The kinetic energy of PAH dication and trication dissociation determined by recoil-frame covariance map imaging.
Journal
Physical chemistry chemical physics : PCCP
ISSN: 1463-9084
Titre abrégé: Phys Chem Chem Phys
Pays: England
ID NLM: 100888160
Informations de publication
Date de publication:
05 Oct 2022
05 Oct 2022
Historique:
pubmed:
26
7
2022
medline:
26
7
2022
entrez:
25
7
2022
Statut:
epublish
Résumé
We investigated the dissociation of dications and trications of three polycyclic aromatic hydrocarbons (PAHs), fluorene, phenanthrene, and pyrene. PAHs are a family of molecules ubiquitous in space and involved in much of the chemistry of the interstellar medium. In our experiments, ions are formed by interaction with 30.3 nm extreme ultraviolet (XUV) photons, and their velocity map images are recorded using a PImMS2 multi-mass imaging sensor. Application of recoil-frame covariance analysis allows the total kinetic energy release (TKER) associated with multiple fragmentation channels to be determined to high precision, ranging 1.94-2.60 eV and 2.95-5.29 eV for the dications and trications, respectively. Experimental measurements are supported by Born-Oppenheimer molecular dynamics (BOMD) simulations.
Identifiants
pubmed: 35876592
doi: 10.1039/d2cp02252d
pmc: PMC9533308
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
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