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New dicationic piperidinium hexafluorophosphate ILs, Synthesis, characterization and dielectric measurements

A new class of dicationic ionic liquids (ILs) was synthesized for electrochemical applications at high temperatures. The syntheses are based on a dialkylation reaction of N-alkylpiperidine followed by anion exchange. The structures of ILs, based on the piperidinium combined with hexafluorophosphate anion, were identified by using 1H, 13C, 19F, 31P NMR and FT-IR spectroscopy. ILs thermal properties were investigated in the temperature range from -50 to 350°C by using differential scanning calorimetry (DSC). In the frequency 10-2 - 106 Hz range, dielectric measurements were performed on ILs samples at various temperatures from -80 to 20°C, i.e. around the glass transition...

Autoren:   Boumediene, Haddad , Didier, Villemin , El-habib, Belarbi , Nathalie, Bar , Mustapha, Rahmouni
Journal:   Arabian Journal of Chemistry
Jahrgang:   2011
DOI:   10.1016/j.arabjc.2011.01.002
Erscheinungsdatum:   09.01.2011

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