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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Dielectric properties of binary and ternary mixtures of alcohols: Analysis of H-bonded interaction in complex systems
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Dielectric properties of binary and ternary mixtures of alcohols: Analysis of H-bonded interaction in complex systems

机译：醇的二元和三元混合物的介电性能：复杂系统中氢键相互作用的分析

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摘要

The heterogeneous H-bonded interactions in mixtures of glass-former liquids, i.e., binary mixtures of ethyl alcohol (EA) with ethylene glycol (EG) and ternary mixtures of equi-molar EA + EG system with glycerol (Gly) have been investigated at 21 concentrations by using precisely measured values of static and high frequency limiting dielectric constants at 25 degrees C. Concentration dependent observed negative values of excess dielectric constant (epsilon(E)) and effective Kirkwood correlation factor (g(eff)) implies the formation of H-bonded complexes between EA and EG molecules which reduces the effective number of dipoles. The EA + EG system forms the strongest complexes corresponding to the molar ratio similar to 1: 1. The observed positive epsilon(E) values of the (EA + EG) + Gly ternary mixtures confirm the increase in number of effective dipoles contributed to the dielectric constant values due to the formation of the ternary complexes. Critical analysis of the experimental results of the EA + EG and the (EA + EG) + Gly mixtures suggest the suitability of epsilon(E) and g(eff) study in order to explain the dipolar ordering mechanism formed during the complexes between the alcohol molecules in their ternary mixtures. (c) 2007 Elsevier B.V. All rights reserved.
机译：研究了玻璃前体液体混合物（即乙醇（EA）与乙二醇（EG）的二元混合物以及等摩尔EA + EG系统与甘油（Gly）的三元混合物）中的异质H键相互作用。通过在25摄氏度下使用静态和高频极限介电常数的精确测量值来确定21种浓度。与浓度有关的过量介电常数（epsilon（E））和有效柯克伍德相关因子（g（eff））的负值表示形成EA和EG分子之间的H键复合物可降低偶极子的有效数量。 EA + EG系统形成最强的络合物，对应的摩尔比类似于1：1。观察到的（EA + EG）+ Gly三元混合物的正ε（E）值证实，增加了有效偶极子的数量介电常数值归因于三元复合物的形成。对EA + EG和（EA + EG）+ Gly混合物的实验结果进行的批判性分析表明，ε（ε）和g（eff）研究的适用性，以解释在醇与醇之间的络合物形成的偶极有序机制三元混合物中的分子。 （c）2007 Elsevier B.V.保留所有权利。

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