Tetrahedral order in homologous disaccharide-water mixtures -: art. no. 174513
Tetrahedral order in homologous disaccharide-water mixtures -: art. no. 174513
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DOI：
10.1063/1.1887167
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发表时间：
2005-05-01
影响因子：
4.4
通讯作者：
Taylor, J
中科院分区：
文献类型：
--
作者：
Branca, C;Maccarrone, S;Taylor, J
本工作旨在通过对不同温度下海藻糖和蔗糖水溶液的非弹性中子散射测量的分析，证明海藻糖具有“高渗透压”性质。中子谱是在英国奇尔顿的卢瑟福·阿普尔顿实验室的ISIS脉冲中子源上用MARI光谱仪采集的。为了研究同系双糖对水的四面体氢键网络的结构修饰作用，首先考察了纯水在不同温度下的振动性质。特别分析了分子内OH伸缩模式的温度行为。随后，比较了纯水和糖水溶液的振动性质，重点讨论了四面体网络的形成趋势。最后，将所得结果与前人的拉曼散射结果进行了比较，并在最近的分子动力学模拟工作框架下对结果进行了解释。(C)2005年美国物理研究所。
The present work aims at evidencing the "kosmotrope" nature of trehalose through the analysis of inelastic neutron scattering measurements on trehalose and sucrose water solutions at different temperatures. Neutron spectra were collected by using the spectrometer MARI at the ISIS pulsed neutron source of the Rutherford Appleton Laboratory (Chilton, UK). To study the structural modifications induced on the tetrahedral hydrogen-bond network of water by homologous disaccharides, as a first step, the vibrational properties of pure water at different temperatures have been investigated. In particular, the temperature behavior of the intramolecular OH stretching mode has been analyzed. Successively, the vibrational properties for pure water have been compared with those of the sugar water solutions focusing the attention on the tetrahedral network-forming tendency. Finally, the obtained findings have been compared with previous Raman scattering evidences, and the results interpreted in the frame of recent molecular dynamics simulation works. (c) 2005 American Institute of Physics.