Pressure response of Raman spectra of water and its implication to the change in hydrogen bond interaction |
| |
Authors: | Okada Taku Komatsu Kazuki Kawamoto Tatsuhiko Yamanaka Takamitsu Kagi Hiroyuki |
| |
Affiliation: | Laboratory for Earthquake Chemistry, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan. okataku@ess.sci.osaka-u.ac.jp |
| |
Abstract: | In situ Raman spectroscopic measurements of water in the region of OH vibration were conducted up to 0.4 GPa at 23 and 52 degrees 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 degrees C, but not at 52 degrees 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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|