含α,β-不饱和酮的新的环金属钌配合物的合成及其对HSO_3^-的识别

Synthesis of A New Cyclometallated Ruthenium Complex Bearing α,β-Unsaturated Ketone Group and Its Recognition of Bisulfite

将4-(2-吡啶基)苯乙酮与3-醛基-7-N,N-二乙基氨基香豆素缩合反应,获得了具有α,β-不饱和酮结构的C,N-配体(1),再将该配体与[Ru(cycme) Cl_2]_2和2,2'-二联吡啶反应,得到了具有α,β-不饱和酮的环金属钌配合物(2),并通过~1H NMR,MS和紫外-可见吸收光谱表征了其结构.结果表明:该配合物的最大吸收峰位于475 nm,其摩尔消光系数达到5. 2×10~4mol^(-1)·L·cm^(-1);在PBS缓冲溶液中,可选择性识别HSO_3^-,对HSO_3^-检测限为37μmol/L.

A new C,N-ligand(1)containingα,β-unsaturated ketone was synthesized by condensation reaction between 3-aldehyde-7-N,N-ethylaminocoumarin and 4-(2-pyriyl)acetophenone.The C,N-ligand then reacted with[Ru(cycme)Cl 2]2 and 2,2′-bipyridine to afford a new cyclometallated ruthenium complex(2)bearingα,β-unsaturated ketone,which was characterized by 1 H NMR,MS and UV-vis spectra.The results showed that the maximum absorption was centered at 475 nm with molar extinction coefficient as high as 5.2×10^4 mol^-1·L·cm^-1.Moreover,the complex exhibited good selectivity and sensitivity to bisulfite in PBS buffered solution,with the detection limit as low as 37μmol/L.