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García-Alfonso E, Barranco M, Halberstadt N, Pi M. Time-resolved solvation of alkali ions in superfluid helium nanodroplets. J Chem Phys 2024; 160:164308. [PMID: 38651804 DOI: 10.1063/5.0205951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 03/29/2024] [Indexed: 04/25/2024] Open
Abstract
The sinking of alkali cations in superfluid 4He nanodroplets is investigated theoretically using liquid 4He time-dependent density functional theory at zero temperature. The simulations illustrate the dynamics of the buildup of the first solvation shell around the ions. The number of helium atoms in this shell is found to linearly increase with time during the first stages of the dynamics. This points to a Poissonian capture process, as concluded in the work of Albrechtsen et al. on the primary steps of Na+ solvation in helium droplets [Albrechtsen et al., Nature 623, 319 (2023)]. The energy dissipation rate by helium atom ejection is found to be quite similar between all alkalis, the main difference being a larger energy dissipated per atom for the lighter alkalis at the beginning of the dynamics. In addition, the number of helium atoms in the first solvation shell is found to be lower at the end of the dynamics than at equilibrium for both Li+ and Na+, pointing to a kinetic rather than thermodynamical control of the snowball size for small and strongly attractive ions.
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Affiliation(s)
- Ernesto García-Alfonso
- Laboratoire Collisions, Agrégats, Réactivité (LCAR), Université de Toulouse, CNRS, 31062 Toulouse, France
| | - Manuel Barranco
- Departament FQA, Facultat de Física, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, Barcelona, Spain
| | - Nadine Halberstadt
- Laboratoire Collisions, Agrégats, Réactivité (LCAR), Université de Toulouse, CNRS, 31062 Toulouse, France
| | - Martí Pi
- Departament FQA, Facultat de Física, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, Barcelona, Spain
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2
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Albrechtsen SH, Schouder CA, Viñas Muñoz A, Christensen JK, Engelbrecht Petersen C, Pi M, Barranco M, Stapelfeldt H. Observing the primary steps of ion solvation in helium droplets. Nature 2023; 623:319-323. [PMID: 37938709 DOI: 10.1038/s41586-023-06593-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 08/31/2023] [Indexed: 11/09/2023]
Abstract
Solvation is a ubiquitous phenomenon in the natural sciences. At the macroscopic level, it is well understood through thermodynamics and chemical reaction kinetics1,2. At the atomic level, the primary steps of solvation are the attraction and binding of individual molecules or atoms of a solvent to molecules or ions of a solute1. These steps have, however, never been observed in real time. Here we instantly create a single sodium ion at the surface of a liquid helium nanodroplet3,4, and measure the number of solvent atoms that successively attach to the ion as a function of time. We found that the binding dynamics of the first five helium atoms is well described by a Poissonian process with a binding rate of 2.0 atoms per picosecond. This rate is consistent with time-dependent density-functional-theory simulations of the solvation process. Furthermore, our measurements enable an estimate of the energy removed from the region around the sodium ion as a function of time, revealing that half of the total solvation energy is dissipated after four picoseconds. Our experimental method opens possibilities for benchmarking theoretical models of ion solvation and for time-resolved measurements of cation-molecule complex formation.
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Affiliation(s)
| | - Constant A Schouder
- Department of Chemistry, Aarhus University, Aarhus, Denmark
- Université Paris-Saclay, CEA, CNRS, LIDYL, Gif-sur-Yvette, France
| | | | | | | | - Martí Pi
- Departament FQA, Facultat de Física, Universitat de Barcelona, Barcelona, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, Barcelona, Spain
| | - Manuel Barranco
- Departament FQA, Facultat de Física, Universitat de Barcelona, Barcelona, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, Barcelona, Spain
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3
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Raspopović ZM. Space-resolved average kinetic energy of ion swarms in a uniform electric field. Phys Rev E 2023; 108:L053202. [PMID: 38115471 DOI: 10.1103/physreve.108.l053202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 09/29/2023] [Indexed: 12/21/2023]
Abstract
A pulse of noninteracting charged particles in an unbounded gas, exposed to a low, constant, homogeneous electric field, was studied in both space and time using a Monte Carlo simulation technique. The difference in electrical potential between the leading and trailing edges of the swarm results in the space-resolved average ion kinetic energy becoming a linearly increasing function of space. This Letter analyzes whether the average ion kinetic energy at the leading edge reaches a stationary value during the spatiotemporal evolution of the swarm, as has been considered so far. When the swarm's mean kinetic energy reaches a steady-state value, indicating that an energy balance is established over time, the gains (from the field) and losses (due to collisions) are nonuniform across space. The local power balance is negative at the front of the swarm and positive at the tail. Cooling the ions at the front and heating the ions at the tail results in a decrease in the average ion kinetic energy at the front and an increase at the tail. Thus, it can be concluded that stationary values of average ion kinetic energy do not exist at the leading and trailing edges during the evolution. Instead, they tend to approach the swarm's mean kinetic energy as t→∞.
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Affiliation(s)
- Z M Raspopović
- Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia
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4
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de Jesus GCC, Costa CVS, de Macedo LGM, de Oliveira Neto PH, Pirani F, Gargano R. Electronic and dynamical properties of non-covalent diatomic aggregates formed by He with neutral and ionic Li and Be. J Mol Model 2023; 29:190. [PMID: 37249738 DOI: 10.1007/s00894-023-05512-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 03/13/2023] [Indexed: 05/31/2023]
Abstract
CONTEXT AND RESULTS This work aims to study the influence of the absence and presence of permanent charges on the electronic and dynamical properties of the non-covalent bound diatomic systems involving He and Li, Be as neutral and ionic partners. The charge displacement results suggest that in the formation of HeLi[Formula: see text], HeBe[Formula: see text], and HeBe[Formula: see text], the neutral He atom undergoes, in the electric field of the ion, a pronounced electronic polarization, and the natural bond order theoretical approach indicates that in the formation of the molecular orbital He acts as a weak electron donor. The energy decomposition analysis provides the dispersion and induction components as the attractive leading terms controlling the stability of all systems, confirming that the formed bond substantially maintains a non-covalent nature which is also supported by the Quantum Theory of Atoms in Molecules (QTAIM) analysis. Finally, it was found that the HeLi and HeBe neutral systems are unstable under any condition, HeLi[Formula: see text] and HeBe[Formula: see text] ionic systems are stable below 317K and 138K, respectively, while the HeBe[Formula: see text] system becomes unstable only after 3045K. COMPUTATIONAL AND THEORETICAL TECHNIQUES The potential energy curves and interactions in all systems were studied theoretically based on coupled-cluster singles and doubles method with perturbative inclusion of triples CCSD(T) method with an aug-cc-pV5Z basis set. More precisely, it was determined the potential energy curves describing the stability of the HeLi, HeLi[Formula: see text], HeBe, HeBe[Formula: see text], and HeBe[Formula: see text] systems, the charge displacement within the formed adducts, the decomposition of their total interaction energy, the topological analysis of their bonds, their rovibrational energies, their spectroscopic constants and lifetimes.
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Affiliation(s)
| | - Caio Vinícius Sousa Costa
- Instituto de Física, Universidade de Brasília (UnB), P.O. Box 04455, Brasília, DF, 70919-970, Brazil
| | | | | | - Fernando Pirani
- Dipartimento di Chimica, Biologia e Biotecnologie, Università degli studi di Perugia, via Elce di Sotto 8, Perugia, Italy
- Dipartimento di Ingegneria Civile ed Ambientale, Università di Perugia, via Duranti 93, 06125, Perugia, Italy
| | - Ricardo Gargano
- Instituto de Física, Universidade de Brasília (UnB), P.O. Box 04455, Brasília, DF, 70919-970, Brazil
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5
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Zunzunegui-Bru E, Gruber E, Lázaro T, Bartolomei M, Hernández MI, Campos-Martínez J, González-Lezana T, Bergmeister S, Zappa F, Scheier P, Pérez de Tudela R, Hernández-Rojas J, Bretón J. Observation of Multiple Ordered Solvation Shells in Doped Helium Droplets: The Case of He NCa 2. J Phys Chem Lett 2023; 14:3126-3131. [PMID: 36952614 PMCID: PMC10084467 DOI: 10.1021/acs.jpclett.3c00224] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
In this Letter, we report the experimental detection of likely the largest ordered structure of helium atoms surrounding a monatomic impurity observed to date using a recently developed technique. The mass spectrometry investigation of HeNCa2+ clusters, formed in multiply charged helium nanodroplets, reveals magic numbers at N = 12, 32, 44, and 74. Classical optimization and path integral Monte Carlo calculations suggest the existence of up to four shells surrounding the calcium dication which are closed with well-ordered Mozartkugel-like structures: He12Ca2+ with an icosahedron, the second at He32Ca2+ with a dodecahedron, the third at He44Ca2+ with a larger icosahedron, and finally for He74Ca2+, we find that the outermost He atoms form an icosidodecahedron which contains the other inner shells. We analyze the reasons for the formation of such ordered shells in order to guide the selection of possible candidates to exhibit a similar behavior.
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Affiliation(s)
- Eva Zunzunegui-Bru
- Instituto de Física Fundamental, IFF-CSIC, Serrano 123, Madrid 28006, Spain
| | - Elisabeth Gruber
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, Innsbruck 6020, Austria
| | - Teresa Lázaro
- Instituto de Física Fundamental, IFF-CSIC, Serrano 123, Madrid 28006, Spain
| | | | - Marta I Hernández
- Instituto de Física Fundamental, IFF-CSIC, Serrano 123, Madrid 28006, Spain
| | | | | | - Stefan Bergmeister
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, Innsbruck 6020, Austria
| | - Fabio Zappa
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, Innsbruck 6020, Austria
| | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, Innsbruck 6020, Austria
| | | | - Javier Hernández-Rojas
- Departamento de Física and IUdEA, Universidad de La Laguna, La Laguna, 38205, Tenerife, Spain
| | - José Bretón
- Departamento de Física and IUdEA, Universidad de La Laguna, La Laguna, 38205, Tenerife, Spain
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6
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Azriel’ VM, Akimov VM, Ermolova EV, Kabanov DB, Kolesnikova LI, Rusin LY, Sevryuk MB. Dynamics of Direct Three-Body Recombination of Cesium and Fluoride Ions As Well As of Cesium and Iodide Ions in the Presence of a Krypton Atom. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2022. [DOI: 10.1134/s1990793122060148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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7
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Buchachenko AA, Visentin G, Viehland LA. Gaseous transport properties of the ground and excited Cr, Co and Ni cations in He: Ab initio study of electronic state chromatography. J Chem Phys 2022; 157:104303. [DOI: 10.1063/5.0107110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The electronic state chromatography (ESC) effect allows the differentiation of ions in their ground and metastable states by their gaseous mobilities in the limit of low electrostatic fields. It is investigated here by means of accurate transport calculations with ab initio ion-atom potentials for the Cr, Co and Ni cations in He buffer gas near room temperature. The values for the open-shell ions in degenerate states are shown to be well approximated by using the single isotropic interaction potential. Minimalistic implementation of the multireference configuration interaction (MRCI) method is enough to describe the zero-field transport properties of metastable ions in the 3dm-14s configuration, such as Cr+(a6D), Co+(a5F) and Ni+(4F), due to their weak and almost isotropic interaction with He atom and the low sensitivity of the measured mobilities to the potential well region. By contrast, interactions involving the ions in the ground 3dm states, such as Cr+(a6S), Co+(a3F) and Ni+(2D), are strong and anisotropic; the MRCI potentials poorly describe their transport coefficients. Even the coupled cluster with singles, doubles and non-iterative triples [CCSD(T)] approach taking into account vectorial spin-orbit coupling may not be accurate enough, as shown here for Ni+(2D). The sensitivity of ion mobility and the ESC effect to interaction potentials, similarities in ion-He interactions of the studied ions in distinct configurations, accuracy and possible improvements of the ab initio schemes, and control of the ESC effect by macroscopic parameters are discussed. Extensive sets of improved interaction potentials and transport data are generated.
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Affiliation(s)
| | | | - Larry A. Viehland
- Department of Chemistry, Chatham University, United States of America
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8
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Azriel’ VM, Akimov VM, Ermolova EV, Kabanov DB, Kolesnikova LI, Rusin LY, Sevryuk MB. A Hard Sphere Model for Bimolecular Recombination of Heavy Ions. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2021. [DOI: 10.1134/s1990793121060142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract
We propose a hard sphere model of bimolecular recombination RM+ + X– → MX + R, where M+ is an alkali ion, X– is a halide ion, and R is a neutral rare gas or mercury atom. Calculations are carried out for M+ = Cs+, X– = Br–, R = Ar, Kr, Xe, Hg, for collision energies in the range from 1 to 10 eV, and for distributions of the RM+ complex internal energy corresponding to temperatures of 500, 1000, and 2000 K. The excitation functions and opacity functions of bimolecular recombination in the hard sphere approximation are found, and the classification of the collisions according to the sequences of pairwise encounters of the particles is considered. In more than half of all the cases, recombination occurs due to a single impact of the Br– ion with the R atom. For the recombination XeCs+ + Br–, the hard sphere model enables one to reproduce the most important characteristics of the collision energy dependence of the recombination probability obtained within the framework of quasiclassical trajectory calculations.
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9
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Akimov VM, Azriel' VM, Ermolova EV, Kabanov DB, Kolesnikova LI, Rusin LY, Sevryuk MB. Dynamics of third order direct three-body recombination of heavy ions. Phys Chem Chem Phys 2021; 23:7783-7798. [PMID: 33047746 DOI: 10.1039/d0cp04183a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The direct three-body recombination reactions Cs+ + X- + R → CsX + R (X = F, I and R = Ar, Xe) are studied within the quasiclassical trajectory method using diabatic semiempirical potential energy surfaces, the encounters of the ions being non-central. The collision energies range between 1 and 10 eV (values typical for low temperature plasma), while the so-called delay parameter, which characterizes the delay in the arrival of the neutral atom R in relation to the time instant when the distance between the ions attains its minimum, is equal to 0 or 20%. The calculation results include the recombination excitation functions, the opacity functions, and the vibrational and rotational energy distributions of the recombination products. All the four reactions considered exhibit similar overall statistical dynamics, but each process has its own features. On the whole, for both the recombining pairs Cs+ + F- and Cs+ + I-, xenon is more effective than argon as an acceptor of excess energy from the ion pair. The rotational energy distributions of the salt molecules CsF and CsI are almost equilibrium, whereas the vibrational energy distributions are strongly non-equilibrium.
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Affiliation(s)
- Vyacheslav M Akimov
- V. L. Tal'rose Institute for Energy Problems of Chemical Physics, N. N. Semënov Federal Research Center of Chemical Physics, Russian Academy of Sciences, Leninskii Prospect 38, Bld. 2, Moscow 119334, Russia.
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10
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Chrysos M, Rachet F. Heavy rare-gas atomic pairs and the "double penalty" issue: Isotropic Raman lineshapes by Kr2, Xe2, and KrXe at room temperature. J Chem Phys 2016; 143:174301. [PMID: 26547164 DOI: 10.1063/1.4934784] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report absolutely calibrated isotropic Raman lineshapes for Kr2 and Xe2 and for KrXe at 294.5 K and compare them to quantum-mechanically generated lineshapes by using state-of-the-art second-order Møller-Plesset and DFT/B3LYP data sets for the induced mean dipole polarizability ᾱ. A very good agreement between the numerical and the experimental data was observed but the large uncertainty margins and the short Raman frequency interval probed in our experiment prevented us from rating on a more refined scale the performance of the tested ᾱ models. These drawbacks are inherent in isotropic Raman spectrum measurements and amplified for dissimilar pairs because, for such systems and spectra, the unreliable operation of subtracting optical signals of comparable magnitude occurs twice per Raman frequency shift value, thus penalizing twice the quality of the measured data. In light of our findings and of previously reported evidence about related electric properties in Kr2 and Xe2 and in KrXe, we are left with no doubt as to the consistency of the induced-polarizability and interatomic-potential data used for these three systems at the reported level of accuracy.
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Affiliation(s)
- M Chrysos
- LUNAM Université, Université d'Angers, CNRS UMR 6200, Laboratoire MOLTECH-Anjou, 2 Bd Lavoisier, 49045 Angers, France
| | - F Rachet
- LUNAM Université, Université d'Angers, CNRS UMR 6200, Laboratoire MOLTECH-Anjou, 2 Bd Lavoisier, 49045 Angers, France
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11
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von Vangerow J, John O, Stienkemeier F, Mudrich M. Dynamics of solvation and desolvation of rubidium attached to He nanodroplets. J Chem Phys 2015. [DOI: 10.1063/1.4926829] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J. von Vangerow
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - O. John
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - F. Stienkemeier
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - M. Mudrich
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
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12
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Xantheas SS, Werhahn JC. Universal scaling of potential energy functions describing intermolecular interactions. I. Foundations and scalable forms of new generalized Mie, Lennard-Jones, Morse, and Buckingham exponential-6 potentials. J Chem Phys 2014; 141:064117. [DOI: 10.1063/1.4891819] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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von Vangerow J, Sieg A, Stienkemeier F, Mudrich M, Leal A, Mateo D, Hernando A, Barranco M, Pi M. Desorption Dynamics of Heavy Alkali Metal Atoms (Rb, Cs) Off the Surface of Helium Nanodroplets. J Phys Chem A 2014; 118:6604-14. [DOI: 10.1021/jp503308w] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. von Vangerow
- Physikalisches
Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - A. Sieg
- Physikalisches
Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - F. Stienkemeier
- Physikalisches
Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - M. Mudrich
- Physikalisches
Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - A. Leal
- Departament
ECM, Facultat de Física and IN2UB, Universitat de Barcelona, 08028 Barcelona, Spain
| | - D. Mateo
- Departament
ECM, Facultat de Física and IN2UB, Universitat de Barcelona, 08028 Barcelona, Spain
- Department
of Chemistry and Biochemistry, California State University at Northridge, 18111 Nordhoff Street, Northridge, California 91330, United States
| | - A. Hernando
- Laboratoire
de Chimie Physique Moléculaire, Swiss Federal Institute of Technology Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - M. Barranco
- Departament
ECM, Facultat de Física and IN2UB, Universitat de Barcelona, 08028 Barcelona, Spain
| | - M. Pi
- Departament
ECM, Facultat de Física and IN2UB, Universitat de Barcelona, 08028 Barcelona, Spain
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14
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Particles dispersed in a dilute gas. II. From the Langevin equation to a more general kinetic approach. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2013.10.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Sládek V, Lukeš V, Ilčin M, Biskupič S. Ab initio calculation of structure and transport properties of He…X (X = Zn, Cd, Hg) van der Waals complexes. J Comput Chem 2012; 33:767-78. [DOI: 10.1002/jcc.22904] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Revised: 11/16/2011] [Accepted: 11/17/2011] [Indexed: 12/19/2022]
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16
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Withers CD, Wright TG, Viehland LA, Grossman L, Kirkpatrick CC, Lee EPF. Theoretical study of Cl−RG (rare gas) complexes and transport of Cl− through RG (RG = He–Rn). J Chem Phys 2011; 135:024312. [DOI: 10.1063/1.3598472] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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Galli DE, Ceperley DM, Reatto L. Path integral Monte Carlo study of 4He clusters doped with alkali and alkali-earth ions. J Phys Chem A 2011; 115:7300-9. [PMID: 21568337 DOI: 10.1021/jp200617a] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Path integral Monte Carlo calculations of (4)He nanodroplets doped with alkali (Na(+), K(+) and Cs(+)) and alkali-earth (Be(+) and Mg(+)) ions are presented. We study the system at T = 1 K and between 14 and 128 (4)He atoms. For all studied systems, we find that the ion is well localized at the center of the droplet with the formation of a "snowball" of well-defined shells of localized (4)He atoms forming solid-like order in at least the first surrounding shell. The number of surrounding helium shells (two or three) and the number of atoms per shell and the degree of localization of the helium atoms are sensitive to the type of ion. The number of (4)He atoms in the first shell varies from 12 for Na(+) to 18 for Mg(+) and depends weakly on the size of the droplet. The study of the density profile and of the angular correlations shows that the local solid-like order is more pronounced for the alkali ions with Na(+) giving a very stable icosahedral order extending up to three shells.
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Affiliation(s)
- D E Galli
- Dipartimento di Fisica, Università degli Studi di Milano, via Celoria 16, 20133 Milano, Italy.
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18
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Pakhira S, Bera NC, Das AK. Coupled cluster study of structural properties of RgI and RgI− (Rg = He, Ne, Ar) weakly bound molecules. Struct Chem 2011. [DOI: 10.1007/s11224-011-9763-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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SOLDÁN PAVEL, LEE EDMONDPF, WRIGHT TIMOTHYG. Interatomic potentials for the Na+—Rg complexes (Rg = He, Ne and Ar). Mol Phys 2009. [DOI: 10.1080/00268979909482816] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- PAVEL SOLDÁN
- a Department of Chemistry , University of Southampton , Highfield , Southampton , SO17 1BJ , UK
- b J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, 182 23 Prague 8 , Dolejˇkova , 3 , Czech Republic
| | - EDMOND P. F. LEE
- a Department of Chemistry , University of Southampton , Highfield , Southampton , SO17 1BJ , UK
- c Department of Applied Biology and Chemical Technology , Hong Kong Polytechnic University , Hung Hom , Hong Kong
| | - TIMOTHY G. WRIGHT
- a Department of Chemistry , University of Southampton , Highfield , Southampton , SO17 1BJ , UK
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20
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Dixneuf S, Chrysos M, Rachet F. Anisotropic collision-induced Raman scattering by the Kr:Xe gas mixture. J Chem Phys 2009; 131:074304. [DOI: 10.1063/1.3200929] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Buchachenko AA, Wright TG, Lee EPF, Viehland LA. Interaction Potentials, Spectroscopy, and Transport Properties of the Br+−RG Systems (RG = He−Ar). J Phys Chem A 2009; 113:14431-8. [DOI: 10.1021/jp903811b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexei A. Buchachenko
- Laboratory of Molecular Structure and Quantum Mechanics, Department of Chemistry, Moscow State Universty, Moscow 119991, Russia, School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom, School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom, and Department of Science, Chatham University, Pittsburgh, Pennsylvania 15232
| | - Timothy G. Wright
- Laboratory of Molecular Structure and Quantum Mechanics, Department of Chemistry, Moscow State Universty, Moscow 119991, Russia, School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom, School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom, and Department of Science, Chatham University, Pittsburgh, Pennsylvania 15232
| | - Edmond P. F. Lee
- Laboratory of Molecular Structure and Quantum Mechanics, Department of Chemistry, Moscow State Universty, Moscow 119991, Russia, School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom, School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom, and Department of Science, Chatham University, Pittsburgh, Pennsylvania 15232
| | - Larry A. Viehland
- Laboratory of Molecular Structure and Quantum Mechanics, Department of Chemistry, Moscow State Universty, Moscow 119991, Russia, School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom, School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom, and Department of Science, Chatham University, Pittsburgh, Pennsylvania 15232
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22
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Garand E, Buchachenko AA, Yacovitch TI, Szczȩśniak MM, Neumark DM. Study of KrO− and KrO via Slow Photoelectron Velocity-Map Imaging Spectroscopy and ab Initio Calculations. J Phys Chem A 2009; 113:14439-46. [DOI: 10.1021/jp903819m] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Etienne Garand
- Department of Chemistry, University of California—Berkeley, Berkeley, California 94720, Laboratory of Molecular Structure and Quantum Mechanics, Department of Chemistry, Moscow State University, Moscow 119991, Russia, Department of Chemistry, Oakland University, Rochester, Michigan 48309, Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warszawa, Poland, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Alexei A. Buchachenko
- Department of Chemistry, University of California—Berkeley, Berkeley, California 94720, Laboratory of Molecular Structure and Quantum Mechanics, Department of Chemistry, Moscow State University, Moscow 119991, Russia, Department of Chemistry, Oakland University, Rochester, Michigan 48309, Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warszawa, Poland, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Tara I. Yacovitch
- Department of Chemistry, University of California—Berkeley, Berkeley, California 94720, Laboratory of Molecular Structure and Quantum Mechanics, Department of Chemistry, Moscow State University, Moscow 119991, Russia, Department of Chemistry, Oakland University, Rochester, Michigan 48309, Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warszawa, Poland, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Małgorzata M. Szczȩśniak
- Department of Chemistry, University of California—Berkeley, Berkeley, California 94720, Laboratory of Molecular Structure and Quantum Mechanics, Department of Chemistry, Moscow State University, Moscow 119991, Russia, Department of Chemistry, Oakland University, Rochester, Michigan 48309, Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warszawa, Poland, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
| | - Daniel M. Neumark
- Department of Chemistry, University of California—Berkeley, Berkeley, California 94720, Laboratory of Molecular Structure and Quantum Mechanics, Department of Chemistry, Moscow State University, Moscow 119991, Russia, Department of Chemistry, Oakland University, Rochester, Michigan 48309, Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warszawa, Poland, and Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720
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23
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Coccia E, Bodo E, Marinetti F, Gianturco FA, Yildrim E, Yurtsever M, Yurtsever E. Bosonic helium droplets with cationic impurities: onset of electrostriction and snowball effects from quantum calculations. J Chem Phys 2007; 126:124319. [PMID: 17411135 DOI: 10.1063/1.2712437] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Variational Monte Carlo and diffusion Monte Carlo calculations have been carried out for cations such as Li(+), Na(+), and K(+) as dopants of small helium clusters over a range of cluster sizes up to about 12 solvent atoms. The interaction has been modeled through a sum-of-potential picture that disregards higher order effects beyond atom-atom and atom-ion contributions. The latter were obtained from highly correlated ab initio calculations over a broad range of interatomic distances. This study focuses on two of the most striking features of the microsolvation in a quantum solvent of a cationic dopant: electrostriction and snowball effects. They are discussed here in detail and in relation with the nanoscopic properties of the interaction forces at play within a fully quantum picture of the cluster features.
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Affiliation(s)
- E Coccia
- Department of Chemistry, University of Rome La Sapienza and CNISM, Rome, Italy
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24
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Bera NC, Das AK. Ab initiostudy of spectroscopic properties of RgCl (Rg=He, Ne, Ar, Kr) and their anions. Mol Phys 2007. [DOI: 10.1080/00268970701390164] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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25
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26
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Hogan MJ. Testing ion-neutral interaction potentials using calculated ion transport coefficients. J Chem Phys 2006; 125:164325. [PMID: 17092091 DOI: 10.1063/1.2363197] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Several commonly measured ion transport coefficients were investigated in order to determine their sensitivity for testing and comparing proposed ion-neutral interaction potentials. A variety of positive ions, negative ions, neutrals, and temperatures were included in order to draw as general a conclusion as possible. All transport coefficients considered were found to be sufficiently sensitive to be used to clearly distinguish between less and more accurate interaction potentials. It was also found that the longitudinal diffusion coefficient is the most sensitive test, followed by both the transverse diffusion coefficient and the ratio of the longitudinal diffusion coefficient to mobility, followed by the ratio of the transverse diffusion coefficient to mobility and that the mobility is the least sensitive test. When presently achievable levels of experimental error were also taken into account, however, there was no significant difference in the sensitivities.
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Affiliation(s)
- M J Hogan
- Mathematics and Science Department, United States Merchant Marine Academy, Kings Point, New York 11024, USA.
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27
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Buchachenko AA, Kłos J, Szcześniak MM, Chałasiński G, Gray BR, Wright TG, Wood EL, Viehland LA, Qing E. Interaction potentials for Br−–Rg (Rg=He–Rn): Spectroscopy and transport coefficients. J Chem Phys 2006; 125:64305. [PMID: 16942284 DOI: 10.1063/1.2244571] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
High-level ab initio CCSD(T) calculations are performed in order to obtain accurate interaction potentials for the Br(-) anion interacting with each rare gas (Rg) atom. For the Rg atoms from He to Ar, two approaches are taken. The first one implements a relativistic core potential and an aug-cc-pVQZ basis set for bromine, an aug-cc-pV5Z basis set for Rg, and a set of bond functions placed at the midpoint of the Rg-Br distance. The second one uses the all-electron approximation with aug-cc-pV5Z bases further augmented by an extra diffuse function in each shell. Comparison reveals close similarity between both sets of results, so for Rg atoms from Kr to Rn only the second approach is exploited. Calculated potentials are assessed against the previous empirical, semiempirical, and ab initio potentials, and against available beam scattering data, zero electron kinetic energy spectroscopic data, and various sets of the measured ion mobilities and diffusion coefficients. This multiproperty analysis leads to the conclusion that the present potentials are consistently good for the whole series of Br(-)-Rg pairs over the whole range of internuclear distances covered.
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28
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Gray BR, Wright TG, Wood EL, Viehland LA. Accurate potential energy curves for F−–Rg (Rg = He–Rn): Spectroscopy and transport coefficients. Phys Chem Chem Phys 2006; 8:4752-7. [PMID: 17043718 DOI: 10.1039/b610476b] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
High-quality ab initio potential energy curves are presented for the F(-)-Rg series (Rg = He-Rn). Calculations are performed at the CCSD(T) level of theory, employing d-aug-cc-pV5Z quality basis sets, with "small core" relativistic effective core potentials being used for Kr-Rn. The quality of the curves is judged by agreement with recent high-level calculations in the case of F(-)-He and F(-)-Ne and by excellent agreement with mobility data for the systems F(-)-Rg (Rg = He-Xe). Except for these recent high-level calculations on the two lightest systems, we are able to deduce that all other previous potentials for the whole set of these systems are inadequate. We also present spectroscopic information for the titular species, derived from our potential energy curves.
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Affiliation(s)
- Benjamin R Gray
- School of Chemistry, University of Nottingham, University Park, UK NG7 2RD
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29
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Pirani F, Maciel GS, Cappelletti D, Aquilanti V. Experimental benchmarks and phenomenology of interatomic forces: open-shell and electronic anisotropy effects. INT REV PHYS CHEM 2006. [DOI: 10.1080/01442350600674033] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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Buchachenko AA, Tscherbul TV, Kłos J, Szcześniak MM, Chałasiński G, Webb R, Viehland LA. Interaction potentials of the RG–I anions, neutrals, and cations (RG=He, Ne, Ar). J Chem Phys 2005; 122:194311. [PMID: 16161577 DOI: 10.1063/1.1900085] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Interaction potentials of the iodine atom, atomic cation, and anion with light rare-gas atoms from He to Ar are calculated within the unified ab initio approach using the unrestricted coupled-cluster with singles and doubles and perturbative treatment of triples correlation treatment, relativistic small-core pseudopotential, and an extended basis set. Ab initio points are fit to a flexible analytical function. The calculated potentials are compared with available literature data, assessed in the I(-)-and I+-ion mobility calculations and the Ar-I(-)-anion zero electron kinetic-energy spectra simulations, and analyzed using the correlation rules. The results indicate a high precision of the reported potentials.
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Affiliation(s)
- A A Buchachenko
- Laboratory of Molecular Structure and Quantum Mechanics, Department of Chemistry, Moscow State University, Moscow 119992, Russia.
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31
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Viehland LA, Lozeille J, Soldan P, Lee EPF, Wright TG. Spectroscopy of K[sup +]⋅Rg and transport coefficients of K[sup +] in Rg (Rg=He–Rn). J Chem Phys 2004; 121:341-51. [PMID: 15260553 DOI: 10.1063/1.1735560] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Ab initio calculations employing the coupled-cluster method, with single and double substitutions and accounting for triple excitations noniteratively [CCSD(T)], are used to obtain accurate potential energy curves for the K(+)He, K(+)Ne, K(+)Ar, K(+)Kr, K(+)Xe, and K(+)Rn cationic complexes. From these potentials, rovibrational energy levels and spectroscopic parameters are calculated. In addition, mobilities and diffusion coefficients for K(+) cations moving through the six rare gases are calculated, under conditions that match previous experimental determinations. A detailed statistical comparison of the present and previous potentials is made with available experimental data, and critical conclusions are drawn as to the reliability of each set of data. It is concluded that the present ab initio potentials match the accuracy of the best model potentials and the most reliable experimental data.
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Affiliation(s)
- Larry A Viehland
- Division of Science, Chatham College, Pittsburgh, Pennsylvania 15232, USA.
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32
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Hickling HL, Viehland LA, . Shepherd DT, Soldán P, Lee EPF, Wright TG. Spectroscopy of M+·Rg and transport coefficients of M+in Rg (M = Rb–Fr; Rg = He–Rn). Phys Chem Chem Phys 2004. [DOI: 10.1039/b405221h] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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33
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Balla G, Koutselos AD. Molecular dynamics simulation of ion transport in moderately dense gases in an electrostatic field. J Chem Phys 2003. [DOI: 10.1063/1.1622377] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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34
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Viehland LA, Lozeille J, Soldán P, Lee EPF, Wright TG. Spectroscopy of Na+⋅Rg and transport coefficients of Na+ in Rg(Rg=He–Rn). J Chem Phys 2003. [DOI: 10.1063/1.1591171] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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35
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Bellert D, Breckenridge WH. Bonding in ground-state and excited-state A+.Rg van der Waals ions (A = atom, Rg = rare-gas atom): a model-potential analysis. Chem Rev 2002; 102:1595-622. [PMID: 11996545 DOI: 10.1021/cr980090e] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- D Bellert
- Department of Chemistry, University of Utah, 315 South 1400 East, Room 2020, Salt Lake City, UT 84112, USA
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36
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Lenzer T, Yourshaw I, Furlanetto MR, Pivonka NL, Neumark DM. Zero electron kinetic energy spectroscopy of the XeCl− anion. J Chem Phys 2002. [DOI: 10.1063/1.1450551] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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37
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Soldán P, Lee EP, Lozeille J, Murrell JN, Wright TG. High-quality interatomic potential for Li+·He. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00717-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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38
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39
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Buchachenko AA, Krems RV, Szczȩśniak MM, Xiao YD, Viehland LA, Chałasiński G. Collision and transport properties of Rg+Cl(2P) and Rg+Cl−(1S) (Rg=Ar, Kr) fromab initiopotentials. J Chem Phys 2001. [DOI: 10.1063/1.1370530] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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40
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Burns KL, Bellert D, Leung AWK, Breckenridge WH. M+/Rg bonding: The effects of M+ permanent quadrupole moments (M+= atomic metal ion; Rg=rare gas atom). J Chem Phys 2001. [DOI: 10.1063/1.1361250] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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41
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Burns KL, Bellert D, Leung AWK, Breckenridge WH. The effects of dispersive Cn/Rn-attraction on M+/Rg bonding (M+=atomic metal ion, Rg=rare gas atom). J Chem Phys 2001. [DOI: 10.1063/1.1328748] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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42
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Barnett DA, Ells B, Guevremont R, Purves RW, Viehland LA. Evaluation of carrier gases for use in high-field asymmetric waveform ion mobility spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2000; 11:1125-1133. [PMID: 11118120 DOI: 10.1016/s1044-0305(00)00187-2] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Effects of carrier gas type (N2, O2, CO2, N2O, and SF6) on changes in the ratio of high- to low-field ion mobility, Kh/K, of cesium, gramicidin S, tetrahexylammonium, heptadecanoic acid, and aspartic acid in fields of up to 67 Td are presented. The theory of the mobility of ions at high E/N in different gases is discussed. Plots of Kh/K as a function of the ionic energy parameter, E/N, for the five ions in each of the gases were derived from experimental data collected using a high-field asymmetric waveform ion mobility spectrometer. The change in the ratio of high- to low-field ion mobility of cesium in carrier gases of O2 and N2 showed excellent agreement with literature values. The behavior of cesium in O2 and N2 is used to illustrate that the ratio Kh/K as a function of effective temperature is invariant with gas type as long as the well depth of the interaction potential significantly exceeds thermal energy. From these results, it appears that the well depth of the interaction potential of the heavier ions studied here, including gramicidin S, tetrahexylammonium, and heptadecanoic acid, with bath gases such as N2 and O2, is shallow relative to thermal energy.
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Affiliation(s)
- D A Barnett
- Institute for National Measurement Standards, National Research Council of Canada, Ottawa, ON
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43
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44
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Zhu JM, Zhou BL, Yan ZC. Dispersion coefficients for interactions among two-electron atomic systems. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(99)01021-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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45
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Lenzer T, Yourshaw I, Furlanetto MR, Reiser G, Neumark DM. Zero electron kinetic energy spectroscopy of the ArCl− anion. J Chem Phys 1999. [DOI: 10.1063/1.478923] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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46
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Lenzer T, Furlanetto MR, Asmis KR, Neumark DM. Zero electron kinetic energy and photoelectron spectroscopy of the XeI− anion. J Chem Phys 1998. [DOI: 10.1063/1.477774] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
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47
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PELLENQ RJM, NICHOLSON D. A simple method for calculating dispersion coefficients for isolated and condensed-phase species. Mol Phys 1998. [DOI: 10.1080/00268979809483189] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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48
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Yourshaw I, Lenzer T, Reiser G, Neumark DM. Zero electron kinetic energy spectroscopy of the KrBr−, XeBr−, and KrCl− anions. J Chem Phys 1998. [DOI: 10.1063/1.477141] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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49
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50
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Velardez GF, Bollati RA, Ferrero JC. Quasiclassical trajectory simulations of collisional vibrationally excited HgBr(B 2Σ). II. Dependence on rotational excitation. J Chem Phys 1998. [DOI: 10.1063/1.475969] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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