Dielectric relaxation and underlying dynamics of acetonitrile and 1-ethyl-3-methylimidazolium triflate mixtures using THz transmission spectroscopy
Dielectric relaxation and underlying dynamics of acetonitrile and 1-ethyl-3-methylimidazolium triflate mixtures using THz transmission spectroscopy
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DOI：
10.1063/1.1451054
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发表时间：
2002-06-15
影响因子：
4.4
通讯作者：
Taylor, AJ
中科院分区：
文献类型：
--
作者：
Asaki, MLT;Redondo, A;Taylor, AJ
我们使用太赫兹 (THz) 透射光谱来获得纯乙腈、纯 1-乙基-3-甲基咪唑鎓三氟甲磺酸盐（emim triflate，一种室温熔盐）以及两种液体的混合物的频率相关复介电函数。纯液体的行为通过两个（乙腈）或三个（emim triflate）德拜弛豫进行建模。然后，我们根据混合物中明显的修正德拜弛豫来讨论熔盐和溶剂的相互作用。我们确定，在低熔盐浓度下，混合物的行为类似于溶解在溶剂中的结晶盐的电解质溶液。在较高熔盐浓度下，其行为类似于两种液体的混合物。 (C) 2002 年美国物理研究所。
We use terahertz (THz) transmission spectroscopy to obtain the frequency dependent complex dielectric functions for pure acetonitrile, pure 1-ethyl-3-methylimidazolium triflate (emim triflate, a room temperature molten salt), and mixtures of the two liquids. The behavior of the pure liquids is modeled with either two (acetonitrile) or three (emim triflate) Debye relaxations. We then discuss the interactions of the molten salt and solvent based on the modified Debye relaxations evident in the mixtures. We determine that at low molten salt concentrations, the mixtures behave like electrolyte solutions of a crystalline salt dissolved in a solvent. At higher molten salt concentrations, the behavior is that of a mixture of two liquids. (C) 2002 American Institute of Physics.