Premium
Void‐Assisted Ion‐Paired Proton Transfer at Water–Ionic Liquid Interfaces
Author(s) -
de Eulate Eva Alvarez,
Silvester Debbie S.,
Arrigan Damien W. M.
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201507556
Subject(s) - ionic liquid , phosphonium , chemistry , ion , electrochemistry , alkali metal , proton , ionic bonding , inorganic chemistry , polymer chemistry , organic chemistry , electrode , physics , quantum mechanics , catalysis
Abstract At the water–trihexyl(tetradecyl)phosphonium tris(pentafluoroethyl)trifluorophosphate ([P 14,6,6,6 ][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.