化学学报 ›› 2004, Vol. 62 ›› Issue (19): 1871-1876. 上一篇    下一篇

研究论文

锂离子与芳香体系相互作用的量子化学研究

马国正, 俞庆森, 邹建卫, 郑柯文, 张兵, 王艳花   

  1. 浙江大学宁波理工学院药物分子设计与营养工程重点实验室, 宁波, 315100
  • 投稿日期:2003-12-24 修回日期:2004-05-27 发布日期:2014-02-17
  • 通讯作者: 邹建卫,E-mail:jwzou@css.zju.edu.cn;Tel:0574-88229517. E-mail:jwzou@css.zju.edu.cn
  • 基金资助:
    国家自然科学基金(No.20173050)资助项目.

A Quantum Chemical Study of Cation-π Interaction of Lithium Cation-Aromatic Systems

MA Guo-Zheng, YU Qing-Seng, ZOU Jian-Wei, ZHENG Ke-Wen, ZHANG Bing, WANG Yan-Hua   

  1. Key Laboratory for Molecular Design and Nutrition Engineering of Ningbo City, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100
  • Received:2003-12-24 Revised:2004-05-27 Published:2014-02-17

运用微扰MP2和密度泛函B3LYP方法在不同的基组水平上对锂离子与一系列以杂环为主的芳香化合物所形成复合物的可能构型进行了优化,获得了复合物的几何构型、电荷转移量、结合能等重要信息,对阳离子-π作用与阳离子-杂原子作用的竞争情况进行了讨论.特别是,我们发现此体系阳离子-π复合物的结合能和芳环单体中心上方一个点的静电势成很好的线性相关.揭示了锂离子与芳香杂环形成阳离子-π复合物的形成过程中静电势起着非常重要的作用;同时表明,可用芳环表面静电势来定量预测较复杂体系阳离子-π作用结合能的大小.

关键词: 阳离子-π相互作用, 从头算, 密度泛函, 静电势

A group of 17 lithium cation-aromatic systems has been investigated with MP2 and density functional theory B3LYP at different level. Geometries, charge transfer, binding energies and electrostatic potential have been obtained for all systems both with restricted and unrestricted optimization. For some systems, possible competition of cation-π interaction with cation-heteroatom interaction has been examined. Particularly, a good correlation between binding energy and electrostatic potential at one point above the center of the aromatic rings was established, which shows that electrostatic potential plays an important role in lithium cation-π systems. It is also demonstrated that for designing or evaluating new larger systems, binding energy can be quantitatively predicted by considering only the aromatic electrostatic potential.

Key words: cation-πinteraction, ab initio, DFT, electrostatic potential