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Title: Suppression of Fast Proton Conduction by Dilution of a Hydronium Solvate Ionic Liquid: Localization of Ligand Exchange
Authors: Kawata, Kio
Kitada, Atsushi  kyouindb  KAKEN_id  orcid (unconfirmed)
Tsuchida, Naoki
Saimura, Masayuki
Nagata, Takashi  kyouindb  KAKEN_id  orcid (unconfirmed)
Katahira, Masato
Fukami, Kazuhiro
Murase, Kuniaki  kyouindb  KAKEN_id  orcid (unconfirmed)
Author's alias: 川田, 稀士
北田, 敦
永田, 崇
片平, 正人
深見, 一弘
邑瀬, 邦明
Issue Date: 2020
Publisher: Institute of Physics Publishing
Journal title: Journal of the Electrochemical Society
Volume: 167
Issue: 4
Thesis number: 046508
Abstract: A dilution effect on the proton conduction of a hydronium solvate ionic liquid [H₃O⁺centerdot18C6]Tf₂N, which consists of hydronium ion (H₃O⁺), 18-crown-6-ether ligand (18C6), and bis[(trifluoromethyl)sulfonyl]amide anion (Tf₂N⁻; Tf = CF₃SO₂), has been studied. When [H₃O⁺・18C6]Tf₂N was diluted using equimolar 18C6 solvent, the distinctive fast proton conduction in [H₃O⁺・18C6]Tf₂N was suppressed in stark contrast to the case of common protic ionic liquids. Nuclear magnetic resonance spectroscopy showed that the fast exchange between free 18C6 molecules and coordinated ones, suggesting that the added solvent had induced a local proton exchange rather than a cooperative proton relay.
Rights: This is the Accepted Manuscript version of an article accepted for publication in Journal of the Electrochemical Society. The Electrochemical Society and IOP Publishing Ltd are not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at
This is not the published version. Please cite only the published version.
DOI(Published Version): 10.1149/1945-7111/ab75fc
Appears in Collections:Journal Articles

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