Stoppa, Alexander and Hunger, Johannes and Buchner, Richard and Hefter, Glenn and Thoman, Andreas and Helm, Hanspeter (2008) Interactions and dynamics in ionic liquids. JOURNAL OF PHYSICAL CHEMISTRY B, 112 (16). pp. 4854-4858. ISSN 1520-6106,
Full text not available from this repository. (Request a copy)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][BF4], [bmim][PF6], [bmim][DCA], and [hmim][BF4]. The spectra are dominated by a low-frequency process at similar to 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 similar to 5 GHz and similar to 0.6 THz and a damped harmonic oscillation at similar to 2.5 THz. The two higher-frequency modes are almost certainly due to cation librations, but the origin of the similar to 5 GHz mode remains obscure.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | KERR-EFFECT SPECTRA; DIELECTRIC-RELAXATION; NANOSTRUCTURAL ORGANIZATION; ELECTROLYTE-SOLUTIONS; SOLVATION DYNAMICS; BINARY-MIXTURES; TEMPERATURE; SPECTROSCOPY; TETRAFLUOROBORATE; PERMITTIVITY; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 Nov 2020 07:35 |
| Last Modified: | 04 Nov 2020 07:35 |
| URI: | https://pred.uni-regensburg.de/id/eprint/31035 |
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