A kinetic study of the reactions FeO+ + O, Fe+·N2 + O, Fe+·O2 + O and FeO+ + CO: implications for sporadic E layers in the upper atmosphere

文献情報

出版日 2006-03-06

DOI 10.1039/B518155K

インパクトファクター 3.676

著者

K. R. S. Woodcock, T. Vondrak, S. R. Meech, J. M. C. Plane

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要旨

These gas-phase reactions were studied by pulsed laser ablation of an iron target to produce Fe+ in a fast flow tube, with detection of the ions by quadrupole mass spectrometry. Fe+·N2 and Fe+·O2 were produced by injecting N2 and O2, respectively, into the flow tube. FeO+ was produced from Fe+ by addition of N2O, or by ligand-switching from Fe+·N2 following the addition of atomic O. The following rate coefficients were measured: k(FeO+ + O → Fe+ + O2, 186–294 K) = (3.2 ± 1.5) × 10−11; k(Fe+·N2 + O → FeO++ N2, 294 K) = (4.6 ± 2.5) × 10−10; k(Fe+·O2 + O → FeO+ + O2, 294 K) = (6.3 ± 2.7) × 10−11; and k(FeO+ + CO → Fe+ + CO2, 294 K) = (1.59 ± 0.34) × 10−10 cm3 molecule−1 s−1, where the quoted uncertainties are a combination of the 1σ standard errors in the kinetic data and the systematic experimental errors. The surprisingly slow reaction between FeO+ and O is examined using ab initio quantum calculations of the relevant potential energy surfaces. The importance of this reaction for controlling the lifetime of sporadic E layers is then demonstrated using a model of the upper mesosphere and lower thermosphere.

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.

A kinetic study of the reactions FeO+ + O, Fe+·N2 + O, Fe+·O2 + O and FeO+ + CO: implications for sporadic E layers in the upper atmosphere

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