One-pot sustainable synthesis of tetrabutylammonium bis(trifluoromethanesulfonyl)imide ionic liquid

Silvia Mena, Gonzalo Guirado*

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)


Tetrabutylammonium bis(trifluoromethanesulfonyl)imide (TBA TFSI) and tetrafluororate-based anion ionic liquids (ILs) were obtained simultaneously by using a fast, versatile, cheap, low cost, and one-pot process. The process relies on dissolving tetrabutylammonium tetrafluoroborate salt, an organic-based bis(trifluoromethanesulfonyl) imide, ILs, such as 1-ethyl-3-methylimidazolium, N-trimethyl-N-butylammonium, 1-butyl-1-methylpyrrolidinium, 1-methyl-1-propylpiperidinium derivatives in dimethylformamide. A further extraction process using water and ether allows the selective recovery of the TBA TFSI in the organic phase, and the organic-based tetrafluoroborate IL in the aqueous phase. All the ionic liquids synthetized were characterized using Infrared Spectroscopy and Nuclear Magnetic Resonance, and compared with commercially available samples.

Original languageEnglish
Article number113393
JournalJournal of Molecular Liquids
Publication statusPublished - 15 Aug 2020


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