高等学校化学学报

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含碱金属分子簇体系的结构和NLO性质

孙晓颖, 李志儒, 吴迪, 孙家锺, 唐敖庆   

  1. 吉林大学理论化学研究所, 理论化学计算国家重点实验室, 长春 130021
  • 收稿日期:2006-04-26 修回日期:1900-01-01 出版日期:2007-06-10 发布日期:2007-06-10
  • 通讯作者: 李志儒

Structures and NLO Properties of Molecular Clusters with Alkali Metal Atom

SUN Xiao-Ying, LI Zhi-Ru*, WU Di, SUN Chia-Chung, TANG Au-Chin   

  1. State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130021, China
  • Received:2006-04-26 Revised:1900-01-01 Online:2007-06-10 Published:2007-06-10
  • Contact: LI Zhi-Ru

摘要: 采用MP2方法优化得到Li(HF)n(n=2~4)体系的三个环型结构. 使用高水平的从头算方法MP2/6-311++G(3df,3pd)计算了它们的偶极矩μ0、极化率α0和一阶超极化率β0. 得出了大的一阶超极化率的变化规律, 并揭示出额外电子是引起大一阶超极化率的主要原因.

关键词: 从头算, 非线性光学(NLO)性质, 含碱金属的分子簇体系

Abstract: By using ab initio calculation, three structures with all real frequencies were obtained for the Li(HF)n(n=1—4) clusters. The dipole moments(μ), polarizabilities(α0) and the first hyperpolarizabilities(β0) of Li(HF)n(n=2—4) were investigated at MP2/6-311++G(3df,3pd) level. The large first hyperpolarizabilities(β0)(53710×10-33—113270×10-33 esu) were found. It is revealed that the contributions of Li polarized to α0 and β0 values are dominantive.

Key words: Ab initio calculation, Nonlinear optical(NLO) properties, Molecular clusters with alkali metal atom

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