Premium
Significant differences in site of protonation and extent of fragmentations in chemical ionization and fast atom bombardment mass spectrometry of simple bifunctional compounds. A mechanistic implication for formation of protonated molecules
Author(s) -
Nakata Hisao,
Arakawa Naofumi,
Mizuno Rika
Publication year - 1994
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210290406
Subject(s) - protonation , chemistry , bifunctional , fast atom bombardment , mass spectrometry , chemical ionization , molecule , ionization , proton affinity , mass spectrum , ion , computational chemistry , atom (system on chip) , photochemistry , organic chemistry , catalysis , chromatography , computer science , embedded system
Chemical ionization (CI) and fast atom bombardment (FAB) mass spectra of simple bifunctional aromatic compounds were compared. Some significant differences were revealed with respect to the site of protonation and extent of fragmentations. Unlike conventional CI ionization, the protonated molecule formation by FAB could not be accounted for by ordinary proton transfer reactions in the gas phase. The observed ions under FAB conditions appear to be regulated by proton exchange reactions through frequent collisions in some particular region between the matrix and the gas phase.