Hunger, Johannes and Stoppa, Alexander and Buchner, Richard and Hefter, Glenn (2008) From Ionic Liquid to Electrolyte Solution: Dynamics of 1-N-Butyl-3-N-methylimidazolium Tetrafluoroborate/Dichloromethane Mixtures. JOURNAL OF PHYSICAL CHEMISTRY B, 112 (41). pp. 12913-12919. ISSN 1520-6106,
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Dielectric spectra have been measured at 25 degrees C for mixtures of the room temperature ionic liquid 1-N-butyl-3-N-methylimidazolium tetrafluoroborate (IL) with dichloromethane (DCM) over the entire composition range at frequencies 0.2 less than or similar to v/GHz <= 89. The spectra could be satisfactorily fitted by assuming only two relaxation modes: a Cole-Cole process at lower frequencies and a Debye process at higher frequencies. However, detailed analysis indicated that both spectral features contain additional modes, which could not be resolved due to overlaps. The spectra indicate that the IL appears to retain its chemical character to extraordinarily high levels of dilution (X-IL greater than or similar to 0.5) in DCM. At even higher dilutions (X-IL less than or similar to 0.3), the IL behaves as a conventional but strongly associated electrolyte.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | N-ETHYLPYRROLIDINIUM DICYANAMIDE; DIELECTRIC RESPONSE; PAIR FORMATION; TEMPERATURE; RELAXATION; SPECTROSCOPY; PERMITTIVITY; ASSOCIATION; CATALYSIS; SOLVENTS; |
| 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: | 21 Oct 2020 10:08 |
| Last Modified: | 21 Oct 2020 10:08 |
| URI: | https://pred.uni-regensburg.de/id/eprint/30173 |
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