A fluorescent compound, which is readily capable of forming a stable complex with a rare-earth metal ion having fluorescence with satisfactory intensity even in an aqueous system and long fluorescence lifetime when formed a complex with the rare-earth metal ion, a complex of the fluorescent compound and the rare-earth metal ion, and a labelled reagent made therefrom, together with a specific binding assay using said labelling agent. A fluorescent compound expressed by the following formula A, typically exemplified by 2,15-diaza[3,3](2,9)-1,10-phenanthrolinophane-N.sup.2,N.sup.15 -diacetic acid. ##STR1##
一种荧光化合物,可以与稀土
金属离子形成稳定的复合物,在与稀土
金属离子形成复合物时具有令人满意的荧光强度和长荧光寿命,该荧光化合物和稀土
金属离子的复合物以及由此制成的标记试剂,以及使用该标记剂的特定结合测定。该荧光化合物用以下A式表示,通常以2,15-二氮[3,3](2,9)-1,10-
菲咯啉基-N.sup.2,N.sup.15-二
乙酸为例。##STR1##