Laser photolysis-resonance fluorescence investigation of the reactions of hydroxyl radicals with CCl3CHO and CF3CHO as a function of temperature

Gerard Laverdet; Georges Le Bras; Helene MacLeod; G. Poulet; S. Teton; Donncha J.P. Scollard; John J. Treacy; H. W. Sidebottom

doi:10.1117/12.140210

12 February 1993 Laser photolysis-resonance fluorescence investigation of the reactions of hydroxyl radicals with CCl₃CHO and CF₃CHO as a function of temperature

Gerard Laverdet, Georges Le Bras, Helene MacLeod, G. Poulet, S. Teton, Donncha J.P. Scollard, John J. Treacy, H. W. Sidebottom

Author Affiliations +

Proceedings Volume 1715, Optical Methods in Atmospheric Chemistry; (1993) https://doi.org/10.1117/12.140210
Event: Environmental Sensing '92, 1992, Berlin, Germany

Abstract

Absolute rate constants for the reactions of OH radicals with CCl₃CHO and CF₃CHO have been determined as a function of temperature using a pulsed laser photolysis-resonance fluorescence technique. The rate constant for reaction with CCl₃CHO, k(CCl₃CHO) equals 1.4 +/- 0.2 cm³ molecule^-1 s^-1, was found to be virtually independent of temperature over the range 233 - 313 K while the Arrhenius expression obtained for reaction with CF₃CHO was k(CF₃CHO) equals 3.5 +/- 1.0 X 10^-12 exp [-(488 +/- 57)/T] cm³ molecule^-1 s^-1. Reactivity trends and atmospheric implications are discussed.

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Gerard Laverdet, Georges Le Bras, Helene MacLeod, G. Poulet, S. Teton, Donncha J.P. Scollard, John J. Treacy, and H. W. Sidebottom "Laser photolysis-resonance fluorescence investigation of the reactions of hydroxyl radicals with CCl₃CHO and CF₃CHO as a function of temperature", Proc. SPIE 1715, Optical Methods in Atmospheric Chemistry, (12 February 1993); https://doi.org/10.1117/12.140210

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