Structural and dynamical properties of glucose aqueous solutions by depolarized Rayleigh scattering
Structural and dynamical properties of glucose aqueous solutions by depolarized Rayleigh scattering
复制标题
通过去偏振瑞利散射研究葡萄糖水溶液的结构和动力学性质
DOI：
10.1002/jrs.1909
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发表时间：
2008
影响因子：
2.5
通讯作者：
F. Scarponi
中科院分区：
文献类型：
--
作者：
M. Paolantoni;L. Comez;D. Fioretto;M. Gallina;A. Morresi;P. Sassi;F. Scarponi
摘要 DRS 光谱的研究可以对水溶液中的溶质和溶剂弛豫动力学进行不同的分析。纯水的 DRS 光谱作为温度的函数，成功地用 CD 函数表示，以再现弛豫过程。采用相同的模型来描述水在葡萄糖水溶液中的弛豫贡献，得出以下结论：（1）葡萄糖旋转扩散获得的弛豫时间不依赖于用于更快的水弛豫过程的函数形式：CD或德拜图7。与选定浓度的水-葡萄糖溶液的00相比，纯水从0到350cm 1 的磁化率00。减去从拟合程序获得的水和葡萄糖弛豫贡献后，光谱在 50 cm 1 波段的最大值上进行归一化。箭头表示浓度增加的方向。该图的彩色版本可在线获取：www.interscience.wiley.com/journal/jrs。
SUMMARY The study of DRS spectra permits the distinct analysisof solute- and solvent-relaxation dynamics in aqueoussolutions. DRS spectra of pure water as a function oftemperature are successfully represented by a CD functionto reproduce the relaxation process. The same model isadopted to describe the relaxational contribution of waterin glucose aqueous solutions, leading to the subsequentconclusions: (1) the relaxation times obtained for the glucoserotational diffusion do not depend on the functional formused for the faster water-relaxation process: a CD or Debye Figure 7. The susceptibility 00 of pure water from 0 to350 cm 1 ,comparedtothe 00 of water–glucose solutionsat selected concentrations. The spectra are normalized on themaximum of the 50 cm 1 band, after subtraction of water andglucose relaxation contributions obtained from the fittingprocedure. The arrow indicates the direction of a concentrationincrease. This figure is available in colour online atwww.interscience.wiley.com/journal/jrs.