Abstract
For the first time, the carboxyl-functionalized ionic liquid 1-carboxyethyl-3-methylimidazolium chloride, [C2COOHmim][Cl], was synthesized and characterized. The acidity constant of [C2COOHmim]+ was determined experimentally and by computational simulations, and the result was compared with the acidic constant of propanoic acid. Density and viscosity measurements supported with computational simulations of the dilute aqueous solutions of [C2COOHmim][Cl] were performed. Based on these measurements, interactions between water and newly synthesized ionic liquid were discussed. The obtained values of viscosity B-coefficient, Hepler's coefficient and results of computational simulations showed that the introduced carboxyl group enhances the hydration and structure making properties of the imidazolium-based ionic liquids.
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