计算物理 ›› 2022, Vol. 39 ›› Issue (5): 624-630.DOI: 10.19596/j.cnki.1001-246x.8502

• 研究论文 • 上一篇    

外电场下CHBr3分子的光谱和解离特性

乃皮赛·吾买尔江1(), 闫好奎2, 布玛丽亚·阿布力米提1,*(), 王丹琦1,*(), 向梅1, 安桓1   

  1. 1. 新疆师范大学物理与电子工程学院, 新疆 乌鲁木齐 830054
    2. 新疆计量测试研究院, 新疆 乌鲁木齐 830011
  • 收稿日期:2022-01-10 出版日期:2022-09-25 发布日期:2023-01-07
  • 通讯作者: 布玛丽亚·阿布力米提, 王丹琦
  • 作者简介:

    乃皮赛·吾买尔江(1997-),女,硕士研究生,E-mail:

  • 基金资助:
    国家自然科学基金(21763027); 新兴污染物与生物标志物监测天山创新团队基金(2021D14017); 新疆区域协同创新专项(2019E0223); 新疆高校科研项目(XJEDU2020Y029); 新疆研究生教育教学改革项目(XJ2021GY25); 新疆师范大学“十三五”校级重点学科招标项目(17SDKD0602); 新疆师范大学本科教学研究与改革项目(SDJG2021-12)

Spectrum and Dissociation Characteristics of CHBr3 Molecule Under External Electric Fields

Wumaierjiang NAIPISAI1(), Haokui YAN2, Abulimiti BUMALIYA1,*(), Danqi WANG1,*(), Mei XIANG1, Huan AN1   

  1. 1. College of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi, Xinjiang 830054, China
    2. Xinjiang Research Institute of Measurement & Testing, Urumqi, Xinjiang 830011, China
  • Received:2022-01-10 Online:2022-09-25 Published:2023-01-07
  • Contact: Abulimiti BUMALIYA, Danqi WANG

摘要:

利用密度泛函理论在B3LYP/6-311G++(d, p)基组上优化和计算分析三溴甲烷分子处于外电场中的基态稳定构型, 包括分子结构、总能量、偶极矩、键长、电荷分布、轨道能级、红外光谱和拉曼光谱及解离势能曲线等。结果表明: 随着Y轴(平行于1C-4Br连线)方向外电场的增加(0a.u.~0.02a.u.), 分子总能量减小, 1C-4Br键键长增大, 分子偶极矩增大, 分子能隙逐渐减小, 分子红外光谱呈现蓝移。对解离势能曲线的计算分析发现, 强度为0.02a.u.的外电场使得1C-4Br键断裂而降解, 为三溴甲烷进行外电场降解提供参考依据。

关键词: 三溴甲烷, 密度泛函理论, 外电场, 解离势能

Abstract:

Ground-state configurations of bromomethane molecules under external electric fields were optimized on B3LYP/6-311G++(d, p) basis set using density functional theory. Molecular structure, total energy, dipole moment, bond length, charge distribution, orbital energy level, infrared spectroscopy, Raman spectroscopy and dissociation potential energy curve were analyzed computationally. It shows that with the increase of external electric field (0 a.u. -0.02 a.u.) along Y axis (parallel to the 1C-4Br line), the total molecular energy decreases, the 1C-4Br bond length increases, and the molecular dipole moment increases, the molecular energy gap decreases gradually, and the molecular infrared spectrum exhibits a blue shift. The dissociation potential energy curve shows that an external electric field with a strength of 0.02 a.u. makes the 1C-4Br bond broken and the molecule degraded.

Key words: tribromomethane, density functional theory, external electric field, dissociation potential energy