Relaxation dynamics in glycerol-water mixtures. 2. Mesoscopic feature in water rich mixtures

被引：77
|
作者：
Hayashi, Y [1 ]
Puzenko, A [1 ]
Balin, I [1 ]
Ryabov, YE [1 ]
Feldman, Y [1 ]
机构：
[1] Hebrew Univ Jerusalem, Dept Appl Phys, IL-91904 Jerusalem, Israel
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 18期
关键词：
D O I：
10.1021/jp050425d
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The relaxation dynamics of water-rich glycerol-water mixtures is studied by broadband dielectric spectroscopy (BDS) at 173-323 K and differential scanning calorimetry (DSC) at 138-313 K. These data indicate the existence of the critical concentration of 40 mol % glycerol. In the studied temperature range for water-rich glycerol mixtures, the two states of water (ice and interfacial water) are observed in addition to water in the mesoscopic 40 mol % glycerol-water domains. The possible kinetics of water exchange between different water states is discussed in order to explain the mechanism of the broad melting behavior observed by DSC.
引用
收藏
页码：9174 / 9177
页数：4
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