Skip to main content
Article thumbnail
Location of Repository

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

By Boumediene Haddad, Didier Villemin, El-habib Belarbi, Nathalie Bar and Mustapha Rahmouni

Abstract

A new class of dicationic ionic liquids (ILs) were 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 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 of 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 temperature. The peak relaxation was observed near to this temperature. Also, the conductivity was investigated and the energy activation determined. The temperature dependence of the relaxation times was shown to be governed by the Arrhenius equation

Topics: Ionic liquids, Bis-piperidinium, Hexafluorophosphate anion, Dielectric relaxation, Conductivity, Chemistry, QD1-999
Publisher: Elsevier
Year: 2014
DOI identifier: 10.1016/j.arabjc.2011.01.002
OAI identifier: oai:doaj.org/article:315026af2dad4f958923b83a9948e35a
Journal:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • https://doaj.org/toc/1878-5352 (external link)
  • http://www.sciencedirect.com/s... (external link)
  • https://doaj.org/article/31502... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.