关键词: 离子液体, Br?nsted-Lewis双酸性离子液体, 催化剂

Abstract: Br?nsted-Lewis acidic ionic liquids are a novel type of catalysts which combine the characters of the Br?nsted-Lewis solid acids and the ionic liquids. Three characteristics of the B-L acidic ionic liquids are summarized in this paper based on the advance of synthetic route, characterization methods and applications of them nowadays. First, the B-L acidic ionic liquids make it possible that a step-by-step reaction is completed in one pot, in which B acid and L acid were added separately in different steps. Furthermore, a synergetic effect of B and L acid sites enhances the catalytic performance, which makes the B-L acidic ionic liquids raise the substrate conversion or product selectivity. The last but not the least, the B-L acidic ionic liquids have better performance in mass transfer and diffusion than B-L solid acids. These above features make the B-L acidic ionic liquids become a competitor of traditional acid catalysts, which reveals that the B-L acidic ionic liquids have good development prospects in industrial catalysis field.

Key words: ionic liquid, Br?nsted-Lewis acidic ionic liquid, catalyst