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Chemosphere

Title:		"Atmospheric degradation of 2-chloroethyl vinyl ether, allyl ether and allyl ethyl ether: Kinetics with OH radicals and UV photochemistry"
Author(s):		Antinolo M; Ocana AJ; Aranguren JP; Lane SI; Albaladejo J; Jimenez E;
Address:		"Departamento de Quimica Fisica, Facultad de Ciencias y Tecnologias Quimicas, Universidad de Castilla-La Mancha, Avda. Camilo Jose Cela, 1B, Ciudad Real, 13071, Spain; Instituto de Investigacion en Combustion y Contaminacion Atmosferica, Universidad de Castilla-La Mancha, Camino de Moledores s/n, Ciudad Real, 13071, Spain. Departamento de Quimica Fisica, Facultad de Ciencias y Tecnologias Quimicas, Universidad de Castilla-La Mancha, Avda. Camilo Jose Cela, 1B, Ciudad Real, 13071, Spain. Instituto de Investigaciones en Fisicoquimica de Cordoba, Departamento de Fisicoquimica, Facultad de Ciencias Quimicas, Centro Laser de Ciencias Moleculares, Universidad Nacional de Cordoba, Ciudad Universitaria, Pabellon Argentina, Ala 1, Cordoba, 5000, Argentina. Departamento de Quimica Fisica, Facultad de Ciencias y Tecnologias Quimicas, Universidad de Castilla-La Mancha, Avda. Camilo Jose Cela, 1B, Ciudad Real, 13071, Spain; Instituto de Investigacion en Combustion y Contaminacion Atmosferica, Universidad de Castilla-La Mancha, Camino de Moledores s/n, Ciudad Real, 13071, Spain. Electronic address: Elena.Jimenez@uclm.es"
Journal Title:		Chemosphere
Year:		2017
Volume:		20170418
Issue:
Page Number:		232 - 240
DOI:		10.1016/j.chemosphere.2017.04.053
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"Unsaturated ethers are oxygenated volatile organic compounds (OVOCs) emitted by anthropogenic sources. Potential removal processes in the troposphere are initiated by hydroxyl (OH) radicals and photochemistry. In this work, we report for the first time the rate coefficients of the gas-phase reaction with OH radicals (k(OH)) of 2-chloroethyl vinyl ether (2ClEVE), allyl ether (AE), and allyl ethyl ether (AEE) as a function of temperature in the 263-358 K range, measured by the pulsed laser photolysis-laser induced fluorescence technique. No pressure dependence of k(OH) was observed in the 50-500 Torr range in He as bath gas, while a slightly negative T-dependence was observed. The temperature dependent expressions for the rate coefficients determined in this work are: The estimated atmospheric lifetimes (tau(OH)) assuming k(OH) at 288 K were 3, 2, and 4 h for 2ClEVE, AE and AEE, respectively. The kinetic results are discussed in terms of the chemical structure of the unsaturated ethers by comparison with similar compounds. We also report ultraviolet (UV) and infrared (IR) absorption cross sections (sigma(lambda) and sigma(nu ), respectively). We estimate the photolysis rate coefficients in the solar UV actinic region to be less than 10(-7) s(-1), implying that these compounds are not removed from the atmosphere by this process. In addition, from sigma(nu ) and tau(OH), the global warming potential of each unsaturated ether was calculated to be almost zero. A discussion on the atmospheric implications of the titled compounds is presented"
Keywords:		Atmosphere/*chemistry Ethers/*chemistry Global Warming Hydroxyl Radical/chemistry Kinetics Photochemistry/*methods Photolysis Pressure Sunlight Temperature Absorption cross sections Hydroxyl radicals Tropospheric chemistry Unsaturated ethers;
Notes:		"MedlineAntinolo, M Ocana, A J Aranguren, J P Lane, S I Albaladejo, J Jimenez, E eng England 2017/04/26 Chemosphere. 2017 Aug; 181:232-240. doi: 10.1016/j.chemosphere.2017.04.053. Epub 2017 Apr 18"