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Issue 7, 2013
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Fluorosulfonyl-(trifluoromethanesulfonyl)imide ionic liquids with enhanced asymmetry

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Abstract

New ionic liquids with an asymmetric anion, fluorosulfonyl-(trifluoromethanesulfonyl)imide (FTFSI), were prepared and their chemical–physical properties were investigated. The ionic liquids based on N-methyl-N-propylpyrrolidinium, PYR13, N-butyl-N-methylpyrrolidinium, PYR14, and N-methoxyethyl-N-methylpyrrolidinium, PYR12O1, exhibit high electrochemical stability (>5.5 V on platinum) and thermal stability (>250 °C in N2 and >200 °C in O2). Due to the highly asymmetric anion, the prepared ionic liquids do not crystallize down to −150 °C while maintaining ionic conductivity above 10−4 S cm−1 even at −40 °C. Conductivity and viscosity values at 20 °C are in the range 3.5–5.0 mS cm−1 and 30–60 mPa s respectively. PFG-NMR measurements showed high self-diffusion coefficients of cations and the anion.

Graphical abstract: Fluorosulfonyl-(trifluoromethanesulfonyl)imide ionic liquids with enhanced asymmetry

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Publication details

The article was received on 02 Sep 2012, accepted on 12 Dec 2012 and first published on 12 Dec 2012


Article type: Paper
DOI: 10.1039/C2CP43066E
Citation: Phys. Chem. Chem. Phys., 2013,15, 2565-2571
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    Fluorosulfonyl-(trifluoromethanesulfonyl)imide ionic liquids with enhanced asymmetry

    J. Reiter, S. Jeremias, E. Paillard, M. Winter and S. Passerini, Phys. Chem. Chem. Phys., 2013, 15, 2565
    DOI: 10.1039/C2CP43066E

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