Kinetics of OH radical reaction with anthracene and anthracene-d10

The Journal of Physical Chemistry. a
Rajeshwar AnanthulaPhilip H Taylor

Abstract

Using a refined pulsed laser photolysis/pulsed laser-induced fluorescence (PLP/PLIF) technique, the kinetics of the reaction of a surrogate three-ring polynuclear aromatic hydrocarbons (PAH), anthracene (and its deuterated form), with hydroxyl (OH) radicals was investigated over the temperature range of 373 to 1200 K. This study represents the first examination of the OH kinetics for this class of reactions at elevated temperatures (>470 K). The results indicate a complex temperature dependence similar to that observed for simpler aromatic compounds, e.g., benzene. At low temperatures (373-498 K), the rate measurements exhibited Arrhenius behavior (k = 1.82 x 10(-11) exp(542.35/T) in units of cm3 molecule(-1) s(-1)), and the kinetic isotope effect (KIE) measurements were consistent with an OH-addition mechanism. The low-temperature results are extrapolated to atmospheric temperatures and compared with previous measurements. Rate measurements between 673 and 923 K exhibited a sharp decrease in the magnitude of the rate coefficients (a factor of 9). KIE measurements under these conditions were still consistent with an OH-addition mechanism. The following modified Arrhenius equation is the best fit to our anthracene measurements b...Continue Reading

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Citations

Sep 13, 2012·Journal of Environmental Monitoring : JEM·Franz S EhrenhauserKalliat T Valsaraj
Jan 23, 2016·Proceedings of the National Academy of Sciences of the United States of America·Marissa L WeichmanDaniel M Neumark
Jun 3, 2014·The Science of the Total Environment·Juan DangWenxing Wang
Jan 18, 2020·International Journal of Molecular Sciences·Carlos Diaz-UribeCesar Quiñones

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