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Ion-neutral reaction of C2H2N+ with CH4: An experimental and theoretical study
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: 52016 (English)In: Molecular Astrophysics, ISSN 2405-6758, Vol. 5, p. 9-22Article in journal (Refereed) Published
Abstract [en]

The current study was undertaken to probe the ionic products of the ion-neutral reaction of C2H2N+ with CH4 using guided ion beam mass spectrometry (GIB-MS) in which the CH3+, C2H3+, HCNH+, C2H5+, C2H3N+ and C3H4N+ ions are identified as products. Theoretical calculations were performed to suggest reaction pathways leading to the detected products. These processes might be of relevance for the generation of long chain carbon-nitrogen bearing compounds in Titan's atmosphere, the interstellar medium or circumstellar envelopes.

Place, publisher, year, edition, pages
2016. Vol. 5, p. 9-22
Keywords [en]
Astrochemistry, Complex molecules, Ion-neutral reactions, Mass spectrometry, Planetary and satellite atmospheres, Titan
National Category
Physical Sciences
Research subject
Chemical Physics
Identifiers
URN: urn:nbn:se:su:diva-142426DOI: 10.1016/j.molap.2016.07.001ISI: 000397268100002OAI: oai:DiVA.org:su-142426DiVA, id: diva2:1092426
Available from: 2017-05-02 Created: 2017-05-02 Last updated: 2019-03-27Bibliographically approved
In thesis
1. Synthesis of complex organics via molecular growth mechanisms: Combined experimental and theoretical studies on ion-neutral reactions of C2H2N+ with ubiquitous hydrocarbons in Titan's ionosphere
Open this publication in new window or tab >>Synthesis of complex organics via molecular growth mechanisms: Combined experimental and theoretical studies on ion-neutral reactions of C2H2N+ with ubiquitous hydrocarbons in Titan's ionosphere
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

To provide insights on the molecular growth mechanisms leading to large carbon and nitrogen-bearing species in Titan’s ionosphere, laboratory measurements of ion-neutral reactions were conducted and the results are presented in the following doctoral dissertation. The product ions of the C2H2N+ reactions with saturated and unsaturated neutral hydrocarbons have been investigated using Guided Ion Beam Mass Spectrometer (GIB-MS). The data have been used to reveal the dependence of product ion intensity on pressure and also with respect to collision energy variations to derive useful insights on the nature of chemical reactions leading to the observed species. Complementary theoretical calculations have been also carried out to assist in interpretation of these measurements and to elucidate the reaction schemes. This study provides comprehensive insights on the formation of long chain and heavy carbon-nitrogen bearing species through exothermic and barrierless ion-neutral reactions which are likely to play a significant role in the formation routes of heavy positive ions of interest, which have been detected in Titan’s ionosphere by Cassini’s Ion Neutral Mass Spectrometer (INMS).

Place, publisher, year, edition, pages
Stockholm: Department of Physics, Stockholm University, 2019. p. 69
Keywords
Astrochemistry, Complex molecules, Ion-neutral reactions, Mass spectrometry, Planetary and satellite atmospheres, Titan
National Category
Physical Sciences Atom and Molecular Physics and Optics
Research subject
Chemical Physics
Identifiers
urn:nbn:se:su:diva-167136 (URN)978-91-7797-702-5 (ISBN)978-91-7797-703-2 (ISBN)
Public defence
2019-06-04, room 132:028, Nordita East Building, Roslagstullsbacken 23, Stockholm, 09:00 (English)
Opponent
Supervisors
Note

At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Submitted.

Available from: 2019-04-26 Created: 2019-03-19 Last updated: 2020-05-12Bibliographically approved

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