Chen, Liuping and Gross, Thomas and Lüdemann, Hans-Dietrich (2000) The T, p-dependence of the chemical shift of the hydroxyl protons in deeply supercooled methanol and water. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 55 (3-4). pp. 473-477. ISSN 0932-0784
Full text not available from this repository.Abstract
The hydroxyl proton chemical shifts delta ((H) under bar - O) of supercooled methanol (T-min = 149 K) and water have been determined (T-min = 183 K), and the pressure dependence of these shifts was measured up to 200 MPa. In both compounds the downfield shift of delta ((H) under bar - O) continues down to the lowest temperatures reached. This result disagrees with the two state models for the hydrogen bond formation in both liquids. The isotherms delta ((H) under bar(2)O) show for T less than or equal to 273 K an upfield shift that becomes more pronounced with decreasing temperature. For delta ((H) under bar - O - CH3), increasing p causes at all temperatures a downshift.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NUCLEAR-MAGNETIC-RESONANCE; PRESSURE-DEPENDENCE; HYDROGEN-BONDS; LIQUID METHANOL; TEMPERATURE; NMR; supercooling; pressure; methanol; water |
| Subjects: | 500 Science > 530 Physics 500 Science > 570 Life sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Biophysik und physikalische Biochemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 May 2022 08:50 |
| Last Modified: | 31 May 2022 08:50 |
| URI: | https://pred.uni-regensburg.de/id/eprint/42814 |
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