Lanthanide (III) ion complexing pyrazoyl-aza(thio)xanthone comprising compounds, their complexes and their use as fluorescent labels

摘要

Lanthanide (III) ion complexing compound comprising: SL LI(1) a sensitizer moiety of formula (I) EMI ID=1.1 HE=54 WI=98 LX=454 LY=1050 TI=CF 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 LI(2) a lanthanide (III) ion chelating moiety through A. /SL These luminescent lanthanide (III) ion complexes may be useful as fluorescent labels.