✦ LIBER ✦

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

✍ Scribed by Hisao Nakata; Naofumi Arakawa; Rika Mizuno

Publisher: John Wiley and Sons
Year: 1994
Tongue: English
Weight: 451 KB
Volume: 29
Category: Article
ISSN: 1076-5174
DOI: 10.1002/oms.1210290406

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✦ Synopsis

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.

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