« Previous AbstractThe fate of methyl salicylate in the environment and its role as signal in multitrophic interactions    Next AbstractApplication of volatile and spectral profiling together with multimode data fusion strategy for the discrimination of preserved eggs »

J Environ Sci (China)

Title:		Kinetic and product studies of the reactions of NO(3) with a series of unsaturated organic compounds
Author(s):		Ren Y; McGillen M; Ouchen I; Daele V; Mellouki A;
Address:		"Centre National de la Recherche Scientifique (CNRS) (UPR 3021), Observatoire des Sciences de l'Univers en region Centre (OSUC), Institut de Combustion, Aerothermique, Reactivite et Environnement (ICARE), Orleans 45071, France. Centre National de la Recherche Scientifique (CNRS) (UPR 3021), Observatoire des Sciences de l'Univers en region Centre (OSUC), Institut de Combustion, Aerothermique, Reactivite et Environnement (ICARE), Orleans 45071, France; Le Studium Loire Valley Institute for Advanced Studies, Orleans 45071, France. Earth Sciences Department, Scientific Institute, Mohammed V University, Rabat 10106, Morocco. Centre National de la Recherche Scientifique (CNRS) (UPR 3021), Observatoire des Sciences de l'Univers en region Centre (OSUC), Institut de Combustion, Aerothermique, Reactivite et Environnement (ICARE), Orleans 45071, France. Electronic address: mellouki@cnrsorleans.fr"
Journal Title:		J Environ Sci (China)
Year:		2020
Volume:		20200504
Issue:
Page Number:		111 - 120
DOI:		10.1016/j.jes.2020.03.022
ISSN/ISBN:		1001-0742 (Print) 1001-0742 (Linking)
Abstract:		"Rate coefficients for the reaction of NO(3) radicals with 6 unsaturated volatile organic compounds (VOCs) in a 7300 L simulation chamber at ambient temperature and pressure have been determined by the relative rate method. The resulting rate coefficients were determined for isoprene, 2-carene, 3-carene, methyl vinyl ketone (MVK), methacrolein (MACR) and crotonaldehyde (CA), as (6.6 +/- 0.8) x 10(-13), (1.8 +/- 0.6) x 10(-11), (8.7 +/- 0.5) x 10(-12), (1.24 +/- 1.04) x 10(-16), (3.3 +/- 0.9) x 10(-15) and (5.7 +/- 1.2) x 10(-15) cm(3)/(molecule*sec), respectively. The experiments indicate that NO(3) radical reactions with all the studied unsaturated VOCs proceed through addition to the olefinic bond, however, it indicates that the introduction of a carbonyl group into unsaturated VOCs can deactivate the neighboring olefinic bond towards reaction with the NO(3) radical, which is to be expected since the presence of these electron-withdrawing substituents will reduce the electron density in the pi orbitals of the alkenes, and will therefore reduce the rate coefficient of these electrophilic addition reactions. In addition, we investigated the product formation from the reactions of 2-carene and 3-carene with the NO(3) radical. Qualitative identification of an epoxide (C(10)H(16)OH(+)), caronaldehyde (C(10)H(16)O(2)H(+)) and nitrooxy-ketone (C(10)H(16)O(4)NH(+)) was achieved using a proton transfer reaction time-of-flight mass spectrometer (PTR-TOF-MS) and a reaction mechanism is proposed"
Keywords:		*Air Pollutants Kinetics *Volatile Organic Compounds NO(3) radical Products Rate coefficient Volatile organic compounds (VOCs);
Notes:		"MedlineRen, Yangang McGillen, Max Ouchen, Ibrahim Daele, Veronique Mellouki, Abdelwahid eng Netherlands 2020/07/13 J Environ Sci (China). 2020 Sep; 95:111-120. doi: 10.1016/j.jes.2020.03.022. Epub 2020 May 4"