International Journal of Molecular Sciences

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Charge Transfer in Ionic and Molecular Systems

by Marie-Christine Bacchus-Montabonel

Int. J. Mol. Sci. 2002, 3(3), 114; https://doi.org/10.3390/i3030114 - 28 Mar 2002

Cited by 1 | Viewed by 5788

Abstract

Charge transfer reactions are fundamental processes present in almost all areas of physics, chemistry and biochemistry.[...] Full article

(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)

Research

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251 KiB

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Charge Exchange in Low-Energy H, D + C⁴⁺ Collisions with Full Account of Electron Translation

by A. K. Belyaev, J. Grosser, J. Liévin and N. Vaeck

Int. J. Mol. Sci. 2002, 3(3), 190-208; https://doi.org/10.3390/i3030190 - 30 Mar 2002

Cited by 3 | Viewed by 8182

Abstract

We report the application of the quantum approach, which takes full account of electron translation at low collisional energies, to the charge exchange process H, D + C⁴⁺ → H⁺, D⁺ + C³⁺(3s; 3p; [...] Read more.

We report the application of the quantum approach, which takes full account of electron translation at low collisional energies, to the charge exchange process H, D + C⁴⁺ → H⁺, D⁺ + C³⁺(3s; 3p; 3d). The partial and the total integral cross sections of the process are calculated in the energy range from 1 till 60 eV/amu. It is shown that the present results are independent from the upper integration limit for numerical solution of the coupled channel equations although nonadiabatic couplings remain nonzero up to infinity. The calculated partial and total cross sections are in agreement with the previous low-energy calculations and the available experimental data. It is shown that for low collisional energies the isotopic effect takes place. The observed effect is explained in terms of the nonadiabatic dynamics. Full article

(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)

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209 KiB

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Single Electron Capture in Slow Collisions of Doubly Charged Ions with Dinuclear Molecules

by Mihaela Albu, Libor Mrazek, Friedrich Aumayr and Hannspeter Winter

Int. J. Mol. Sci. 2002, 3(3), 209-219; https://doi.org/10.3390/i3030209 - 28 Mar 2002

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Abstract

We have performed translational-spectroscopical measurements on single electron capture (SEC) by impact of slow (impact energy ≤ 1 keV) doubly charged ions on dinuclear molecules. For impact of C²⁺ and N²⁺ ions the influence of their metastable fractions on the SEC [...] Read more.

We have performed translational-spectroscopical measurements on single electron capture (SEC) by impact of slow (impact energy ≤ 1 keV) doubly charged ions on dinuclear molecules. For impact of C²⁺ and N²⁺ ions the influence of their metastable fractions on the SEC probability has been studied. For impact of ⁴He²⁺ on O₂ and CO direct and dissociative SEC have been investigated. For all collision systems studied the principal SEC channels can be explained by the "reaction window" which results from multichannel-Landau-Zener treatments for the collisional quasimolecules. Full article

(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)

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208 KiB

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Rate Coefficient Determination in Charge Transfer Reactions

by Marie-Christine Bacchus-Montabonel, Ezinvi Baloïtcha, Michèle Desouter-Lecomte and Nathalie Vaeck

Int. J. Mol. Sci. 2002, 3(3), 176-189; https://doi.org/10.3390/i3030176 - 28 Mar 2002

Cited by 1 | Viewed by 8001

Abstract

The development of experimental ion-trap techniques provides the opportunity to compare directly theoretical rate coefficients to experimental data in the low-temperature regime. In the present work, we consider the ion-atom collisional systems, N²⁺, O²⁺, Si³⁺ and Si⁴⁺ [...] Read more.

The development of experimental ion-trap techniques provides the opportunity to compare directly theoretical rate coefficients to experimental data in the low-temperature regime. In the present work, we consider the ion-atom collisional systems, N²⁺, O²⁺, Si³⁺ and Si⁴⁺ on a He target, in order to examine the present status of the agreement between theory and experiment. Full article

(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)

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299 KiB

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Studies of Electron Capture by Multiply Charged Ions from Molecules using Translational Energy Spectroscopy

by D. M. Kearns, R. W. McCullough and H. B. Gilbody

Int. J. Mol. Sci. 2002, 3(3), 162-175; https://doi.org/10.3390/i3030162 - 28 Mar 2002

Cited by 5 | Viewed by 7974

Abstract

The development of experimental ion-trap techniques provides the opportunity to compare directly theoretical rate coefficients to experimental data in the low-temperature regime. In the present work, we consider the ion-atom collisional systems, N²⁺, O²⁺, Si³⁺ and Si⁴⁺ [...] Read more.

The development of experimental ion-trap techniques provides the opportunity to compare directly theoretical rate coefficients to experimental data in the low-temperature regime. In the present work, we consider the ion-atom collisional systems, N²⁺, O²⁺, Si³⁺ and Si⁴⁺ on a He target, in order to examine the present status of the agreement between theory and experiment. Full article

(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)

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263 KiB

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Anisotropy effects in H⁺+H₂ collisions

by L. F. Errea, A. Macías, L. Méndez, I. Rabadán and A. Riera

Int. J. Mol. Sci. 2002, 3(3), 142-161; https://doi.org/10.3390/i3030142 - 28 Mar 2002

Cited by 13 | Viewed by 10280

Abstract

The effect of the anisotropy of the interaction potential on ion-diatom non-adiabatic collisions is analized by considering the influence of the anisotropy on orientation averaged total cross sections for charge transfer in H⁺+H₂(X¹Σ⁺_g ) collisions. [...] Read more.

The effect of the anisotropy of the interaction potential on ion-diatom non-adiabatic collisions is analized by considering the influence of the anisotropy on orientation averaged total cross sections for charge transfer in H⁺+H₂(X¹Σ⁺_g ) collisions. We discuss the possibility of employing simpli ed methods such as an isotropic approximation, where only the electronic energies and interactions of a single orientation are necessary. The use of several isotropic calculations to evaluate the orientation averaged cross section is analized. Full article

(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)

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199 KiB

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Alignment-Dependent Atomic Model for Electron Transfer in Ion-Molecule Collisions

by C. D. Lin and Ingrid Reiser

Int. J. Mol. Sci. 2002, 3(3), 132-141; https://doi.org/10.3390/i3030132 - 28 Mar 2002

Cited by 2 | Viewed by 6980

Abstract

The alignment-dependent atomic model for treating electron transfer processes in ion-molecule collisions [Shingal and Lin, Phys. Rev. 1989, A40, 1302] is reviewed. This model has been applied to collisions between H⁺ and He²⁺ with H₂, and recently also to [...] Read more.

The alignment-dependent atomic model for treating electron transfer processes in ion-molecule collisions [Shingal and Lin, Phys. Rev. 1989, A40, 1302] is reviewed. This model has been applied to collisions between H⁺ and He²⁺ with H₂, and recently also to collisions between He²⁺ and Ar²⁺ ions with H₂⁺, where alignment effect is being explored experimentally. Full article

(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)

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209 KiB

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Electron Capture in Collisions of Slow Highly Charged Ions with an Atom and a Molecule: Processes and Fragmentation Dynamics

by François Frémont, Guillaume Laurent, Jimmy Rangama, Przemyslaw Sobocinski, Medhi Tarisien, Lamri Adoui, Amine Cassimi, Jean-Yves Chesnel, Xavier Fléchard, Dominique Hennecart and Xavier Husson

Int. J. Mol. Sci. 2002, 3(3), 115-131; https://doi.org/10.3390/i3030115 - 28 Mar 2002

Cited by 6 | Viewed by 9057

Abstract

Processes involved in slow collisions between highly charged ions (HCI) and neutral targets are presented. First, the mechanisms responsible for double electron capture are discussed. We show that, while the electron-nucleus interaction is expected to be dominant at projectile velocities of about 0.5 [...] Read more.

Processes involved in slow collisions between highly charged ions (HCI) and neutral targets are presented. First, the mechanisms responsible for double electron capture are discussed. We show that, while the electron-nucleus interaction is expected to be dominant at projectile velocities of about 0.5 a.u., the electron-electron interaction plays a decisive role during the collision and gains importance when the projectile velocity decreases. This interaction has also to be invoked in the capture of core electrons by HCI. Finally, the molecular fragmentation of H₂ following the impact of HCI is studied. Full article

(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)

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Other

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12 KiB

Open AccessNew Book Received

Highlights in Solute-Solvent Interactions

by W. Linert

Int. J. Mol. Sci. 2002, 3(3), 230-231; https://doi.org/10.3390/i3030230 - 28 Mar 2002

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Abstract

This book [2] emphasizes a broad spectrum of features in solution chemistry, reaching from recent developments in the empirical characterization of solvent-solute interactions up to modern theoretical descriptions of liquid-state systems, from solid-liquid interfaces to preferential solvation in mixed solvents.[...] Full article

(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)

12 KiB

Open AccessNew Book Received

The Law of Mass Action

by Shu-Kun Lin

Int. J. Mol. Sci. 2002, 3(3), 232-233; https://doi.org/10.3390/i3030232 - 27 Mar 2002

Viewed by 4794

Abstract

During the weekend I quickly browsed through this book [2] with great interest and recommend all chemists, whether experimental chemists or theoretical chemists, to read it.[...] Full article

(This article belongs to the Special Issue Charge Transfer in Ionic and Molecular Systems)

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