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利用紫外、荧光和粘度等方法研究了含不同配体的钌(II)配合物[Ru(phen)2CImP]2+(CImP=3,4-二羟基-咪唑并[4,5-i][1,10]邻菲咯啉)和[Ru(phen)2TPPZ]2+(TPPZ=四吡啶[3,2-a:2’,3’-c:3’’,2’’-h:2’’’,3’’’-j]吩嗪)与DNA的作用机制,并研究了配合物与Zn2+配合后荧光性质变化.结果表明[Ru(phen)2TPPZ]2+与DNA以插入模式作用,而[Ru(phen)2CImP]2+与DNA则以沟面结合模式作用.向配合物溶液中滴加Zn2+后,配合物[Ru(phen)2TPPZ]2+和[Ru(phen)2CImP]2+均可以与Zn2+形成双核配合物[Ru(phen)2(TPPZ)Zn]4+和[Ru(phen)2(CImP)Zn]4+,配合物的荧光减弱.与DNA作用后,配合物仍可以与Zn2+配位形成双核配合物,但[Ru(phen)2(TPPZ)Zn]4+保持插入模式与DNA作用,配合物的荧光减弱.而[Ru(phen)2(CImP)Zn]4+与DNA则由沟面结合改为插入结合,配合物的荧光增强.
The ruthenium (II) complex [Ru (phen) 2ClmP] 2+ with different ligands (CImP = 3,4-dihydroxy-imidazo [4,5-i] 1,10] phenanthroline and [Ru (phen) 2TPPZ] 2+ (TPPZ = tetrapyridyl [3,2-a: 2 ’, 3’-c: The results showed that [Ru (phen) 2TPPZ] 2+ interacted with DNA in the insertion mode, and the interaction between the complex and Zn2 + , While [Ru (phen) 2CImP] 2+ interacts with DNA in a ditch-surface binding mode. The complexes [Ru (phen) 2TPPZ] 2+ and [Ru (phen) 2ClmP] 2+ can form binuclear complexes [Ru (phen) 2 (TPPZ) Zn] 4+ and [Ru (phen) 2 (CImP) Zn] 4+ with Zn2 + However, [Ru (phen) 2 (TPPZ) Zn] 4+ could maintain the insertion mode and DNA interaction, and the fluorescence of the complex decreased. However, [Ru ] 4+ and DNA are changed from grooved surface to intercalated, and the fluorescence of the complex is enhanced.