Summary
Studies of the UV absorption spectra as well as the kinetics and products of reactions of the following organic peroxy radicals have been carried out: CH3O2, CH2=CHCH2O2, HOCH2CH2O2, CH3CH(OH)CH(O2)CH3, (CH3)2C(OH)CH2O2, (CH3)2CH(OH)CH(O2)(CH3)2, CH3OCH2O2, CH3C(O)CH2O2 and C2H5C(O)O2. These radicals were chosen to be representative of those formed from the degradation of some classes of volatile organic compound (VOC) likely to be important in tropospheric chemistry (i.e. alkanes, alkenes, conjugated dienes, alcohols, ethers, aldehydes and ketones). Kinetic studies of the self reactions and reactions with HO2 were carried out using the molecular modulation technique and the laser flash photolysis technique, coupled with UV absorption spectroscopy. Product studies were carried out by long pathlength Fourier transform infra-red spectroscopy and UV-visible diode array spectroscopy. This work has also allowed investigation of a variety of laboratory sources of peroxy radicals.
The results have been used, along with those obtained by other LACTOZ participants, to establish trends of reactivity of peroxy radicals, and to assign rate coefficients to complex peroxy radicals, in particular those formed from the OH-initiated degradation of isoprene. A degradation mechanism of isoprene to first generation products has been assembled, incorporating these data, which gives a good description of the product yields measured in other laboratory studies.
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© 1997 Springer-Verlag Berlin Heidelberg
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Jenkin, M.E., Hayman, G.D., Cox, R.A., Murrells, T.P. (1997). Laboratory Studies of Peroxy Radical Reactions of Importance for Tropospheric Chemistry. In: Le Bras, G. (eds) Chemical Processes in Atmospheric Oxidation. Transport and Chemical Transformation of Pollutants in the Troposphere, vol 3. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59216-4_9
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DOI: https://doi.org/10.1007/978-3-642-59216-4_9
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