Synthesis of a Highly Fluorescent β-Diketone−Europium Chelate and Its Utility in Time-Resolved Fluoroimmunoassay of Serum Total Thyroxine
作者:Feng-Bo Wu、Shi-Quan Han、Chao Zhang、You-Feng He
DOI:10.1021/ac025727f
日期:2002.11.1
solution (50 mmoVLTris-HCl; pH, 8.0), the application of the chelate label in direct serum T4 TRFIA experienced a problem of matrix interference, which was probably caused by some unknown chelating components in the samples as a result of the fact that the fluorescence of the BCTOT-Eu chelate was prone to quenching or enhancement by some chelating reagents. To remove this problem, an indirect serum T4 TRFIA
合成了一种新的高荧光β-二酮-eur螯合物,并用作示踪剂,开发了一种时间分辨的荧光免疫测定法(TRFIA),用于检测血清总甲状腺素(T4)。四齿β-二酮螯合剂1,1-双(噻吩-2'-基)-4,4,5,5,6,6,7,7-八氟癸烷-1,3,8,10-四酮(BTOT ),在结构上由两个单元的壬基三氟丙酮(TTA)衍生物组成,但在存在过量Eu3 +的情况下,与原始TTA分子相比,荧光表达大大增强。在水溶液中研究了BTOT che螯合物的发光性质。BTOT的氯磺酰化得到1,10-双(5'-氯磺基噻吩-2'-基)-4,4,5,5,6,6,7,7-八氟癸烷-1,3,8,10-四酮(BCTOT),它可能与蛋白质(即 链霉亲和素或BSA-T4偶联物),并用作TRFIA的示踪剂。尽管在缓冲水溶液(50 mmoVLTris-HCl; pH,8.0)中可以检测到非常低的BCTOT-Eu络合物(约1.07 x 10(-12)mol