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Dependence on the Initial Configuration of Strong Field-Driven Isomerization of C 2 H 2 Cations and Anions.

Authors :
Jochim B
Berry B
Severt T
Feizollah P
Zohrabi M
P KR
Wells E
Carnes KD
Ben-Itzhak I
Source :
The journal of physical chemistry letters [J Phys Chem Lett] 2019 May 16; Vol. 10 (10), pp. 2320-2327. Date of Electronic Publication: 2019 Apr 25.
Publication Year :
2019

Abstract

We have investigated the femtosecond laser-induced fragmentation of C <subscript>2</subscript> H <subscript>2</subscript> <superscript>q</superscript> ion beam targets in various initial configurations, including acetylene (linear HCCH), vinylidene (H <subscript>2</subscript> CC), and cis/ trans. The initial configuration is shown to have a tremendous impact on the branching ratio of acetylene-like (CH <superscript>q <subscript>1</subscript> </superscript> + CH <superscript>q <subscript>2</subscript> </superscript> ) and vinylidene-like (C <superscript>q <subscript>1</subscript> '</superscript> + CH <subscript>2</subscript> <superscript>q <subscript>2</subscript> '</superscript> ) dissociation of a specific C <subscript>2</subscript> H <subscript>2</subscript> <superscript>q</superscript> molecular ion. In particular, whereas C <subscript>2</subscript> H <subscript>2</subscript> <superscript>+</superscript> generated from C <subscript>2</subscript> H <subscript>2</subscript> , a linear HCCH target, exhibits comparable levels of acetylene-like and vinylidene-like fragmentation, vinylidene or cis/ trans configuration ion beams preferably undergo vinylidene-like fragmentation, with an acetylene branching ratio ranging from 13.9% to zero.

Details

Language :
English
ISSN :
1948-7185
Volume :
10
Issue :
10
Database :
MEDLINE
Journal :
The journal of physical chemistry letters
Publication Type :
Academic Journal
Accession number :
31002520
Full Text :
https://doi.org/10.1021/acs.jpclett.9b00520