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取代基型钌配合物电子结构及与DNA键合倾向研究
引用本文:李俊,尹伟.取代基型钌配合物电子结构及与DNA键合倾向研究[J].广东教育学院学报,2009,29(5):82-88.
作者姓名:李俊  尹伟
作者单位:广东教育学院,化学系,广东,广州,510303 
基金项目:国家自然科学基金资助项目,广东省自然科学基金资助项目,ARF 
摘    要:理论运用密度泛函(DFT)方法,计算四个取代基型钌(II)多吡啶配合物Ru(phen)2(6-R—dppz)]^2+(R—OH,-NO2)和Ru(phen)2(7-R—dppz)]^2+(R=-F,-CH3).合理解释了在主配体(dppz)上引入强拉电子的取代基(-F,-NO2),比引入推电子取代基(-OH,-CH3)有利于提高配合物与DNA键合的能力.这是通过降低最低空轨道LUMO及相近的最低空轨道(LUMO+X)的能量及其插入配体的布居调控的.

关 键 词:钌配合物  DNA  DFT

The Study on the Electronic Structures and Trend in DNA-binding of Substituted Ruthenium Complexes
LI Jun,YIN Wei.The Study on the Electronic Structures and Trend in DNA-binding of Substituted Ruthenium Complexes[J].Journal of Guangdong Education Institute,2009,29(5):82-88.
Authors:LI Jun  YIN Wei
Institution:(Department of Chemistry, Guangdong Education Institute, Guangzhou, Guangdong, 510303, P. R. China)
Abstract:Theoretical studies on the four Ru (II) polypyridyl-type complexes as Ru (phen)2 (6-R- dppz)]^2+ (R=-OH,-NOz) and Ru(phen)2 (7-R-dppz)]^2+(R=-F, -CH3 ) have been carried out using the Density Function Theory (DFT). Some strong electron-withdrawing substituents (-F, -NOz) introduced into the intercalative ligand (dppz) is sure much more advantageous to the interaction between the complex and DNA than some electron-pushing substituents (-OH, -CH3). This could be explained by the decrease of energies of the LUMO and/or the nearby unoccupied orbitals (LUMO+X) and their populations on the intercalative ligand.
Keywords:DNA  DFT
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