:
X
8
is selected from the group consisting of H, CH
3
, and (CH
2
)
n6
-Z
2
−
, where Z
2
−
is a monovalent anion; and n
6
is an integer from 1 through 10; and
Q
3
is O or S.
荧光
染料用于
生物分析中检测目标物质,其中包括通过共轭π-电子桥连接的供电子基团和受电子基团。π-电子桥包括至少一个碳环结构或杂环结构。受电子基团是
羧酸、
羧酸盐,或具有以下结构式:
其中:
X8选自H、
CH3和(
CH2)n6-Z2−的群,其中Z2−是一价阴离子;n6是1至10之间的整数;以及Q3是O或S。