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Ion-neutral reaction of the C2H2N+ cation with C2H2: An experimental and theoretical study
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
2016 (English)In: Molecular Astrophysics, ISSN 2405-6758, Vol. 2, p. 1-11Article in journal (Refereed) Published
Abstract [en]

The ion-neutral reactions of the C2H2N+ cation with C2H2 have been investigated using a Guided Ion Beam Mass Spectrometer (GIB-MS). The following ionic products were observed: CH3+, C2H2+, C2H3+, HNC+/HCN+, HCNH+, C3H+, C2N+, C3H3+, HCCNand C4H2N+. Theoretical calculations have been carried out to propose reaction pathways leading to the observed products. These processes are of relevance for the generation of long chain nitrogen-containing species and they may be of interest for the chemistry of Titan’s ionosphere or circumstellar envelopes.

Place, publisher, year, edition, pages
2016. Vol. 2, p. 1-11
Keywords [en]
Astrochemistry, Complex molecules, Ion-neutral reactions, Mass spectrometry, Planetary and satellite atmospheres, Titan
National Category
Atom and Molecular Physics and Optics
Research subject
Chemical Physics
Identifiers
URN: urn:nbn:se:su:diva-167125DOI: 10.1016/j.molap.2015.09.002ISI: 000397267000001OAI: oai:DiVA.org:su-167125DiVA, id: diva2:1297281
Available from: 2019-03-19 Created: 2019-03-19 Last updated: 2019-03-20Bibliographically 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: 2019-04-26Bibliographically approved

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