Turton, David A. and Hunger, Johannes and Hefter, Glenn and Buchner, Richard and Wynne, Klaas (2008) Glasslike behavior in aqueous electrolyte solutions. JOURNAL OF CHEMICAL PHYSICS, 128 (16): 161102. ISSN 0021-9606,
Full text not available from this repository. (Request a copy)Abstract
When salts are added to water, generally the viscosity increases, suggesting that the ions increase the strength of the water's hydrogen-bond network. However, infrared pump-probe measurements on electrolyte solutions have found that ions have no influence on the rotational dynamics of water molecules, implying no enhancement or breakdown of the hydrogen-bond network. Here, we report optical Kerr effect and dielectric relaxation spectroscopic measurements, which have enabled us to separate the effects of rotational and transitional motions of the water molecules. These data show that electrolyte solutions behave like a supercooled liquid approaching a glass transition in which rotational and translational molecular motions are decoupled. It is now possible to understand previously conflicting viscosity data, nuclear magnetic resonance relaxation, and ultrafast infrared spectroscopy in a single unified picture. (c) 2008 American Institute of Physics.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DIELECTRIC-RELAXATION; RAMAN-SCATTERING; WATER; LIQUIDS; SPECTROSCOPY; TRANSITION; DYNAMICS; IONS; 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 07:27 |
| Last Modified: | 04 Nov 2020 07:27 |
| URI: | https://pred.uni-regensburg.de/id/eprint/31034 |
Actions (login required)
 |
View Item |
