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Isomer effects in fragmentation of Polycyclic Aromatic Hydrocarbons
Stockholm University, Faculty of Science, Department of Physics. Aarhus University, Denmark.
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
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Number of Authors: 14
2015 (English)In: International Journal of Mass Spectrometry, ISSN 1387-3806, E-ISSN 1873-2798, Vol. 392, 58-62 p.Article in journal (Refereed) Published
Abstract [en]

We have observed significant differences in the fragmentation patterns of isomeric Polycyclic Aromatic Hydrocarbon (PAH) cations following collisions with helium atoms at center-of-mass energies around 100 eV. This is in contrast to the situation at other collision energies or in photo-absorption experiments where isomeric effects are very weak and where the lowest-energy dissociation channels (H- and C2H2-loss) domihate in statistical fragmentation processes. In the 100 eV range, non-statistical fragmentation also competes and is uniquely linked to losses of single carbon atoms (CHx-losses). We find that such CHx-losses are correlated with the ionic ground state energy within a given group of isomers. We present results for three C16H10+, four C18H12+ and five C20H12+ isomers colliding with He.

Place, publisher, year, edition, pages
2015. Vol. 392, 58-62 p.
Keyword [en]
Polycyclic Aromatic Hydrocarbons, Isomers, Non-statistical fragmentation
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-125655DOI: 10.1016/j.ijms.2015.09.005ISI: 000366441700010OAI: oai:DiVA.org:su-125655DiVA: diva2:895113
Available from: 2016-01-18 Created: 2016-01-15 Last updated: 2016-01-18Bibliographically approved

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Stockett, Mark H.Gatchell, Michaelde Ruette, NathalieGiacomozzi, LindaChen, TaoSchmidt, Henning T.Zettergren, HenningCederquist, Henrik
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