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Fragmentation of polyatomic molecules by grazing incidence surface‐induced dissociation (GI‐SID)
Author(s) -
Wieghaus Andreas,
Schmidt Lothar,
Popova Anna M.,
Komarov Viatcheslav V.,
Jungclas Hartmut
Publication year - 1999
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/(sici)1096-9888(199911)34:11<1178::aid-jms878>3.0.co;2-m
Subject(s) - chemistry , polyatomic ion , fragmentation (computing) , dissociation (chemistry) , molecule , organic chemistry , computer science , operating system
The grazing incidence surface‐induced dissociation (GI‐SID) of n ‐hexadecylpyridinium and verapamil ions generated by fission fragment desorption was studied. These molecules show the effect of enhanced surface‐induced dissociation at grazing incidence as it was observed in former experiments with metal organic ions. A liquid film of perfluorinated polyether is used as collision surface. Small hydrocarbon fragment ions predominate in the GI‐SID spectra. Pyridine ions appear as specific fragment ions in the GI‐SID spectrum of n ‐hexadecylpyridinium. The GI‐SID conversion efficiency varies in the range 40–70%. The experimental results are discussed within the scope of a quantum mechanical model which is based on the accumulation of internal molecular energy by resonant excitation of collective vibrational states and energy transfer to a trap bond due to dipole–dipole interactions. In this context the GI‐SID spectra of n ‐hexadecylpyridinium and verapamil ions are compared with the fragmentation occurring in regular 252 Cf plasma desorption mass spectrometry. Copyright © 1999 John Wiley & Sons, Ltd.