高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (4): 686.

• 论文 • 上一篇    下一篇

Ne-HCl势能面和振转光谱的理论研究

李绛1, 朱华1, 谢代前1,2, 鄢国森1   

  1. 1. 四川大学化学系, 成都 610064;
    2. 南京大学理论与计算化学研究所, 化学系, 南京 210093
  • 收稿日期:2002-04-24 出版日期:2003-04-24 发布日期:2003-04-24
  • 通讯作者: 谢代前(1964年出生),男,博士,教授,博士生导师,从事分子激发态及动力学理论研究.E-mail:dqxie@nE-maiju.edu.cn E-mail:dqxie@nE-maiju.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:20173036);教育部高等学校青年教师奖;南京大学引进人才启动基金资助

Theoretical Studies for the Potential Energy Surface and Rovibrational Spectra of Ne-HCl

LI Jiang1, ZHU Hua1, XIE Dai Qian1,2, YAN Guo Sen1   

  1. 1. Department of Chemistry, Sichuan University, Chengdu 610065, China;
    2. Institute of Theoretical and Computational Chemistry, Department of Chemistry, Nanjing University, Nanjing 210093, China
  • Received:2002-04-24 Online:2003-04-24 Published:2003-04-24

摘要: 利用量子化学计算方法CCSD(T)和大基组aug-cc-pVTZ加键函数3s3p2d对Ne-HCl体系的分子间势能面进行了理论研究.结果表明,势能面上有两个势阱,分别对应于线性Ne-ClH和Ne-HCl构型.通过精确求解核运动方程发现,该从头算势能面分别支持5个(对Ne-HCl)和7个(Ne-DCl)振动束缚态.计算得到的振转跃迁频率与实值值吻合.

关键词: Ne-HCl分子, 势能面, CCSD(T)方法, 振转光谱

Abstract: The intermolecular potential energy surface for Ne HCl has been calculated by supermolecule method by using the CCSD(T) approach with a large basis set containing the midpoint bond function set 3s3p2d. Two local potential minima are found to be located at the linear Ne ClH and Ne HCl geometries. The rovibrational energy levels are calculated with Lanczos method. The calculated results show that the ab initio potential support five vibrational bond states for Ne HCl and seven vibrational bond states for Ne DCl, respectively. The calculated vibrational frequencies and rotational transition frequencies are in good agreement with the available observed results.

Key words: Ne HCl complex, Potential energy surface, CCSD(T) method, Rovibrational energy levels

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