Schroedle, Simon and Fischer, Bernd and Helm, Hanspeter and Buchner, Richard (2007) Picosecond dynamics and microheterogenity of water plus dioxane mixtures. JOURNAL OF PHYSICAL CHEMISTRY A, 111 (11). pp. 2043-2046. ISSN 1089-5639
Full text not available from this repository. (Request a copy)Abstract
Dielectric spectra from 200 MHz up to 3 THz were determined to study the fast dynamics of dilute water + 1,4-dioxane. epsilon(nu) could be fitted by a collision induced oscillator at high frequencies plus two Debye relaxations in the microwave region. Isotope substitution was used to assign water and dioxane modes. The presence of the cooperative hydrogen-bond network relaxation down to a water mole fraction of 0.005 suggests a microheterogeneous structure of the mixtures even at low water content. The collision mode of dioxane at similar to 2 THz grows upon water addition, revealing the presence of H2O molecules in dioxane-rich domains.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LOCAL ENERGY FLUCTUATIONS; TIME-DOMAIN SPECTROSCOPY; HYDROGEN-BONDS; COOPERATIVE DYNAMICS; VIBRATIONAL-SPECTRA; P-DIOXANE; RELAXATION; CYCLOHEXANE; LIQUIDS; RAMAN |
| 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: | 10 Aug 2023 07:08 |
| Last Modified: | 10 Aug 2023 07:08 |
| URI: | https://pred.uni-regensburg.de/id/eprint/33030 |
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