Stabilization of benzene radical anion in ammonia clusters

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F22%3A00564249" target="_blank" >RIV/61388955:_____/22:00564249 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0335952" target="_blank" >https://hdl.handle.net/11104/0335952</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/D2CP02979K" target="_blank" >10.1039/D2CP02979K</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stabilization of benzene radical anion in ammonia clusters

Popis výsledku v původním jazyce

We investigate electron attachment to large ammonia clusters doped with a single benzene (Bz) molecule (NH3)N·Bz, [N with combining macron] ≈ 320. Negatively charged clusters are probed by mass spectrometry, and the energy-dependent ion yields are derived from mass spectra measured at different electron energies. The ion efficiency curves of pure ammonia clusters exhibit two maxima. At around 6 eV, (NH3)n−1NH2− ions are produced via dissociative electron attachment (DEA) to NH3 molecules. (NH3)n− ions produced at this energy are formed by DEA followed by fragment caging. At low energies around 1.3 eV, only (NH3)n− ions are formed for cluster sizes n ≥ 35 that correspond to solvated electrons in ammonia clusters. The doped (NH3)n·Bz− cluster ions exhibit essentially the same energy dependence. The (NH3)n·Bz− ions are metastable and evaporate NH3 molecule(s), while pure (NH3)n− ions are stable. The lifetime for NH3 molecule evaporation from the Bz-doped clusters was estimated as τ ≈ 18 μs. We interpret the metastability of the doped clusters by the charge localization on a Bz− ion solvated in the ammonia, which is accompanied by an energy release leading to the evaporation of NH3 molecule(s).n

Název v anglickém jazyce

Stabilization of benzene radical anion in ammonia clusters

Popis výsledku anglicky

We investigate electron attachment to large ammonia clusters doped with a single benzene (Bz) molecule (NH3)N·Bz, [N with combining macron] ≈ 320. Negatively charged clusters are probed by mass spectrometry, and the energy-dependent ion yields are derived from mass spectra measured at different electron energies. The ion efficiency curves of pure ammonia clusters exhibit two maxima. At around 6 eV, (NH3)n−1NH2− ions are produced via dissociative electron attachment (DEA) to NH3 molecules. (NH3)n− ions produced at this energy are formed by DEA followed by fragment caging. At low energies around 1.3 eV, only (NH3)n− ions are formed for cluster sizes n ≥ 35 that correspond to solvated electrons in ammonia clusters. The doped (NH3)n·Bz− cluster ions exhibit essentially the same energy dependence. The (NH3)n·Bz− ions are metastable and evaporate NH3 molecule(s), while pure (NH3)n− ions are stable. The lifetime for NH3 molecule evaporation from the Bz-doped clusters was estimated as τ ≈ 18 μs. We interpret the metastability of the doped clusters by the charge localization on a Bz− ion solvated in the ammonia, which is accompanied by an energy release leading to the evaporation of NH3 molecule(s).n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA21-07062S" target="_blank" >GA21-07062S: Klastry PAH v laboratorním výzkumu astrochemických a atmosférických procesů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Chemistry Chemical Physics

ISSN

1463-9076

e-ISSN

1463-9084

Svazek periodika

24

Číslo periodika v rámci svazku

44

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

27128-27135

Kód UT WoS článku

000880786200001

EID výsledku v databázi Scopus

2-s2.0-85142272285