Raman spectroscopy of glycerol/D2O solutions
Raman spectroscopy of glycerol/D2O solutions
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DOI：
10.1016/j.vibspec.2007.04.002
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发表时间：
2007-10-18
影响因子：
2.5
通讯作者：
Pemberton, Jeanne E.
中科院分区：
文献类型：
--
作者：
Mudalige, Anoma;Pemberton, Jeanne E.
给出了纯甘油、纯D_2O和甘油/D_2O溶液的拉曼光谱，其中甘油摩尔分数（X-G）分别为0.00、0.02、0.12、0.32和1.00。讨论了在1000-1600和2000-3700 cm（-1）光谱区观察到的谱带的振动归属。当用D2 O稀释纯甘油时，甘油通过其氧原子作为氢键受体与D2 O氢键结合。随着甘油的逐步稀释，D2 O破坏纯甘油中存在的二聚体和更高的低聚物，形成甘油单体。由于D2 O网络的最小扰动，X-G 0.02溶液中的D2 O分子处于与纯D2 O类似的环境中。在X-G 0.12溶液中由于弱氢键D2 O而没有带，这表明大多数D2 O比纯D2 O中的氢键更强，这在D2 O团簇中会发生。X-G 0.32溶液中的D2 O处于独特的环境中，因为它们完全失去了氢键网络，作为单体混入溶液中。(C)2007 Elsevier B. V.保留所有权利。
Raman spectra of neat glycerol, neat D2O, and glycerol/D2O solutions with glycerol mole fractions (X-G) of 0.00, 0.02, 0.12 and 0.32 and 1.00 are presented. Vibrational assignments are discussed for the bands observed in the 1000-1600 and 2000-3700 cm(-1) spectral regions. Upon dilution of neat glycerol with D2O, glycerol hydrogen-bonds with D2O through its oxygen atoms as hydrogen-bond acceptors. With progressive glycerol dilution, D2O breaks the dimers and higher oligomers present in neat glycerol to form glycerol monomers. D2O molecules in the X-G 0.02 solution are in an environment similar to that of neat D2O due to minimal perturbation of the D2O network. The absence of bands due to weakly hydrogenbonded D2O in the X-G 0.12 solution suggests that most D2O are more strongly hydrogen-bonded than in neat D2O as would occur in D2O Clusters. D2O in X-G 0.32 solutions are in a unique environment in that they lose their hydrogen-bonding network completely, mixing into the solution as monomers. (C) 2007 Elsevier B.V. All rights reserved.