Reactions of Cl atoms with CH3I, C2H5I, 1-C3H7I, 2-C3H7I and CF3I: kinetics and atmospheric relevance

文献情報

出版日 2001-01-09

DOI 10.1039/B007608M

インパクトファクター 3.676

著者

E. S. N. Cotter, N. J. Booth, C. E. Canosa-Mas, D. J. Gray, D. E. Shallcross, R. P. Wayne

原文を見る

要旨

The kinetics of the reactions were studied at T = 298 K using a fast-flow discharge system with resonance-fluorescence detection of Cl atoms. The rate coefficients were found to be pressure-independent over the range 1.5–12 Torr, and were k1 = (1.51 ± 0.15) × 10−12 cm3 molecule−1 s−1, k2 = (16.0 ± 1.7) × 10−12 cm3 molecule−1 s−1, k3 = (66.5 ± 7.5) × 10−12 cm3 molecule−1 s−1, k4 = (46.8 ± 4.9) × 10−12 cm3 molecule−1 s−1 and k5 = (0.85 ± 0.09) × 10−12 cm3 molecule−1 s−1. The rates of reaction of these alkyl iodides with Cl atoms in the marine boundary layer were compared with the rates of their photolysis and their reaction with OH. For early morning conditions, it is shown that reaction with Cl atoms can compete with photolysis and dominate over reaction with OH, if Cl atom concentrations are about 1 × 105 molecule cm−3. Atomic iodine may be released following reaction of Cl with the alkyl iodides; this atomic I can participate in catalytic destruction of ozone in the marine boundary layer.

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.