A study of the gas phase reactions of various cations with two derivatives of SF6; SF5CF3 and SF5Cl

文献情報

出版日 2002-05-02

DOI 10.1039/B109567F

インパクトファクター 3.676

著者

Clair Atterbury, Andrew D. J. Critchley, Richard A. Kennedy, Chris A. Mayhew, Richard P. Tuckett

原文を見る

要旨

A selected ion flow tube apparatus was used to investigate the positive ion chemistry of two derivatives of SF6; SF5CF3 and SF5Cl. This represents the first investigation of the positive ion chemistry of SF5Cl, and much of the data on SF5CF3 is being presented here for the first time. Rate coefficients and ion product branching ratios have been determined at room temperature (300 K) for reactions with the following twenty-two cations; Ne+, F+, Ar+, N2+, N+, CO+, CO2+, O+, N2O+, H2O+, O2+, SF4+, CF2+, SF+, SF2+, NO2+, SF5+, NO+, CF+, CF3+, SF3+, and H3O+ (listed in order of decreasing recombination energy). Comparisons are made in the text for the reactions of these ions with SF6. SF2+, NO2+, NO+, SF3+, and H3O+ are found to be unreactive with both of the derivatives. The majority of the other reactions proceed with rate coefficients which are close to the capture value. The exceptions are the reactions of O2+, SF+, SF5+, and CF3+ with SF5CF3, and SF4+ and SF5+ with SF5Cl, all of which have rate coefficients significantly less than the capture mechanism value. Several distinct processes are observed among the large number of reactions studied, including dissociative charge transfer and various abstraction channels. Non-dissociative charge transfer is not observed, implying that any parent ions formed dissociate rapidly to the fragment ions and associated neutrals.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.