The reaction of hydrated iodide I(HO) with ozone: a new route to IO products.

Author(s) Teiwes, R.; Elm, J.; Bilde, M.; Pedersen, H.B.
Journal Phys Chem Chem Phys
Date Published 2019 May 28
Abstract

We report on an experimental characterization of the isolated reaction of hydrated iodide I(H2O)- with ozone O3 at room temperature performed using a radio-frequency ion trap combined with a quadrupole mass spectrometer. Contrary to the oxidation reaction of the bare I- ion, the hydrated iodide I(H2O)- primarily reacts to form I- and IO2- with significant absolute reaction rate constants of 2.0 ± 0.3 × 10-10 cm3 molecule-1 s-1 and 2.5 ± 0.3 × 10-10 cm3 molecule-1 s-1 while direct pathways to IO- and IO3- are much weaker. Quantum chemical calculations indicate that in aqueous phase and for atmospherically relevant temperatures, the presence of hydrated iodides are favored over bare I- ions, thus suggesting that the chemistry of the hydrated ions is relevant for understanding and modeling atmospheric processes at the air-water interface.

DOI 10.1039/c9cp01734h
ISSN 1463-9084
Citation Teiwes R, Elm J, Bilde M, Pedersen HB. The reaction of hydrated iodide I(HO) with ozone: a new route to IO products. Phys Chem Chem Phys. 2019.

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