title: Hydrogen-Bond Dynamics in a Protic Ionic Liquid: Evidence of Large-Angle Jumps.
abstract: We study the molecular rotation of the protic room-temperature ionic liquid ethylammonium nitrate with dielectric relaxation spectroscopy and femtosecond-infrared spectroscopy (fs-IR) of the ammonium N-H vibrations. The results suggest that the rotation of ethylammonium ion takes place via large angular jumps. Such nondiffusive reorientational dynamics is unique to strongly hydrogen-bonded liquids such as water and indicates that the intermolecular interaction is highly directional in this class of ionic liquids.
authors: †FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.|‡Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
authors: Johannes
authors: J
authors: Hunger
authors: §Institut für Physikalische und Theoretische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany.
authors: Thomas
authors: T
authors: Sonnleitner
authors: †FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors: Liyuan
authors: L
authors: Liu
authors: §Institut für Physikalische und Theoretische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany.
authors: Richard
authors: R
authors: Buchner
authors: †FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.|‡Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
authors: Mischa
authors: M
authors: Bonn
authors: †FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors: Huib J
authors: HJ
authors: Bakker
keywords: dielectric spectroscopy; ethylammonium nitrate; liquid dynamics; molecular rotation; time-resolved infrared spectroscopy