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Majima T, Mizutani S, Mizunami Y, Kitajima K, Tsuchida H, Saito M. Fast-ion-induced secondary ion emission from submicron droplet surfaces studied using a new coincidence technique with forward-scattered projectiles. J Chem Phys 2020; 153:224201. [DOI: 10.1063/5.0032301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- T. Majima
- Department of Nuclear Engineering, Kyoto University, Kyoto 615-8540, Japan
| | - S. Mizutani
- Department of Nuclear Engineering, Kyoto University, Kyoto 615-8540, Japan
| | - Y. Mizunami
- Department of Nuclear Engineering, Kyoto University, Kyoto 615-8540, Japan
| | - K. Kitajima
- Department of Nuclear Engineering, Kyoto University, Kyoto 615-8540, Japan
| | - H. Tsuchida
- Department of Nuclear Engineering, Kyoto University, Kyoto 615-8540, Japan
- Quantum Science and Engineering Center, Kyoto University, Uji 611-0011, Japan
| | - M. Saito
- Department of Nuclear Engineering, Kyoto University, Kyoto 615-8540, Japan
- Quantum Science and Engineering Center, Kyoto University, Uji 611-0011, Japan
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Bodin A, Laloo R, Abeilhou P, Guiraud L, Gauthier S, Martrou D. An energy-filtering device coupled to a quadrupole mass spectrometer for soft-landing molecular ions on surfaces with controlled energy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:095104. [PMID: 24089863 DOI: 10.1063/1.4818961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We have developed an energy-filtering device coupled to a quadrupole mass spectrometer to deposit ionized molecules on surfaces with controlled energy in ultra high vacuum environment. Extensive numerical simulations as well as direct measurements show that the ion beam flying out of a quadrupole exhibits a high-energy tail decreasing slowly up to several hundred eV. This energy distribution renders impossible any direct soft-landing deposition of molecular ions. To remove this high-energy tail by energy filtering, a 127° electrostatic sector and a specific triplet lenses were designed and added after the last quadrupole of a triple quadrupole mass spectrometer. The results obtained with this energy-filtering device show clearly the elimination of the high-energy tail. The ion beam that impinges on the sample surface satisfies now the soft-landing criterion for molecular ions, opening new research opportunities in the numerous scientific domains involving charges adsorbed on insulating surfaces.
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Affiliation(s)
- A Bodin
- Nanosciences Group, CEMES, CNRS UPR 8011 and University Toulouse III - Paul Sabatier, 29 rue Jeanne Marvig, BP94347, F-31055 Toulouse Cedex 4, France
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Cyriac J, Pradeep T, Kang H, Souda R, Cooks RG. Low-Energy Ionic Collisions at Molecular Solids. Chem Rev 2012; 112:5356-411. [DOI: 10.1021/cr200384k] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Jobin Cyriac
- DST Unit of
Nanoscience, Department
of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United
States
| | - T. Pradeep
- DST Unit of
Nanoscience, Department
of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - H. Kang
- Department of Chemistry, Seoul National University, Gwanak-gu, Seoul 151-747,
Republic of Korea
| | - R. Souda
- International
Center for Materials
Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - R. G. Cooks
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United
States
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Solcà N, Dopfer O. Hydrogen-Bonded Networks in Ethanol Proton Wires: IR Spectra of (EtOH)qH+−Ln Clusters (L = Ar/N2, q ≤ 4, n ≤ 5). J Phys Chem A 2005; 109:6174-86. [PMID: 16833957 DOI: 10.1021/jp0514776] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Isolated and microsolvated protonated ethanol clusters, (EtOH)qH+-Ln with L = Ar and N2, are characterized by infrared photodissociation (IRPD) spectroscopy in the 3 microm range and quantum chemical calculations. For comparison, also the spectrum of the protonated methanol dimer, (MeOH)2H+, is presented. The IRPD spectra carry the signature of H-bonded (EtOH)qH+ chain structures, in which the excess proton is either strongly localized on one or (nearly) equally shared between two EtOH molecules, corresponding to Eigen-type ion cores (EtOH2+ for q = 1, 3) or Zundel-type ion cores (EtOH-H+-HOEt for q = 2, 4), respectively. In contrast to neutral (EtOH)q clusters, no cyclic (EtOH)qH+ isomers are detected in the size range investigated (q < or = 4), indicative of the substantial impact of the excess proton on the properties of the H-bonded ethanol network. The acidity of the two terminal OH groups in the (EtOH)qH+ chains decreases with the length of the chain (q). Comparison between (ROH)qH+ with R = CH3 and C2H5 shows that the acidity of the terminal O-H groups increases with the length of the aliphatic rest (R). The most stable (EtOH)qH+-Ln clusters with n < or = 2 feature intermolecular H-bonds between the inert ligands and the two available terminal OH groups of the (EtOH)qH+ chain. Asymmetric microsolvation of (EtOH)qH+ with q = 2 and 4 promotes a switch from Zundel-type to Eigen-type cores, demonstrating that the fundamental structural motif of the (EtOH)qH+ proton wire sensitively depends on the environment. The strength of the H-bonds between L and (EtOH)qH+ is shown to provide a rather sensitive probe of the acidity of the terminal OH groups.
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Affiliation(s)
- Nicola Solcà
- Institute for Physical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
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Solcà N, Dopfer O. IR Spectrum and Structure of Protonated Ethanol Dimer: Implications for the Mobility of Excess Protons in Solution. J Am Chem Soc 2004; 126:9520-1. [PMID: 15291538 DOI: 10.1021/ja047760k] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
This Communication reports IR spectra and density functional calculations for the isolated protonated ethanol dimer and its N2-microsolvated complexes, (EtOH)2H+-(N2)n (n = 0-2) to investigate the degree of delocalization of the excess proton in this fundamental building block of an alcohol proton wire. The first spectroscopic characterization of isolated and microsolvated (EtOH)2H+ suggests that the excess proton is (nearly) equally shared between both EtOH units under symmetric solvation conditions (Zundel-type ion, n = 0 and 2), whereas it is largely localized on a single EtOH molecule for asymmetric solvation (Eigen-type ion, n = 1).
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Affiliation(s)
- Nicola Solcà
- Institute for Physical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
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Qayyum A, Herman Z, Tepnual T, Mair C, Matt-Leubner S, Scheier P, Märk TD. Surface-Induced Dissociation of Polyatomic Hydrocarbon Projectile Ions with Different Initial Internal Energy Content. J Phys Chem A 2003. [DOI: 10.1021/jp030747m] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- A. Qayyum
- Institut für Ionenphysik, Leopold-Franzens Universität, Technikerstr. 25, A-6020 Innsbruck, Austria, V. Ĉermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic, and Department of Plasma Physics, Comenius University, Mlynska dolina, SK-842 48 Bratislava, Slovak Republic
| | - Z. Herman
- Institut für Ionenphysik, Leopold-Franzens Universität, Technikerstr. 25, A-6020 Innsbruck, Austria, V. Ĉermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic, and Department of Plasma Physics, Comenius University, Mlynska dolina, SK-842 48 Bratislava, Slovak Republic
| | - T. Tepnual
- Institut für Ionenphysik, Leopold-Franzens Universität, Technikerstr. 25, A-6020 Innsbruck, Austria, V. Ĉermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic, and Department of Plasma Physics, Comenius University, Mlynska dolina, SK-842 48 Bratislava, Slovak Republic
| | - C. Mair
- Institut für Ionenphysik, Leopold-Franzens Universität, Technikerstr. 25, A-6020 Innsbruck, Austria, V. Ĉermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic, and Department of Plasma Physics, Comenius University, Mlynska dolina, SK-842 48 Bratislava, Slovak Republic
| | - S. Matt-Leubner
- Institut für Ionenphysik, Leopold-Franzens Universität, Technikerstr. 25, A-6020 Innsbruck, Austria, V. Ĉermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic, and Department of Plasma Physics, Comenius University, Mlynska dolina, SK-842 48 Bratislava, Slovak Republic
| | - P. Scheier
- Institut für Ionenphysik, Leopold-Franzens Universität, Technikerstr. 25, A-6020 Innsbruck, Austria, V. Ĉermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic, and Department of Plasma Physics, Comenius University, Mlynska dolina, SK-842 48 Bratislava, Slovak Republic
| | - T. D. Märk
- Institut für Ionenphysik, Leopold-Franzens Universität, Technikerstr. 25, A-6020 Innsbruck, Austria, V. Ĉermák Laboratory, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic, and Department of Plasma Physics, Comenius University, Mlynska dolina, SK-842 48 Bratislava, Slovak Republic
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