Engineering of Highly Luminescent Lanthanide Tags Suitable for Protein Labeling and Time-Resolved Luminescence Imaging
作者:Nicolas Weibel、Loïc J. Charbonnière、Massimo Guardigli、Aldo Roda、Raymond Ziessel
DOI:10.1021/ja031886k
日期:2004.4.1
was labeled with both Eu or Tb complexes, and the Ln-BSA conjugates were characterized by UV-vis absorption and emission spectroscopy and MALDI-TOF mass spectrometry. Labeling ratios (number of complex molecules per BSA) of ca. 8:1 and 7:1 were established for Eu-BSA and Tb-BSA, respectively. The suitability of the tagged compound for use in bioanalytical time-resolved luminescence microscopy was established
介绍了一种新的配体 LH(4) 的合成基于谷氨酸骨架双功能化在其氮原子上由 6-methylene-6'-carboxy-2,2'-bipyridine 发色单位。紫外-可见分光光度法滴定显示 1:1 M:L 配合物与镧系元素 (III) 阳离子的形成,以及 LH(4) 与等摩尔量的水合 LnCl(3) 盐(Ln = Eu、Gd 和 Tb)的络合得到了通式 [LnL(H(2)O)]Na 的水溶性和稳定配合物,其特征在于元素分析、IR、UV-vis 吸收光谱、(1)H NMR (Ln = Eu),和质谱。[EuL(H(2)O)]Na 复合物形成的条件稳定性常数由竞争性复合实验确定,在 0.01 M TRIS/HCl 缓冲液 (pH = 7.0) 中,log K = 16.5 + /-0.6。在水溶液中,[EuL(H(2)O)]Na 和 [TbL(H(2)O)]Na 复合物高度发光,量子产率分别为