Isomer effects in fragmentation of Polycyclic Aromatic Hydrocarbons
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
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.
Polycyclic Aromatic Hydrocarbons, Isomers, Non-statistical fragmentation
IdentifiersURN: urn:nbn:se:su:diva-125655DOI: 10.1016/j.ijms.2015.09.005ISI: 000366441700010OAI: oai:DiVA.org:su-125655DiVA: diva2:895113