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Abstract
Using laser photolysis experiments, the reactivity of the nitrate radical towards four carbonyl compounds and three carboxylic acids was studied. All kinetics measurements were carried out as a function of the temperature in the range from 278 K to 318 K. Furthermore, the effect of the acid-base equilibrium on the reactivity of the three acids was studied by measuring the activation parameters of the dissociated and undissociated acids at pH = 6 and pH = 0.5, respectively. The following Arrhenius expressions were obtained: [Formulas: see text]. Errors stated throughout this study are statistical errors for a confidence interval of 95%. The importance of the obtained results for the understanding of the tropospheric oxidation processes is discussed. The kinetics resulting from this work are compared with results for other atmospheric radicals.
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