利用溶液法合成了邻菲啰啉(phen)和氨三乙酸(H3nta)钴配合物Co(phen)2Cl2(1), Na[Co(nta)]·H2O(2), [Co(phen)2(H2O)2][Co(nta)(phen)]2·12H2O(3), 对配合物3进行了X射线单晶衍射表征, 结果表明: 该配合物属三斜晶系, P1空间群, a=1.2448(2) nm, b=1.5898(3) nm, c=1.7412(3) nm, α=91.746(3)°, β=97.807(3)°, γ=103.745(3)°, V=3.309(1) nm^3. 利用荧光光谱法研究了室温下这3种配合物与牛血清白蛋白(BSA)的相互作用, 并测定了不同温度下这3种配合物与BSA相互作用的荧光强度变化, 确定配合物1和3对BSA的荧光猝灭方式均为静态猝灭; 分析了配合物1和3与BSA相互作用时的结合常数、 结合位点数以及热力学函数与温度之间的关系, 进一步讨论了这2种配合物分别与BSA相互作用时的作用位点、 作用力的类型以及两者之间的距离.
Cobalt complexes [Co(phen)2Cl2(1), Na[Co(nta)]·H2O(2), [Co(phen)2(H2O)2]·[Co(nta)(phen)]2·12H2O([STHZ]3[STBZ])] (phen: phenanthroline, nta: nitrilotriacetate) were synthesized in solution, and the structure of complex 3 was characterized by single-crystal X-ray diffraction analysis(XRD). It crystallized in the triclinic system, space group P1 with a=1.2448(2) nm, b=1.5898(3) nm, c=1.7412(3) nm, α=91.746(3)°, β=97.807(3)°, γ=103.745(3)°, V=3.309(1) nm^3. The interaction between bovine serum albumin(BSA) and complexes 1-3 was investigated with fluorescence spectra at room temperature. Fluorescence quenchings were shown as static quenching for complexes 1 and 3 based on the fluorescence spectrum at different temperatures. The binding constant, binding sites and thermodynamic functions were calculated. The interaction sites, binding force and distance for BSA with complexes 1 and 3 were discussed respectively.