The reaction of isotope-substituted hydrated iodide I(H 182O)− with ozone: the reactive influence of the solvent water molecule

文献情報

出版日 2020-08-20

DOI 10.1039/D0CP03219K

インパクトファクター 3.676

著者

Henrik B. Pedersen, Jonas Elm, Christian H. Frederiksen, Simon P. S. Jessen, Ricky Teiwes, Merete Bilde

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要旨

We report an investigation of the reaction of isotope-substituted hydrated iodide I(H182O)− with ozone 16O3 to examine the involvement of the water molecules in the oxidation reactions that terminate with the formation of IO3−. Experimentally, we studied the reaction in the gas phase as elementary reactions using a radio-frequency (RF) ion-trap combined with a quadrupole mass spectrometer (QMS). In approximately 1.2% of the reactions of I(H182O)− and 16O3, the 18O atom is found to appear in iodine oxide anions, thus giving evidence for a close involvement of the water molecule in a non-negligible number of the reactions towards IO3−. As a part of the experimental investigation, the reaction rate constant for the exchange reaction I(H182O)− + H162O → I(H162O)− + H182O at 300 K was found to be (1.3 ± 0.1) × 10−8 cm3 s−1. Quantum chemical calculations are exploited to establish the energetic difference between I(H182O)− and I(H162O)−.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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