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Title: Energy and charge transfer in ionized argon coated water clusters

Abstract

We investigate the electron ionization of clusters generated in mixed Ar-water expansions. The electron energy dependent ion yields reveal the neutral cluster composition and structure: water clusters fully covered with the Ar solvation shell are formed under certain expansion conditions. The argon atoms shield the embedded (H{sub 2}O){sub n} clusters resulting in the ionization threshold above ≈15 eV for all fragments. The argon atoms also mediate more complex reactions in the clusters: e.g., the charge transfer between Ar{sup +} and water occurs above the threshold; at higher electron energies above ∼28 eV, an excitonic transfer process between Ar{sup +}* and water opens leading to new products Ar{sub n}H{sup +} and (H{sub 2}O){sub n}H{sup +}. On the other hand, the excitonic transfer from the neutral Ar* state at lower energies is not observed although this resonant process was demonstrated previously in a photoionization experiment. Doubly charged fragments (H{sub 2}O){sub n}H{sub 2}{sup 2+} and (H{sub 2}O){sub n}{sup 2+} ions are observed and Intermolecular Coulomb decay (ICD) processes are invoked to explain their thresholds. The Coulomb explosion of the doubly charged cluster formed within the ICD process is prevented by the stabilization effect of the argon solvent.

Authors:
Publication Date:
OSTI Identifier:
22251290
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 139; Journal Issue: 21; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ARGON; ARGON IONS; ELECTRONS; ENERGY DEPENDENCE; NITROGEN IONS; PHOTOIONIZATION; SOLVATION; SOLVENTS; WATER

Citation Formats

Kočišek, J., E-mail: kocisek@jh-inst.cas.cz, E-mail: michal.farnik@jh-inst.cas.cz, E-mail: petr.slavicek@vscht.cz, Lengyel, J., Fárník, M., E-mail: kocisek@jh-inst.cas.cz, E-mail: michal.farnik@jh-inst.cas.cz, E-mail: petr.slavicek@vscht.cz, and Slavíček, P., E-mail: kocisek@jh-inst.cas.cz, E-mail: michal.farnik@jh-inst.cas.cz, E-mail: petr.slavicek@vscht.cz. Energy and charge transfer in ionized argon coated water clusters. United States: N. p., 2013. Web. doi:10.1063/1.4834715.
Kočišek, J., E-mail: kocisek@jh-inst.cas.cz, E-mail: michal.farnik@jh-inst.cas.cz, E-mail: petr.slavicek@vscht.cz, Lengyel, J., Fárník, M., E-mail: kocisek@jh-inst.cas.cz, E-mail: michal.farnik@jh-inst.cas.cz, E-mail: petr.slavicek@vscht.cz, & Slavíček, P., E-mail: kocisek@jh-inst.cas.cz, E-mail: michal.farnik@jh-inst.cas.cz, E-mail: petr.slavicek@vscht.cz. Energy and charge transfer in ionized argon coated water clusters. United States. https://doi.org/10.1063/1.4834715
Kočišek, J., E-mail: kocisek@jh-inst.cas.cz, E-mail: michal.farnik@jh-inst.cas.cz, E-mail: petr.slavicek@vscht.cz, Lengyel, J., Fárník, M., E-mail: kocisek@jh-inst.cas.cz, E-mail: michal.farnik@jh-inst.cas.cz, E-mail: petr.slavicek@vscht.cz, and Slavíček, P., E-mail: kocisek@jh-inst.cas.cz, E-mail: michal.farnik@jh-inst.cas.cz, E-mail: petr.slavicek@vscht.cz. 2013. "Energy and charge transfer in ionized argon coated water clusters". United States. https://doi.org/10.1063/1.4834715.
@article{osti_22251290,
title = {Energy and charge transfer in ionized argon coated water clusters},
author = {Kočišek, J., E-mail: kocisek@jh-inst.cas.cz, E-mail: michal.farnik@jh-inst.cas.cz, E-mail: petr.slavicek@vscht.cz and Lengyel, J. and Fárník, M., E-mail: kocisek@jh-inst.cas.cz, E-mail: michal.farnik@jh-inst.cas.cz, E-mail: petr.slavicek@vscht.cz and Slavíček, P., E-mail: kocisek@jh-inst.cas.cz, E-mail: michal.farnik@jh-inst.cas.cz, E-mail: petr.slavicek@vscht.cz},
abstractNote = {We investigate the electron ionization of clusters generated in mixed Ar-water expansions. The electron energy dependent ion yields reveal the neutral cluster composition and structure: water clusters fully covered with the Ar solvation shell are formed under certain expansion conditions. The argon atoms shield the embedded (H{sub 2}O){sub n} clusters resulting in the ionization threshold above ≈15 eV for all fragments. The argon atoms also mediate more complex reactions in the clusters: e.g., the charge transfer between Ar{sup +} and water occurs above the threshold; at higher electron energies above ∼28 eV, an excitonic transfer process between Ar{sup +}* and water opens leading to new products Ar{sub n}H{sup +} and (H{sub 2}O){sub n}H{sup +}. On the other hand, the excitonic transfer from the neutral Ar* state at lower energies is not observed although this resonant process was demonstrated previously in a photoionization experiment. Doubly charged fragments (H{sub 2}O){sub n}H{sub 2}{sup 2+} and (H{sub 2}O){sub n}{sup 2+} ions are observed and Intermolecular Coulomb decay (ICD) processes are invoked to explain their thresholds. The Coulomb explosion of the doubly charged cluster formed within the ICD process is prevented by the stabilization effect of the argon solvent.},
doi = {10.1063/1.4834715},
url = {https://www.osti.gov/biblio/22251290}, journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 21,
volume = 139,
place = {United States},
year = {Sat Dec 07 00:00:00 EST 2013},
month = {Sat Dec 07 00:00:00 EST 2013}
}