计算物理 ›› 2012, Vol. 29 ›› Issue (1): 139-144.

• 论文 • 上一篇    下一篇

PClX(X=1,2)分子基态的结构与势能函数

韩晓琴1,2, 肖夏杰1,3, 刘玉芳1   

  1. 1. 河南师范大学物理与信息工程学院, 河南 新乡 453007;
    2. 商丘师范学院物理与信息工程系, 河南 商丘 476000;
    3. 河南质量工程职业学院, 河南 平顶山 467000
  • 收稿日期:2011-02-24 修回日期:2011-05-24 出版日期:2012-01-25 发布日期:2012-01-25
  • 作者简介:韩晓琴(1975-),女,硕士,讲师,主要从事原子分子结构与动力学研究,E-mail.hanxiaoqin88@163.com
  • 基金资助:
    国家自然科学基金(10574039);教育部科学技术研究重点项目(2060804);河南省创新型科技人才队伍建设工程(084100510011);河南省高等学校杰出科研人才创新工程(2006KYCX002)资助项目

Structure and Potential Energy Function of PCIx (X=1,2) Molecular Ground State

HAN Xiaoqin1,2, XIAO Xiajie1,3, LIU Yufang1   

  1. 1. Department of Physics, Henan Normal University, Xinxiang 453007, China;
    2. Department of Physics, Shangqiu Normal College, Shangqiu 476000, China;
    3. Henan Quality Polytechnic, Pingdingshan 467000, China
  • Received:2011-02-24 Revised:2011-05-24 Online:2012-01-25 Published:2012-01-25

摘要: 采用单双取代的二次组态相互作用(QCISD)方法,使用多种基组对PClX(X=1,2)分子基态结构进行优化计算,选出最优基组6-311+G(df)和6-311G(df)分别对PCl和PCl2分子的离解能、谐振频率和力常数等进行计算,结果与实验值符合很好.在此基础上推导出PCl2分子基态的多体展式势能函数,其等值势能图正确反应了PCl2分子的结构特征及势阱深度,进一步讨论Cl+PCl和P+ClCl分子反应的势能面特征.这些结果可用于微观反应动力学的研究.

关键词: PClX(X=1, 2), 结构, 势能函数

Abstract: QCISD method is used to optimize possible ground-state structures of PCl and PCl2 molecule with multiple basis sets. Dissociation energy, harmonic frequency and force constants are calculated with 6-311 + G (dr) and 6-311G (dr) basis sets, respectively. They agree with experimental observations well. Potential energy functions of PCl2 are derived from many-body expansion theory. Potential energy curves verify structure characteristics and potential depth. Cl+ PCl and P + ClCl based on molecular reaction potential energy surface are discussed. It describes molecular reaction dynamics successfully.

Key words: PCIx(X=1,2), structure, potential energy function

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