Temperature dependence of the rate coefficient for the α-pinene reaction with ozone in the range between 243 K and 303 K

Literature Information

Publication Date 2009-02-09
DOI 10.1039/B813407C
Impact Factor 3.676
Authors

Ralf Tillmann, Harald Saathoff, Theo Brauers, Astrid Kiendler-Scharr, Thomas F. Mentel


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Abstract

The absolute rate coefficient for the reaction of α-pinene with ozone was determined in the temperature range between 243 K and 303 K at atmospheric pressure. In total, 30 experiments were performed in the large (85 m3) temperature-controlled simulation chamber AIDA, where the concentrations of the reactants ozone and α-pinene were measured directly. An Arrhenius expression for the α-pinene + ozone reaction was derived with a pre-exponential factor of (1.4 ± 0.4) × 10−15 cm3 s−1 and a temperature coefficient of (833 ± 86) K. This rate coefficient is in good agreement (−5%) with the current IUPAC (IUPAC 2007) recommendation at 298 K. The IUPAC recommendation is significantly larger (+27%), around 243 K where the recommended values were extrapolated from higher temperatures. This finding is relevant for tropical regions where strong updrafts can rapidly transport reactive hydrocarbons like α-pinene from the boundary layer into the cold regions of the free troposphere.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 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.

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