Fragmentation and charge transfer in gas-phase complexes of divalent metal ions with acetonitrile

被引:41
|
作者
Shvartsburg, AA
Wilkes, JG
Lay, JO
Siu, KWM
机构
[1] Natl Ctr Toxicol Res, Div Chem, Jefferson, AR 72079 USA
[2] York Univ, Dept Chem, Toronto, ON M3J 1P3, Canada
[3] York Univ, Ctr Res Mass Spectrometry, Toronto, ON M3J 1P3, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
D O I
10.1016/S0009-2614(01)01278-7
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The development of electrospray has enabled generation of gas-phase multiply charged metal ion complexes with various solvent molecules, These species exhibit rich fragmentation chemistry, involving competition among neutral ligand loss, ligand cleavage, and dissociative electron and proton transfer. Acetonitrile is a common aprotic solvent. Here we present a comprehensive MS/MS study on acetonitrile complexes of divalent metal cations. We measured the critical sizes below which dissociation channels other than the trivial neutral evaporation become operative and minimum sizes at which dications remain stable against charge reduction. For all sizes between the two, low-energy fragmentation patterns have been elucidated in detail. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:216 / 224
页数:9
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