一種具有酸催化活性的離子液體，具有如式(I)所示結構，其中，取代基R選自氫基、烷基、烷氧基，或硝基。 This invention provides ionic liquids having acidic catalytic activity which having the structure as indicated in formula (I), wherein, the substitution group R is selected from hydrogen, alkyl group, alkoxy group or nitro group.
