A study of the IR and UV-Vis absorption cross-sections, photolysis and OH-initiated oxidation of CF3CHO and CF3CH2CHO

Literature Information

Publication Date 2004-02-23
DOI 10.1039/B315941H
Impact Factor 3.676
Authors

Stig R. Sellevåg, Tanya Kelly, Howard Sidebottom, Claus J. Nielsen


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Abstract

Infrared and ultraviolet-visible absorption cross-sections, effective quantum yields of photolysis and OH reaction rate coefficients for CF3CHO and CF3CH2CHO are reported. Relative rate measurements at 298(2) K and 1013(10) hPa, give k(OH + CF3CHO)/k(OH + CH3CH3) = 2.00(13), k(OH + CF3CH2CHO)/k(OH + CH3CH2OH) = 1.21(5) and k(OH + CF3CH2CHO)/k(OH + HC(O)OC2H5) = 3.51(9) (2σ). The effective quantum yield of photolysis was measured under pseudo-natural conditions in the European simulation chamber, Valencia, Spain (EUPHORE). Over the wavelength range 290–400 nm, the effective quantum yields of photolysis for CF3CHO and CF3CH2CHO are less than 2 × 10−2 and 4 × 10−2, respectively. The tropospheric lifetimes are estimated to be: τOH(CF3CHO) ∼ 26 days; τphotol(CF3CHO) > 27 days; τOH(CF3CH2CHO) ∼ 4 days; τphotol(CF3CH2CHO) > 15 days.

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DOI: 10.1039/C6CP90122K

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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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