Revisiting Ionic Liquid Structure-Property Relationship: A Critical Analysis

Citation:
Silva, W, Zanatta M, Ferreira AS, Corvo MC, Cabrita EJ.  2020.  Revisiting Ionic Liquid Structure-Property Relationship: A Critical Analysis, {OCT}. International Journal of Molecular Sciences. 20:7745., Number {20}

Abstract:

{In the last few years, ionic liquids (ILs) have been the focus of extensive studies concerning the relationship between structure and properties and how this impacts their application. Despite a large number of studies, several topics remain controversial or not fully answered, such as: the existence of ion pairs, the concept of free volume and the effect of water and its implications in the modulation of ILs physicochemical properties. In this paper, we present a critical review of state-of-the-art literature regarding structure-property relationship of ILs, we re-examine analytical theories on the structure-property correlations and present new perspectives based on the existing data. The interrelation between transport properties (viscosity, diffusion, conductivity) of IL structure and free volume are analysed and discussed at a molecular level. In addition, we demonstrate how the analysis of microscopic features (particularly using NMR-derived data) can be used to explain and predict macroscopic properties, reaching new perspectives on the properties and application of ILs.}

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