Changes in the structure of water deduced from the pressure dependence of the Raman OH frequency
- 1 April 2004
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 120 (13) , 5867-5870
- https://doi.org/10.1063/1.1689639
Abstract
We report on the Raman spectra of water under high temperature and pressure conditions and show a discontinuity in the pressure dependence of the OH stretching frequency. As pressure increases, the strength of hydrogen bonding increases rapidly in the pressure ranges up to 0.4±0.1 GPa at 25 °C, 1.0±0.1 GPa at 100 °C, and 1.3±0.1 GPa at 300 °C and slowly above these pressures. This finding clearly demonstrates the existence of discontinuities in the pressure response of the hydrogen bonds of water, which suggests a possible structural change under these conditions.Keywords
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