Journal article
Interactions and dynamics in ionic liquids
Journal of Physical Chemistry B, Vol.112(16), pp.4854-4858
2008
Abstract
Precise dielectric spectra have been determined at 25°C over the exceptionally broad frequency range of 0.1 ≤ v/GHz ≤ 3000 for the imidazolium-based room-temperature ionic liquids (RTILs) [bmim] [BF 4], fbmim]-[PFO], [bmim][DCA], and [hmim][BF4]. The spectra are dominated by a low-frequency process at ∼1 GHz with a broad relaxation time distribution of the Cole-Davidson or Cole-Cole type, which is thought to correspond to the rotational diffusion of the dipolar cations. In addition, these RTILs possess two Debye relaxations at ∼5 GHz and ∼0.6 THz and a damped harmonic oscillation at ∼2.5 THz. The two higher-frequency modes are almost certainly due to cation librations, but the origin of the ∼5 GHz mode remains obscure.
Details
- Title
- Interactions and dynamics in ionic liquids
- Authors/Creators
- A. Stoppa (Author/Creator)J. Hunger (Author/Creator)R. Buchner (Author/Creator)G. Hefter (Author/Creator)A. Thoman (Author/Creator)H. Helm (Author/Creator)
- Publication Details
- Journal of Physical Chemistry B, Vol.112(16), pp.4854-4858
- Publisher
- American Chemical Society
- Number of pages
- 5
- Identifiers
- 991005543725307891
- Copyright
- © 2008 American Chemical Society.
- Murdoch Affiliation
- School of Chemical and Mathematical Science
- Language
- English
- Resource Type
- Journal article
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