Journal article
Gas phase reactions of iodide and bromide anions with ozone: evidence for stepwise and reversible reactions.
Mahendra Bhujel, David L Marshall, Alan T Maccarone, Benjamin I McKinnon, Adam J Trevitt, Gabriel da Silva, Stephen J Blanksby, Berwyck LJ Poad
Physical Chemistry Chemical Physics | Royal Society of Chemistry | Published : 2020
DOI: 10.1039/d0cp01498b
Abstract
Despite the impacts - both positive and negative - of atmospheric ozone for life on Earth, there remain significant gaps in our knowledge of the products, mechanisms and rates of some of its most fundamental gas phase reactions. This incomplete understanding is largely due to the experimental challenges involved in the study of gas-phase reactions of ozone and, in particular, the identification of short-lived reaction intermediates. Here we report direct observation of the stepwise reaction of the halide anions iodide (I-) and bromide (Br-) with ozone to produce XO3- (where X = I and Br, respectively). These results substantially revise the rate constant for the I- + O3 reaction to 1.1 (± 0...
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Awarded by Australian Research Council
Funding Acknowledgements
The data reported in this paper were obtained at the Central Analytical Research Facility (CARF), operated by the Institute for Future Environments at the Queensland University of Technology. Access to CARF is supported by generous funding from the Science and Engineering Faculty (QUT). M. B. acknowledges funding from QUT in the form of a PhD write-up scholarship. A. J. T., B. L. J. P., and S. J. B. acknowledge financial support from the Australian Research Council (ARC) through the Discovery Project scheme (DP140101237 and DP170101596). The authors thank A/Prof. Stephen Wilson (UOW) for insightful conversations.