Disclosed are cyanine dyes that are useful for labeling and detecting biological and other materials. The dyes are of formula (I) in which groups R
3
and R
4
are attached to the Z
1
ring structure and groups R
5
and R
6
are attached to the Z
2
ring structure, and n=1, 2 or 3; Z
1
and Z
2
independently represent the carbon atoms necessary to complete a one ring, or two-fused ring aromatic system; at least one of groups R
1
, R
2
, R
3
, R
4
, R
5
, R
6
and R
7
is the group -E-F where E is a single bond or a spacer group and F is a target bonding group; one or more of groups R
11
, R
12
, R
13
and R
14
are independently selected from the group —(CH
2
)
k
—W, where W is sulphonic acid or phosphonic acid and k is an integer from 1 to 10. The dyes may be used in fluorescence labeling applications, where the presence of one and preferably multiple water solubilising groups attached to the 3-position of the indolinium ring reduces dye-dye interactions, and hence dye-dye quenching, particularly where multiple dye molecules are attached to components such as nucleic acids, oligonucleotides, proteins and antibodies.
本发明涉及一种靛烯
染料,可用于标记和检测
生物和其他材料。该
染料的
化学式为(I),其中基团R3和R4连接到Z1环结构上,基团R5和R6连接到Z2环结构上,n = 1、2或3;Z1和Z2独立地表示完成一个环或两个融合环芳香系统所需的碳原子;基团R1、R2、R3、R4、R5、R6和R7中至少有一个是-E-F基团,其中E是单键或间隔基团,F是目标结合基团;基团R11、R12、R13和R14中的一个或多个独立地选自组-(
CH2)k-W,其中W为
磺酸或
膦酸,k为1至10的整数。该
染料可用于荧光标记应用中,在该应用中,附加到靛烯环的3位的一个或多个
水溶性基团降低了
染料-
染料相互作用,从而减少了
染料-
染料淬灭,特别是当多个
染料分子附加到核酸、寡核苷酸、蛋白质和
抗体等组分时。