合成了一种新的钌(Ⅱ)配合物[Ru(bpy)2(Hfip)](ClO4)2,其中bpy代表2,2’-联吡啶,Hfip代表2-(9H-芴-2一基)-lH-咪唑-[4,5-f]-[1,10]-邻菲□啉.通过紫外可见光谱、荧光光谱、稳态荧光淬灭、与溴化乙锭的竞争实验、粘度测量和DNA热变性研究了该配合物与小牛胸腺DNA的键合性质.结果表明,该配合物能嵌入键合DNA,键合常数Kb=8.6×10^5L·mol^-1(50mmol·L^-1NaCl).
A ruthenium(H) complex of [Ru(bpy)2(Hfip)](ClO4)2 (bpy=2,2'-bipyridine, Hfip=2-(9H-fluoren-2-yl)-lH- imidazolo-[4,5-f]-[1,10]-phenanthrolin) was synthesized. The DNA binding properties of the complex were studied by means of electronic absorption and emission spectroscopic titrations, steady-state emission quenching by Fe(CN)6^4-, viscosity measurements, DNA competitive binding with ethidium bromide, and thermal denaturation of DNA. The results indicated that the complex bound to calf-thymus DNA in an intercalative mode with a binding constant of 8.6× 10^5 L· mol^-1 in the presence of 50 mmol· L^-1 NaCl solution.