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Communication | Special issue | Vol 101, No. 1, 2020, pp.104-115
Published online, 26th July, 2019
DOI: 10.3987/COM-19-S(F)17
Synthesis of Novel Fluorous Imidazolium Ionic Liquids

Mitsunori Honda,* Ryu Nakajima, Ko-Ki Kunimoto, and Masahito Segi*

*Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan

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.