Electron attachment to complexes of polyaromatic hydrocarbons with O2 and CO2

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F25%3A00637340" target="_blank" >RIV/61388955:_____/25:00637340 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22340/25:43931985
Result on the web
<a href="https://hdl.handle.net/11104/0368246" target="_blank" >https://hdl.handle.net/11104/0368246</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0273532" target="_blank" >10.1063/5.0273532</a>

Result language
angličtina
Original language name
Electron attachment to complexes of polyaromatic hydrocarbons with O2 and CO2
Original language description
Clusters of polycyclic aromatic hydrocarbons (PAHs) doped with guest molecules represent a suitable model system for interstellar dust grains. Here, we investigate the electron-induced chemistry in aggregates of naphthalene, anthracene, and phenanthrene, both when they are pure and when they are doped with O2 and CO2. Clusters are experimentally produced by adiabatic expansion and doped by the molecules in a pickup process, are collided with electrons of controlled energy, and the anionic products are mass analyzed. In pure PAH clusters, a strong influence of the monomer electron affinity is observed. We see a surprising effect in doped clusters: while cluster anions with multiple CO2 molecules [i.e., (PAH) m ( CO 2 ) n - with n > 1] are detected, only anions with one O2 molecule [i.e., (PAH) m O 2 - ] are formed. In addition, the dissociation of oxygen molecules by dissociative electron attachment at 6.5 eV is quenched on PAH clusters and stable superoxide O 2 - is formed. This may influence the efficiency of the depletion of molecular oxygen in astrochemical environments with a high abundance of free electrons.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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