Lanthanide (III) ion complexing compound comprising:
(1) a sensitizer moiety of formula (I)
in which:
a is an integer from 1 to 4;
b is an integer equal 1 or 2;
c is an integer equal to 1 or 2;
(R
1
)a, (R
2
)b, (R
3
)c are the same or different and are chosen from the group consisting of: H; alkyl; —COOR
4
where R
4
is H or an alkyl; aryl; heteroaryl; saturated or unsaturated cyclic hydrocarbon; CF
3
; CN; a halogen atom; L-Rg; L-Sc; or two consecutive R
3
, two consecutive R
2
or two consecutive R
1
groups together form an aryl or a heteroaryl group or a saturated or unsaturated cyclic hydrocarbon group; where L is a linker, Rg is a reactive group and Sc is a conjugated substance;
X
1
and X
2
are the same or different and are O or S;
A is either a direct bond or a divalent group chosen from —CH
2
— or —(CH
2
)
2
—, said moiety being covalently attached to
(2) a lanthanide (III) ion chelating moiety through A.
Application: Preparation of luminescent lanthanide (III) ion complexes and use thereof as fluorescent labels.
镧系元素(III)离子络合物包括:(1)式(I)的敏化剂基团,其中:a是1至4的整数;b是1或2的整数;c是1或2的整数;(R1)a,(R2)b,(R3)c相同或不同,选择自H;烷基;-COOR4,其中R4为H或烷基;芳基;杂芳基;饱和或不饱和的
环烃;
CF3;CN;卤素原子;L-Rg;L-Sc;或两个连续的R3,两个连续的R2或两个连续的R1组成芳基或杂芳基或饱和或不饱和的
环烃基团;其中L是一个连接剂,Rg是一个反应性基团,Sc是一个共轭物质;X1和X2相同或不同,为O或S;A是直接键或选择自-
CH2-或-( )2-的二价基团,该基团与(2)
镧系元素(III)离子螯合基团通过A共价连接。应用:制备发光的
镧系元素(III)离子络合物,并将其用作荧光标记。