化学学报 ›› 2004, Vol. 62 ›› Issue (6): 578-582. 上一篇    下一篇

研究论文

非线性光学极化率密度泛函理论计算的基组效应

韦永勤, 吴克琛, 林晨升, 莽朝永, 刘萍, 张明昕, 洪涛, 周张锋, 庄伯涛   

  1. 中国科学院福建物质结构研究所, 结构化学国家重点实验室, 福州, 350002
  • 投稿日期:2003-05-08 修回日期:2003-11-25 发布日期:2014-02-18
  • 通讯作者: 吴克琛,E-mail:wkc@ms.fjirsm.ac.cn E-mail:wkc@ms.fjirsm.ac.cn
  • 基金资助:
    国家自然科学基金(Nos.69978021,20173064,90203017)、福建省自然科学基金(No.E9930100)资助项目.

Basisset Effects in the DFT Calculations of Hyperpolarizability

WEI Yong-Qin, WU Ke-Chen, LIN Cheng-Sheng, MANG Chao-Yong, LIU Ping, ZHANG Ming-Xin, HONG Tao, ZHOU Zhang-Feng, ZHUANG Bo-Tao   

  1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 35002
  • Received:2003-05-08 Revised:2003-11-25 Published:2014-02-18

由于分子的非线性光学性质与分子外层电子行为及激发性质密切相关,扩散函数对分子的非线性光学极化率计算非常重要.在ADF程序中的DZP基组基础上缀加扩散函数,构造出我们称之为DZP+df的新基组.通过对5个模型分子的含频二阶非线性光学极化率的密度泛函理论计算,表明新基组可以得出较DZP基组更为准确可靠的结果,同时比较ADF程序内置带有扩散函数的大基组,计算量大为减少.

关键词: 非线性光学极化率, 密度泛函理论计算, 扩散函数

Diffuse functions were added based on DZP set in ADF, which was called DZP+df set. The first hyperpolarizability calculations of five selected molecules show that the calculated results by using DZP+df set are much better than those by DZP set. Diffuse functions in the basis set were found to be important to calculate molecular hyperpolarizability.

Key words: nonlinear optical polarizability, DFT calculation, diffuse function