Separate dynamics of solute and solvent in water-glucose solutions by depolarized light scattering
Separate dynamics of solute and solvent in water-glucose solutions by depolarized light scattering
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DOI：
10.1016/j.cplett.2007.05.025
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发表时间：
2007-06-25
影响因子：
2.8
通讯作者：
Scarponi, F.
中科院分区：
文献类型：
--
作者：
Fioretto, D.;Comez, L.;Scarponi, F.
本文报道了双单色仪和多通法布里-珀罗干涉仪在0.01 ~ 1000 cm（-1）宽光谱范围内对水-葡萄糖溶液的去偏振光散射测量。第一次给出了与葡萄糖动力学相关的低频弛豫过程与水动力学分离的证据。这种低频过程与电介质光谱检测到的广泛弛豫特征有不同的起源，并根据单个葡萄糖分子的斯托克斯-爱因斯坦-德拜旋转扩散来解释。(c) 2007 Elsevier B.V.版权所有
We report depolarized light scattering measurements of water-glucose solutions in a wide spectral range from 0.01 to 1000 cm(-1), performed by the combined use of a double monocromator and a multipass Fabry-Perot interferometer. For the first time evidence is given of a low frequency relaxation process related to the glucose dynamics well separated from that of water. This low frequency process has a different origin with respect to the broad relaxation feature detected by dielectric spectroscopy and is interpreted in terms of Stokes-Einstein-Debye rotational diffusion of single glucose molecules. (c) 2007 Elsevier B.V. All rights reserved.