Počet záznamů: 1
Stabilization of benzene radical anion in ammonia clusters
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SYSNO ASEP 0564249 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Stabilization of benzene radical anion in ammonia clusters Tvůrce(i) Pysanenko, Andriy (UFCH-W) RID, ORCID
Bergmeister, S. (AT)
Scheier, P. (AT)
Fárník, Michal (UFCH-W) RID, ORCIDZdroj.dok. Physical Chemistry Chemical Physics. - : Royal Society of Chemistry - ISSN 1463-9076
Roč. 24, č. 44 (2022), s. 27128-27135Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova photoelectron spectroscopy ; solvated electrons ; mass spectra Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Obor OECD Physical chemistry CEP GA21-07062S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000880786200001 EID SCOPUS 85142272285 DOI 10.1039/D2CP02979K Anotace 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).
Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2023 Elektronická adresa https://hdl.handle.net/11104/0335952
Počet záznamů: 1