高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (7): 960.

• 论文 • 上一篇    下一篇

二甲苯异构体双电荷离子和单电荷离子的动能谱研究

李智立1, 刘淑莹1, 彭家柔2, 张海鹰2   

  1. 1. 中国科学院长春应用化学研究所, 长春, 130022;
    2. 北京医科大学计算分析中心
  • 收稿日期:1991-07-18 出版日期:1992-07-24 发布日期:1992-07-24
  • 通讯作者: 刘淑莹
  • 基金资助:

    国家自然科学基金资助课题.

A Study of Ion Kinetic Energy Spectrometry of Doubly Charged Ions and Singly Charged Ions of o-,m-,p-DimethylBenzenes in Gas Phase

LI Zhi-li1, LIU Shu-ying1, PENG Jia-rou2, ZHANG Hai-ying2   

  1. 1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022;
    2. Central Laboratory of Beijing Medical University, Beijing
  • Received:1991-07-18 Online:1992-07-24 Published:1992-07-24

摘要: 利用质量分析离子动能谱和碰撞诱导解离技采研究了邻、间、对二甲苯分子在电子轰击质谱中产生的双电荷离子[C8H10]2+、[C8H9]2+和单电荷离子[C8H10]+。根据测定的电荷分离反应的释放动能T和由此估算的双电荷离子电荷分离反应过渡态两电荷间距R,推测出过渡态的结构,利用单电荷离子[C8H10]+的MIKES/CID谱可区分邻二甲苯与间、对二甲苯异构体.

关键词: 二甲苯, 双电荷离子, 质量分析离子动能谱, 碰撞诱导解离, 电荷分离

Abstract: With the Mass Analyzed Ion Kinetic Energy Spectrometry (MIKES) and Collision-Induced Dissociation (CID) techniques, the reactions of the doubly charged ions and singly charged ions from o-, m-, p- dimethyl benzenes in the El source have been studied.In terms of the values of the kinetic energy releases (T) of the charge separation reactions of the doubly charged ions and the estimated intercharge distances (R) of the splitting doubly charged ions in their transition structures, some structural information about the transition states can be obtained.It is interesting that MIKES/CIDspectrum of [C8H10], singly charged ion of o-dimethyl benzene is different from those of the others two isomers.

Key words: Dimethyl benzene, Doubly charged ions, Mass analyzed ion kinetic energy spectrom-etry, Collision-induced dissociation, Charge separation

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