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Comparison of collision‐ versus electron‐induced dissociation of sodium chloride cluster cations
Author(s) -
Feketeová Linda,
O'Hair Richard A. J.
Publication year - 2009
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.3856
Subject(s) - chemistry , ion , dissociation (chemistry) , fourier transform ion cyclotron resonance , sodium , chloride , cluster (spacecraft) , mass spectrum , collision induced dissociation , mass spectrometry , analytical chemistry (journal) , electron ionization , ionization , tandem mass spectrometry , organic chemistry , chromatography , computer science , programming language
The collision‐induced dissociation (CID) and electron‐induced dissociation (EID) spectra of the [(NaCl) m (Na) n ] n+ clusters of sodium chloride have been examined in a hybrid linear ion trap Fourier transform ion cyclotron resonance mass spectrometer. For singly charged cluster ions (n = 1), mass spectra for CID and EID of the precursor exhibit clear differences, which become more pronounced for the larger cluster ions. Whereas CID yields fewer product ions, EID produces all possible [(NaCl) x Na] + product ions. In the case of doubly charged cluster ions, EID again leads to a larger variety of product ions. In addition, doubly charged product ions have been observed due to loss of neutral NaCl unit(s). For example, EID of [(NaCl) 11 (Na) 2 ] 2+ leads to formation of [(NaCl) 10 (Na) 2 ] 2+ , which appears to be the smallest doubly charged cluster of sodium chloride observed experimentally to date. The most abundant product ions in EID spectra are predominantly magic number cluster ions. Finally, [(NaCl) m (Na) 2 ] + . radical cations, formed via capture of low‐energy electrons, fragment via the loss of [(NaCl) n (Na)] . radical neutrals. Copyright © 2008 John Wiley & Sons, Ltd.