Laser-induced fragmentation of coronene cations
| Autor: | Panchagnula, S., Kamer, J., Candian, A., Hrodmarsson, H. R., Linnartz, H., Bouwman, J., Tielens, A. G. G. M. |
|---|---|
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Phys. Chem. Chem. Phys., 2024,26, 18557-18570 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1039/D4CP01301H |
| Popis: | Polycyclic aromatic hydrocarbons are an important component of the interstellar medium of galaxies and photochemistry plays a key role in the evolution of these species in space. Here, we explore the photofragmentation behaviour of the coronene cation (C24H12+) using time of flight mass spectrometry. The experiments show photodissociation fragmentation channels including the formation of bare carbon clusters (Cn+) and hydrocarbon chains (CnHx+). The mass spectrum of coronene is dominated by peaks from C11+ and C7H+. Density functional theory was used to calculate relative energies, potential dissociation pathways, and possible structures for relevant species. We identify 6-6 to 5-7 ring isomerisation as a key step in the formation of both the bare carbon clusters and the hydrocarbon chains observed in this study. We present the dissociation mechanism outlined here as a potential formation route for C60 and other astrochemically relevant species. Comment: 17 pages, 12 figure. Version submitted after referee report to PCCP. Supplementary information available at https://www.rsc.org/suppdata/d4/cp/d4cp01301h/d4cp01301h1.pdf |
| Databáze: | arXiv |
| Externí odkaz: |
|