Design of Novel, Water Soluble and Highly Luminescent Europium Labels with Potential to Enhance Immunoassay Sensitivities
作者:Henri Sund、Kaj Blomberg、Niko Meltola、Harri Takalo
DOI:10.3390/molecules22101807
日期:——
To meet the continual demands of more-sensitive immunoassays, the synthesis of novel luminescent Eu(III) chelate labels having similar substituted 4-(phenylethynyl)pyridine chromophores in three different chelate structure classes are reported. Significantly enhanced luminescence intensities were obtained, evidently caused by the intra-ligand charge transfer (ILCT) mediated sensitization, but the alternative
为了满足更灵敏的免疫测定的持续需求,报道了在三种不同螯合结构类别中具有相似取代的 4-(苯乙炔基)吡啶发色团的新型发光 Eu(III) 螯合标记的合成。获得了显着增强的发光强度,这显然是由配体内电荷转移 (ILCT) 介导的敏化引起的,但不能排除替代配体三重态过程。根据本研究,即使螯合物结构发生很小的变化,尤其是 4-(苯乙炔基)吡啶亚基两端的取代基供体/受体强度,也会对发光产生不可预测的影响。观测到的最高亮度在溶液中为 16,400 M-1 cm-1,在干燥表面为 69,500 M-1 cm-1,分别为 3.4 和 8。与参考螯合物相比高 7 倍。新的标记螯合物提供了将检测灵敏度提高到当前概念的十倍的解决方案。