Synthesis of novel fluorous imidazolium ionic liquids

Abstract

– The synthesis of a novel class of fluorous ionic liquids was investigated. The 1,3- and 1,2-diperfluoroalkylated imidazolium salts 1 and 2 were successfully prepared. Unfortunately, most of them were solids and had low fluorophilicity. On the other hand, most imidazolium salts 3-8 possessing one or two tris(perfluoroalkyl)silyl groups in cation moiety were liquids at room temperature and had high fluorophilicity independent of the kind of anion moiety. Additionally, dicationic bisimidazolium ionic liquids 10 having two tris(tridecafluorooctyl)silylpropyl groups were also prepared and showed good fluorophilicity.