Dissociative recombination cross section and branching ratios of protonated dimethyl disulfide and N-methylacetamide

A. Ai-Khaiili*, R. Thomas, A. Ehlerding, F. Hellberg, W. D. Geppert, V. Zhaunerchyk, M. Af Ugglas, M. Larsson, E. Uggerud, J. Vedde, C. Adlhart, J. Semaniak, M. Kamińska, R. A. Zubarev, F. Kjeldsen, P. U. Andersson, F. Österdahl, V. A. Bednarska, A. Paál

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The disscoiative ion-electron recombination (DR) cross section and branching ratios in protonated dimethyl disulfide (DMDS) and N-methylacetamide, were analyzed at electron energies ranging from 0.001 to 0.3 eV. The protonated molecules of DMDS and N-methylacetamide-2,2,2-d3 were used to measure DR branching ratios at 0 eV collision energy. It was observed that cleavage of CSS-C bond was most dominant channel in the protonated DMDS. The dominant channel for recombination of protonated N-methylacetamide-2,2,2-dI3I results in production of a hydrogen atom. The results show that protonated proteins may release hydrogens upon electron capture dissociation (ECD) and some of the cleavages observed are hydrogen capture induced.

Original languageEnglish
JournalJournal of Chemical Physics
Volume121
Issue number12
Pages (from-to)5700-5708
Number of pages9
ISSN0021-9606
DOIs
Publication statusPublished - 22. Sep 2004

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