There are described stable fluorescent labels comprising a complex of lanthanide metal and a chelating agent comprising a nucleus which is a triplet sensitizer having a triple energy greater than that of said lanthanide metal and at least two heteroatom-containing groups which form coordinate complexes with lanthanide metals and a third heteroatom-containing group or heteratom in or appended to the triplet sensitizer. Labeled physiologically active materials useful in specific binding assays such as labeled antigens, heptens, antibodies, hormones and the like comprising the stable fluorescent labels having physiologically active materials adsorbed or bonded thereto are also described.
本文描述了稳定的荧光标记物,其中包括
镧系
金属和
螯合剂的复合物,该
螯合剂包括一个三重能量大于所述
镧系
金属的三重敏化剂核心和至少两个含杂原子的基团,这些基团与
镧系
金属形成配合物,并且第三个含杂原子的基团或者杂原子附加在三重敏化剂上。本文还描述了用于特定结合测定的标记生理活性物质,例如标记抗原、
肝素、
抗体、激素等,这些生理活性物质吸附或与稳定的荧光标记物结合。