Raman light scattering studies of the depolarized Rayleigh wing of liquids and solutions
Raman light scattering studies of the depolarized Rayleigh wing of liquids and solutions
复制标题
液体和溶液的去偏振瑞利翼的拉曼光散射研究
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
J. Lascombe
中科院分区：
文献类型：
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作者：
M. Perrot;M. H. Brooker;J. Lascombe
多种液体和溶液的去偏振瑞利翼区 (10–300 cm−1) 的拉曼光谱已采用信号平均技术以数字形式记录。对称化的 I(?) 光谱已被重新转换为 I(?)?2 格式，将瑞利光谱转换为与远红外吸收直接相当的形式。该过程的主要优点是它抑制了激励线并强调了微弱的低频峰值。因此，先前报道的“峰”的基本特征得到了更高精度的确认。还首次观察到环己烷、丙酮和正十四烷的峰。这些峰似乎反映了单个各向异性分子外坐标的短时行为，不应与基本振动或负组合模式混淆。对于液态苯，研究浓度变化（在四氯化碳中）、温度变化和同位素取代的影响...
Raman spectra of the depolarized Rayleigh wing region (10–300 cm−1) of a number of liquids and solutions have been recorded in digital form employing signal averaging techniques. The symmetrized I(?) spectra have been recast in an I(?)?2 format which transforms the Rayleigh spectra into forms directly comparable to far‐infrared absorption. The major advantage of this procedure is that it suppresses the exciting line and emphasizes the weak low frequency peaks. As a result, the basic characteristics of the ’’peaks’’ previously reported are confirmed with improved precision. Peaks have also been observed for the first time for cyclohexane, acetone, and n‐tetradecane. These peaks appear to reflect the short‐time behavior of the external coordinates of individual anisotropic molecules and should not be confused with fundamental vibrational or negative combination modes. For liquid benzene, studies of the effects of concentration change (in carbon tetrachloride), temperature change, and isotopic substitution c...