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Density scaling and isodynes in glycerol–water mixtures
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2024-11-08 , DOI: 10.1039/d4cp02231a
David B. Noirat, Bernhard Frick, Bo Jakobsen, Markus Appel, Kristine Niss

This paper presents dielectric and neutron spectroscopy data on two different glycerol–water mixtures at elevated pressures. Glycerol–water liquid mixtures have a high concentration of hydrogen bonds which usually is expected to lead to complex dynamics. However, with regard to the pressure dependence of the dynamics we reveal a surprisingly simple picture. Different aspects of the dynamics have the same pressure dependence, in other words the phase diagram of the liquids have so-called isodynes, density scaling is also observed to hold reasonably well and there is even some reminiscence of isochronal superposition. This suggests that these aspect of liquid dynamics are very general and hold for different types of intermolecular interactions.

中文翻译:


甘油-水混合物中的密度缩放和等差



本文介绍了高压下两种不同甘油-水混合物的介电和中子光谱数据。甘油-水液体混合物具有高浓度的氢键,这通常会导致复杂的动力学。然而,关于动力学的压力依赖性,我们揭示了一个非常简单的画面。动力学的不同方面具有相同的压力依赖性,换句话说,液体的相图具有所谓的等差,也观察到密度缩放保持得相当好,甚至有一些等时叠加的回忆。这表明液体动力学的这些方面非常普遍,并且适用于不同类型的分子间相互作用。
更新日期:2024-11-08
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