CJCU

Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (9): 1270.

• Articles • Previous Articles     Next Articles

Fragmentations of Some Doubly Charged Ions in the Gas Phase

ZHAN Dong-Liang1, ZHU Yu-Fen1, LIU Shu-Ying2, XIN Bao-Min2, JIA Wei-Ping2, ZHANG Fa-Yi3, HUANG Cheng-Yi3, SUN Hong-Wei3   

  1. 1. Guangzhou Institute of Chemistry, Academia Sinica, Guangzhou;
    2. Chuangchun Institute of Applied Chemistry, Academia Sinica, Changchun, 130022;
    3. Central Laboratory, Naikai University, Tianjin
  • Received:1992-10-29 Revised:1993-03-21 Online:1993-09-24 Published:1993-09-24

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Abstract: The unimolecular fragmentation and collision-induced dissociation (CID) of doubly charged ions generated by electron impact (EI) were studied by mass analyzed ion kinetic energy spectrometry(MIKES) and tandem mass spectrometry(MS/MS).The factors leading to the differences between the experimental results from above two methods mainly include ion kinetic energy and analyzer types.In addition, the intercharge distances of doubly charged ions at the moment of fragmentation were approximately calculated on the basis of the kinetic energy releases given by MIKESfor charge separation reactions, which can be used to distinguish the transition structures of doubly charged ions fragmenting in different charge separaton ways.

Key words: Doubly charged ions, Mass analyzed ion kinetic spectrometry (MIKES), Tandem mass spectrometry(MS/MS), Anilines, Nitrobenzenes

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