Structural Elucidation of β-Lactam Diastereoisomers through Ion Mobility Mass Spectrometry Studies and Theoretical Calculations.

TitleStructural Elucidation of β-Lactam Diastereoisomers through Ion Mobility Mass Spectrometry Studies and Theoretical Calculations.
Publication TypeJournal Article
Year of Publication2016
AuthorsTroć, Anna, Zimnicka Magdalena, Koliński Michał, and Danikiewicz Witoln
JournalJ Mass Spectrom
Volume51
Issue4
Pagination282-90
Date Published2016 Apr
ISSN1096-9888
Abstract<p>The ion mobility combined with mass spectrometry and theoretical calculations were used to characterize and separate six diastereoisomeric β-lactams. The influence of traveling wave height and wave velocity, size of the alkali metal ion (Li(+) , Na(+) and K(+) ) and drift gases with varying masses and polarizabilities (N2 and CO2 ) on separation efficacy was additionally examined. The best separation of diastereoisomers of β-lactams was observed for adducts with Na(+) and Li(+) ions, whereas other parameters had little impact on separation process. The isomeric β-lactams were characterized by both experimental and theoretical collision cross sections. The theoretically calculated values of collision cross sections obtained from extensive molecular dynamics and density functional theory calculations for model structures agreed well with those established experimentally. The relationship between separation efficacy and the configuration at the carbon atoms C5 and C6 of β-lactam ring was defined. Copyright © 2016 John Wiley & Sons, Ltd.</p>
DOI10.1002/jms.3749
Alternate JournalJ Mass Spectrom
PubMed ID27041658