新型双核配合物的形成及荧光性质研究  被引量:10

Formation and Luminescent Properties of New Heterobimetallic Complexes

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作  者:张黔玲[1] 刘剑洪[1] 任祥忠[1] 张培新[1] 王芳[1] 李翠华[1] 刘建忠[2] 计亮年[2] 

机构地区:[1]深圳大学师范学院化学与生物学系,深圳518060 [2]中山大学教育部基因工程重点实验室,生命科学学院广州510275

出  处:《高等学校化学学报》2006年第10期1805-1810,共6页Chemical Journal of Chinese Universities

基  金:广东省自然科学基金(批准号:04300882);深圳市科技计划资料项目(批准号:200328);深圳大学自然科学基金(批准号:01011)资助.

摘  要:利用光谱学方法研究了[Ru(bpy)2TPPHZ]2+(TPPHZ=四吡啶[3,2-a:2′,3′-c:3″,2″-h:2,3-j]吩嗪)和[Ru(bpy)2ODHIP]2+(ODHIP=3,4-二羟基-咪唑并[4,5-f][1,10]邻菲咯啉)与Ni2+的配位情况及配位后的荧光性质变化,探讨了配合物与Ni2+配位形成双核配合物后与DNA的作用机制变化.结果表明,[Ru(bpy)2TPPHZ]2+和[Ru(bpy)2ODHIP]2+均可与Ni2+配位,形成双核配合物[Ru(bpy)2(TPPHZ)Ni]4+和[Ru(bpy)2(ODHIP)Ni]4+,配合物的荧光强度随着Ni2+浓度的增加而减弱.与DNA作用后,配合物仍可与Ni2+配位形成双核配合物,[Ru(bpy)2(TPPHZ)Ni]4+的荧光几乎完全消失,同时配合物与DNA保持插入模式作用,而配合物[Ru(bpy)2(ODHIP)Ni]4+与DNA的作用则由沟面结合改为插入结合,同时配合物的荧光减弱.The formation of new heterobimetallic complexes obtained via the coordination reactions of [Ru(bpy)2TPPHZ]^2+ (TPPHZ = tetrapyrido [3, 2-a: 2', 3'-c: 3", 2"-h: 2'", 3'"-j] phenazine) and [ Ru (bpy) 2ODHIP ]^2+ ( ODHIP = 3,4-dihydroxyl-imidazo [ 4,5-f ] [ 1, 10 ] phenanthroline) with Ni^2+ were investigated by spectroscopic methods. The DNA-binding and luminescent properties of the complexes after coordinating with Ni^2+ were also studied. The experimental results indicate that both [ Ru (bpy)2TPPHZ]^2+ and [Ru(bpy)2ODHIP]^2+ could coordinate with Ni^2+ to form the heterobimetallic complexes [Ru (bpy)2 (TPPHZ) Ni]^4+ and [ Ru (bpy) 2 (ODHIP) Ni]^4+. The emission intensity of the complexes decreased with increasing the amounts of Ni^2+. After binding to DNA, both complexes could coordinate with Ni^2+ to form the heterobimetallic complexes. [ Ru(bpy)2 (TPPHZ)Ni]^4+ kept binding to DNA by intercalation, and the luminescence of complex almost disappeared at n (Ni)/n (Ru) = 1. While the binding mode of [ Ru ( bpy )2(ODHIP) Ni]^4+ changed from groove binding to intercalation, and the emission intensity of the complex decreased.

关 键 词:多吡啶钌(Ⅱ)配合物 DNA NI^2+ 荧光 插入结合 

分 类 号:O614.24[理学—无机化学]

 

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