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Atmospheric chemistry of iodine anions: elementary reactions of I, IO, and IO2 with ozone studied in the gas-phase at 300 K using an ion trap

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Abstract

Using a radio-frequency ion trap to study ion–molecule reactions under isolated conditions, we report a direct experimental determination of reaction rate constants for the sequential oxidation of iodine anions by ozone at room temperature (300 K). The results are R1: I + O3 → IO + O2, k1 = (7 ± 2) × 10−12 cm3 s−1; R2: IO + O3 → IO2 + O2, k2 = (10 ± 2) × 10−9 cm3 s−1; R3: IO2 + O3 → IO3 + O2, k3 = (16 ± 2) × 10−9 cm3 s−1. More oxidized forms such as IO4 and IO5 were not observed. Additionally, we performed quantum chemical calculations to elucidate the energetics of these oxidation reactions.

Graphical abstract: Atmospheric chemistry of iodine anions: elementary reactions of I−, IO−, and IO2− with ozone studied in the gas-phase at 300 K using an ion trap

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Publication details

The article was received on 10 Sep 2018, accepted on 31 Oct 2018 and first published on 08 Nov 2018


Article type: Paper
DOI: 10.1039/C8CP05721D
Citation: Phys. Chem. Chem. Phys., 2018, Advance Article
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    Atmospheric chemistry of iodine anions: elementary reactions of I, IO, and IO2 with ozone studied in the gas-phase at 300 K using an ion trap

    R. Teiwes, J. Elm, K. Handrup, E. P. Jensen, M. Bilde and H. B. Pedersen, Phys. Chem. Chem. Phys., 2018, Advance Article , DOI: 10.1039/C8CP05721D

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