Synthesis, properties and catalysis of novel methyl- or ethyl- sulfate-anion-based acidic ionic liquids

In this paper, two kinds of novel acidic ionic liquids containing methyl- or ethyl-sulfate anions can be easily and efficiently prepared. The density, viscosity, thermal property of these ILs, and temperature dependency of ionic conductivity were measured and investigated in detail. The catalysis of ionic liquids to the Fisher esterifications was also studied.