4.8 Article

Hydrogen-Bond Dynamics in a Protic Ionic Liquid: Evidence of Large-Angle Jumps

Journal

JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 3, Issue 20, Pages 3034-3038

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/jz301334j

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Funding

  1. Deutsche Forschungsgemeinschaft (DFG)

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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.

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