Void-assisted ion-paired proton transfer at water-ionic liquid interfaces
Date
2015
Authors
Alvarez de Eulate, E.
Silvester, D.S.
Arrigan, D.W.M.
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Journal article
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Angewandte Chemie International Edition, 2015; 54(49):14903-14906
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Abstract
At the water-trihexyl(tetradecyl) phosphonium tris(pentafluoroethyl)trifluorophosphate ([P-14,P-6,P-6,P-6][FAP]) ionic liquid interface, the unusual electrochemical transfer behavior of protons (H+) and deuterium ions (D+) was identified. Alkali metal cations (such as Li+, Na+, K+) did not undergo this transfer. H+/D+ transfers were assisted by the hydrophobic counter anion of the ionic liquid, [FAP](-), resulting in the formation of a mixed capacitive layer from the filling of the latent voids within the anisotropic ionic liquid structure. This phenomenon could impact areas such as proton-coupled electron transfers, fuel cells, and hydrogen storage where ionic liquids are used as aprotic solvents.
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Copyright 2015 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. (https://creativecommons.org/licenses/by-nc-nd/3.0/au/legalcode)