Experimental and theoretical study on ion association in [Hmim][halide] + water/isopropanol mixtures

The electrical conductivities of the dilute solutions containing ionic liquids (1-hexyl-3-methylimidazolium chloride [Hmim]Cl, 1-hexyl-3-methylimidazolium bromide [Hmim]Br, and iodide [Hmim]I) with water isopropanol were determined in temperature ranging from 293.15 to 313.15 K. liquid densities all binary mixtures further for model parameterization. In theoretical modeling, limiting molar Λ0(T) first obtained using Debye-Hückel-Onsager (DHO) equation, thereafter ion association constants KA(T) Shedlovsky equation. effects temperature, dielectric constant, anion size on values systematically discussed. Eyring activation enthalpy charge transport ∆H* Walden Λ0η studied temperature-dependent Λ0(T).