Ionic liquid analogous formed from magnesium chloride hexahydrate and its physico-chemical properties

Abstract

In this paper, a homogeneous, colorless ionic liquid analogous containing choline chloride and magnesium chloride hexahydrate is reported. The structure of the ionic liquid analogous is preliminarily investigated by Fourier transform infrared spectroscopy (FTIR). It is shown that the magnesium chloride hexahydrate bonds via hydrogen bonds with choline chloride. The physico-chemical properties of the ionic liquid analogous such as melting point, viscosity, conductivity and density are measured as a function of temperature and composition. A straight line equation is used to fit the density data while the Arrhenius equation is used to fit both viscosity and conductivity. The thermal expansion coefficients (r), the molar Gibbs energy of activation (ΔG*) for viscous flow, the molar enthalpy of activation (ΔH*) and the molar entropy of activation (ΔS*) for viscous flow have been calculated.