Pressure response of Raman spectra of water and its implication to the change in hydrogen bond interaction

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• 作者：Taku Okada ; Kazuki Komatsu ; Tatsuhiko Kawamoto ; Takamitsu Yamanaka and Hiroyuki Kagi
• 关键词：Water ; Hydrogen bond ; High pressure ; Structural change ; Viscosity ; Raman spectroscopy
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：2005
• 出版时间：2005
• 年：2005
• 卷：61
• 期：10
• 页码：2423-2427
• 全文大小：268 K

文摘

In situ Raman spectroscopic measurements of water in the region of OH vibration were conducted up to 0.4 GPa at 23 and 52 °C. The frequencies of the decomposed OH stretching bands initially decreased with increasing pressure, reached a minimum at 0.15 GPa and increased up to 0.3 GPa and then decreased, which corresponds to the variations of the strength of hydrogen bonding. This variation was observed at 23 °C, but not at 52 °C, which suggests a change in pressure dependence on the hydrogen bond interaction between these two temperatures. Based on the equilibration model between hydrogen-bonded and nonhydrogen-bonded molecules, the present experimental results indicate that the pressure variation of the viscosity depends on the ratio of hydrogen-bonded molecules, rather than the strength of hydrogen bonding between molecules.