高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (2): 264.

• 论文 • 上一篇    下一篇

二溴甲烷的同步辐射光电离研究

李全新1, 冉琴1, 陈从香1, 盛六四2, 俞书勤1, 张允武2, 马兴孝1   

  1. 1. 中国科学技术大学化学物理系, 合肥 230026;
    2. 中国科学技术大学国家同步辐射实验室, 合肥 230026
  • 收稿日期:1995-04-10 出版日期:1996-02-24 发布日期:1996-02-24
  • 通讯作者: 马兴孝
  • 作者简介:李全新,男,31岁,博士.讲师.
  • 基金资助:

    国家自然科学基金

Photoinization Studies of Dibromomethane Using Synchrotron Radiation

LI Quan-Xin1, RAN Qin1, CHEN Cong-Xiang1, SHENG Liu-Si2, YU Shu-Qin1, ZHANG Yun-Wu2, MA Xing-Xiao1   

  1. 1. Department of Chemical Physics, University of Science and Technology of China, Hefei 320026;
    2. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 320026
  • Received:1995-04-10 Online:1996-02-24 Published:1996-02-24

PDF (PC)

被引次数

4

摘要： 采用50～200nm同步辐射光,对CH2Br2的光电离过程进行了研究。根据测定的母体离子及其碎片离子出现势,得到二溴甲烷的绝热电离势为10.23±0.01eV,并获得了离子的生成焓、解离能及键能等热力学数据,分析了碎片离子的光解离电离通道。

关键词: 光电离, 光解离电离, 出现势

Abstract: The photoionization processes of dibromomethane have been investigated in the wavelength range 50～200 nm of synchrotron radiation.Based on the measured appearance potential(PA) of the parent ion.the adiabatic ionization potential(P1=10.23±0.01 eV) of the dibromomethane was obtained.Furtheremore,the dissociation energies(ED),the formation enthalpies(EF),the bond dissociation energies(EBD)and the related thermochemical data of the species have been derived from the observed appearance potentials of the ionic fragments,Associating the obtained hats of formation with the previous thermochemical data,the most possible chnnels of dissociative photoionization have been analysed.

Key words: Photoionization, Photodissociation ionization, Appearance potential

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