Stable and Highly Fluorescent Europium(III) Chelates for Time-Resolved Immunoassays
作者:Qi Wang、Katia Nchimi Nono、Markku Syrjänpää、Loïc J. Charbonnière、Jari Hovinen、Harri Härmä
DOI:10.1021/ic400384f
日期:2013.8.5
Derivatives of 4-[2-(4-isothiocyanatophenyl)ethynyl]-2,6,-bis[N,N-bis(carboxymethyl)-amino]methyl}pyridine europium(III) (1) bearing one (6) or two (7) additional iminodiacetate coordinating arms have been synthesized. 6 and 7 were significantly more stable than 1 as evidenced by competition experiments with ethylenediaminetetraacetic acid (EDTA) and 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic
4- [2-(4-异硫氰基苯基)乙炔基] -2,6-, -双衍生物[ N,N-双(羧甲基) -氨基]甲基}吡啶合铕(III)(1)一个轴承(6)或已经合成了两(7)个额外的亚氨基二乙酸酯配位臂。乙二胺四乙酸(EDTA)和1,4,7,10-四氮杂环十二烷-1,4,7,10-四乙酸(DOTA)的竞争实验证明,6和7比1稳定得多。同时的发光量子产率1保持适度的,其他两个复合物显示显着的发光效率。在6中引入辅助亚氨基二乙酸酯臂为Eu配合物的稳定性和发光性能带来了重要的改善。相反,尽管7比1更发光,但是引入第二亚氨基二乙酸酯配位臂对光物理性质没有任何进一步的好处。用九齿螯合物6及其Eu络合物获得了最有希望的结果,该螯合物与生物素偶联并在人C反应蛋白的生物亲和力免疫测定框架内应用。