Critical evaluation of five emissive europium(iii) complexes as optical probes: correlation of cytotoxicity, anion and protein affinity with complex structure, stability and intracellular localisation profile
作者:Benjamin S. Murray、Elizabeth J. New、Robert Pal、David Parker
DOI:10.1039/b803895c
日期:——
Five structurally related europium(iii) complexes of heptadentate macrocyclic ligands bearing azaxanthone or azathiaxanthone chromophores have been evaluated comparatively as responsive probes of the intracellular environment. Protein binding (HSA) and oxy-anion binding constants have been measured by titrimetric analysis, examining ratiometric emission changes for three examples, and systems exhibiting
五个结构相关的带有氮杂蒽酮或氮杂噻吨酮生色团的七齿大环配体的((iii)配合物已作为细胞内环境的响应探针进行了比较评估。已经通过滴定分析法,检查了三个示例的比例发射变化以及系统对柠檬酸或碳酸氢盐具有选择性的系统,测量了蛋白质结合(HSA)和氧阴离子结合常数。已经评估了每种配体和复合物的细胞毒性,并将其与竞争性水介质中观察到的化学稳定性相联系。L(2)的complex配合物是无毒的,在其发射光谱图中显示出很大的变化,以适应HCO(3)(-)(或柠檬酸盐)浓度的变化,从而可以进行比例分析,并且位于细胞线粒体中。