Hyper-Raman investigation of intermolecular vibrations of water and ice
Hyper-Raman investigation of intermolecular vibrations of water and ice
复制标题
水和冰分子间振动的超拉曼研究
DOI：
10.1002/jrs.5459
复制
发表时间：
2018
影响因子：
2.5
通讯作者：
H. Hamaguchi
中科院分区：
文献类型：
--
作者：
V. Korepanov;Chun Yu;H. Hamaguchi
我们使用高重复率 (200 kHz) 皮秒脉冲 Nd:YAG 激光器构建了超拉曼优化光谱仪。该系统已应用于测量液态水和冰（H2O 和 D2O），以获得具有高信噪比的超拉曼光谱。已经获得了水和冰的独特振动光谱，与红外吸收和拉曼散射不同。在超拉曼光谱中观察到低波数区域的分子间带，其强度高于分子内带。他们显示 H/D 同位素变化与他们对聚集水的解放和平移运动的分配完全一致。研究发现，从液态水到冰，解放带会转变为更高的波数，这表明冰中的环境比水中的环境更受限制。超拉曼光谱将为液态水和冰中分子间相互作用提供新的线索，作为传统红外和拉曼振动光谱的补充。
We have constructed a hyper‐Raman optimized spectrometer using a high repetition rate (200 kHz) picosecond‐pulsed Nd:YAG laser. This system has been applied to measure liquid water and ice (H2O and D2O) to obtain their hyper‐Raman spectra with high signal‐to‐noise ratios. Unique vibrational spectra of water and ice, distinct either from infrared absorption and Raman scattering, have been obtained. The intermolecular bands in the low‐wavenumber region are observed in the hyper‐Raman spectra with intensities higher than those of the intramolecular ones. They show H/D isotope shifts fully consistent with their assignments to the librational and translational motions of assembled water. The librational bands are found to shift to higher wavenumber on going from liquid water to ice, indicating a more confining environment in ice than in water. Hyper‐Raman spectroscopy will shed new light, complementary to the traditional infrared and Raman vibrational spectroscopies, on intermolecular interactions in liquid water and ice.
影响因子：
7.4
作者：
C. Xu;J. Shear;W. Webb
通讯作者：
C. Xu;J. Shear;W. Webb