Synthesis and Spectroscopic Characterization of Protic Tris(2-Hydroxyethyl)-Ammonium Ionic Liquids

Abstract

Protic ionic liquids (PILs) having tris(2-hydroxyethyl)ammonium (or triethanolammonium) as cations and methacrylate, dihydrogenborate, formate, acetate as anions have been synthesized through stoichiometric neutralization reaction. PILs have been characterized by elemental analyses, FTIR, 1H and 13C NMR spectroscopic methods. The viscosity of PIL4 was measured using a cone-and-plate viscometer at ambient temperature. The viscosity value indicates that the fluidity of PIL4 is 829 cP (the water viscosity is 0.7977 cP at 30 °C).