高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (12): 2314.

• 研究论文 • 上一篇    下一篇

氟里昂134a的真空紫外光电离和光解离的同步辐射研究

黄超群1,杨斌1,杨锐1,卫立夏1,王思胜1,单晓斌1,齐飞1,张允武1,盛六四1,郝立庆2,周士康2,王振亚2   

  1. 1.中国科学技术大学国家同步辐射实验室,合肥230029;
    2.中国科学院安徽光学精密机械研究所环境光谱学实验室,合肥230031
  • 收稿日期:2004-11-17 出版日期:1905-03-14 发布日期:1905-03-14
  • 通讯作者: 盛六四(1954年出生),男,研究员,博士生导师,主要从事分子反应动力学研究.E-mail:lssheng@ustc.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:20273064)及中国科学院知识创新项目资助.

Synchrotron Radiation Study of Photoionization and Photodissociation of Freon HFC-134a

HUANG Chao-Qun1,YANG Bin1,YANG Rui1,WEI Li-Xia1,WANG Si-Sheng1,SHAN Xiao-Bin1,QI Fei1,ZHANG Yun-Wu1,SHENG Liu-Si1*, HAO Li-Qing2, ZHOU Shi-Kang2, WANG Zhen-Ya2   

  1. 1.  National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China;
    2.  Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei  230031, China
  • Received:2004-11-17 Online:1905-03-14 Published:1905-03-14
  • Contact: SHENG Liu-Si;E-mail:lssheng@ustc.edu.cn

摘要:

利用同步辐射真空紫外光研究了氟里昂134a(CH2FCF3)的光电离和光解离过程,通过测量各离子的光电离效率曲线,得到了该分子的电离能(12.68±0.04)eV和所有碎片离子的出现势,运用Gaussian-03计算了母体和中性碎片及相应离子的电子态、对称性和能量.结合理论计算结果对离子出现势的理论值和实验值进行了比较,分析了母体离子可能的光解离通道.

关键词: 氟里昂134a;光电离;电离能;出现势;离解能, 氟里昂134a, 光电离, 电离能, 出现势, 离解能

Abstract:

Photoionization and  photodissociation of HFC-134a were  studied by using synchrotron radiation and a reflectron time-of-flight mass spectrometry(RTOF-MS).  The ionization energy of parent molecule(12. 68±0. 04) eV and appearance potentials of various fragment ions were determined by measuring their photoionization efficiency curves.  Energies, symmetry point groups and ground electronic states of the neutrals and cations of parent and its fragments were calculated by Gaussian-03 program with the G3 method.  According to the theoretical and experimental results, some dissociation channels and their dissociation energies of CH2FCF+3 were analyzed.

Key words: Freon HFC-134a; Photoionization; Ionization energy; Appearance potential; Dissociation energy, Freon HFC-134a, Photoionization, Ionization energy, Appearance potential, Dissociation energy

中图分类号: 

TrendMD: