基于3⁃乙基⁃1⁃(2⁃噻吩基)咪唑鎓的环金属钌配合物的合成及其对Hg^(2+)的识别

Cycloruthenated Complex Based on 3⁃Ethyl⁃1⁃(thiophen⁃2⁃yl)imidazolium:Synthesis and Recognizing Hg^(2+)

以3‑乙基‑1‑(2‑噻吩基)咪唑鎓(L)和2,2'‑联吡啶(bpy)为配体,合成了一个新的环金属钌配合物[Ru(L)(bpy)_(2)]^(+)(1),并通过NMR和HRMS谱表征了该配合物。用紫外可见吸收光谱实验研究了该配合物对常见金属离子的识别作用,发现在CH_(3)CN/HEPES中,仅Hg^(2+)的加入使配合物溶液的最大吸收峰由546 nm蓝移至448 nm,溶液由紫红色变为黄色。通过吸收光谱及质谱分析,推测Hg^(2+)与配合物1的作用机理可能是Hg^(2+)与硫作用引起Ru—C配位向Ru—S配位模式转化。

A new cyclometalated ruthenium complex[Ru(L)(bpy)_(2)]^(+)(1)was synthesized by using 3‑ethyl‑1‑(thiophen‑2‑yl)imidazolium(L)and 2,2'‑bipyridine(bpy),which has been characterized by NMR and HRMS.The interactions between complex 1 and common metal ions were investigated by UV‑Vis absorption spectra.Only upon the addition of Hg^(2+),the absorption was blue‑shifted from 548 to 448 nm companied with the solution color varying from red to yellow.By analyzing absorption and MS spectra,the mechanism of complex 1 sensing to Hg_(2)+could be attributed to the possible conversion of coordination mode from Ru—C to Ru—S resulting from the interaction between Hg^(2+)and S.