Zheng, Zhuan-Ping and Fan, Wen-Hui and Roy, Soham and Mazur, Kamila and Nazet, Andreas and Buchner, Richard and Bonn, Mischa and Hunger, Johannes (2015) Ionic Liquids: Not only Structurally but also Dynamically Heterogeneous. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 54 (2). pp. 687-690. ISSN 1433-7851, 1521-3773
Full text not available from this repository. (Request a copy)Abstract
In recent years, the complex and heterogeneous structure of ionic liquids has been demonstrated; however, the consequences on the dynamics have remained elusive. Here, we use femtosecond IR spectroscopy to elucidate the local structural dynamics in protic alkylammonium-based ionic liquids. The structural relaxation after an ultrafast temperature increase, following vibrational excitation and subsequent relaxation of the N-D (or N-H) stretching vibration, is found to vary substantially between the ionic and hydrophobic subdomains. The dynamics in the ionic domains are virtually unaffected by the alkyl chain length and is, therefore, decoupled from viscosity. Equilibration within the hydrophobic subdomains, as evident from the dynamics of the C-H stretching vibration, is faster than that in the ionic domains and shows a remarkably low thermal activation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SOLVENTS; ionic liquids; IR spectroscopy; thermal equilibration |
| 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: | 25 Jul 2019 12:49 |
| Last Modified: | 25 Jul 2019 12:49 |
| URI: | https://pred.uni-regensburg.de/id/eprint/6113 |
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