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; (R1)a, (R2)b, (R3)C are the same or different and are chosen from the group consisting of: H; alkyl; -COOR4 where R4 is H or an alkyl; aryl; heteroaryl; saturated or unsaturated cyclic hydrocarbon; CF3; CN; a halogen atom; L-Rg; L-Sc; or two consecutive R3, two consecutive R2 or two consecutive R1 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; X1 and X2 are the same or different and are O or S; A is either a direct bond or a divalent group chosen from -CH2- or -(CH2)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(III)离子络合物,包括:(1)具有以下式(I)的感光基团,其中:a是1到4之间的整数;b是等于1或2的整数;c是等于1或2的整数;(R1)^a,(R2)^b,(R3)^c相同或不同,并选自以下群体:H;烷基;-COOR4,其中R4为H或烷基;芳基;杂环芳基;饱和或不饱和
环烃;
CF3;CN;卤原子;L-Rg;L-Sc;或两个连续的R3,两个连续的R2或两个连续的R1基团共同形成芳基或杂环芳基或饱和或不饱和
环烃基团;其中L是连接物,Rg是反应性基团,Sc是共轭物质;X1和X2相同或不同,为O或S;A是直接键或从-
CH2-或-( )2-中选择的二价基团,所述基团通过A与(2)具有配位基团的
镧系(III)离子共价连接。应用:制备发光的
镧系(III)离子络合物并将其用作荧光标记剂。