光谱学与光谱分析, 2012, 32 (5): 1259, 网络出版: 2012-06-14
压强对冰Ⅶ相结构影响的拉曼光谱研究
Study of Ice Ⅶ Structure Influenced by High Pressure Using Raman Spectrum
摘要
测量了室温下2.5~23 GPa压强下冰Ⅶ相的拉曼光谱。 测量结果表明: 随压强增加, 冰的氧原子间距离dO—O减小, 使氢键长度变短, 导致O—H化学键键长增加, 力常数减小, 拉曼光谱发生红移。 质子(氢核)取向有序性随压强先增加而后减小致使拉曼光谱强度先增加而后减小; 拉曼光谱线宽先减小而后增加, 当压强约为13 GPa时呈现最小值。
Abstract
Raman spectra of ice Ⅶ phase were obtained at room temperature when the pressure was from 2.5 to 23 GPa. The experimental results indicate that the oxygen atoms distance do-o of ice decreased with pressure increasing, which results in that hydrogen bond is shortened, O—H bond is lengthened, force constant is reduced, and Raman spectra are red shifted. The orientation order of proton (hydrogen atom) is first increased and then decreased with varying the pressure, which leads to the Raman intensity increasing and then decreasing, and Raman linewidth is decreased and then increased, and the linewidth is the least when the pressure is 13 GPa.
贾丽华, 王一丁, 门志伟, 曲冠男, 里佐威, 何丽桥. 压强对冰Ⅶ相结构影响的拉曼光谱研究[J]. 光谱学与光谱分析, 2012, 32(5): 1259. JIA Li-hua, WANG Yi-ding, MEN Zhi-wei, QU Guan-nan, LI Zuo-wei, HE Li-qiao. Study of Ice Ⅶ Structure Influenced by High Pressure Using Raman Spectrum[J]. Spectroscopy and Spectral Analysis, 2012, 32(5): 1259.