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Collision‐induced dissociation study of poly(2‐ethyl‐2‐oxazoline) using survival yields and breakdown curves
Author(s) -
Biri Bernadett,
Nagy Lajos,
Kuki Ákos,
Tőke Enikő Rita,
Deák György,
Zsuga Miklós,
Kéki Sándor
Publication year - 2013
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/jms.3105
Subject(s) - chemistry , oxazoline , dissociation (chemistry) , collision , collision induced dissociation , computational chemistry , chromatography , organic chemistry , mass spectrometry , tandem mass spectrometry , computer science , catalysis , computer security
Poly(2‐ethyl‐2‐oxazoline), a synthetic polymer was analysed by mass spectrometry using different ion sources. Two distributions could be identified in the mass spectra which related to two different polymer series (one with hydrogen and hydroxyl end‐groups and the other with methyl and hydroxyl end‐groups). The fragmentation behaviour of the protonated oligomers was studied in a quadrupole time‐of‐flight mass spectrometer (MS) with electrospray, atmospheric pressure chemical ionization and direct analysis in real time soft ionization techniques. Three product ion series were identified in the MS/MS spectra independently of the ion source used. Based on the results, a mechanism was proposed for the dissociation by means of the accurate mass of the product ions, pseudo MS 3 experiments and the energy dependence of the product ion intensity, i.e. breakdown curves. The survival yield method was used to highlight the correlation between the size of the oligomers and the laboratory frame collision energy. Copyright © 2012 John Wiley & Sons, Ltd.