Asymmetry effect of novel per(fluoroalkylsulfonyl)imide anions in pyrrolidinium ionic liquids

Sebastian Jeremias, Maria Carewska, Lino Conte, Stefano Passerini, Giovanni Battista Appetecchi

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Ionic liquids based on the N-butyl-N-methylpyrrolidinium, (PYR 14)+, cation and different per(fluoroalkylsulfonyl)imide anions, having symmetric, (IM11)-, moderately asymmetric, (IM24)-, highly asymmetric, (IM14)- and (IMT4)-, and cyclic, (IM3)- structures, were properly synthesized. A few of the presented per(fluoroalkylsulfonyl)imide ions have never been reported in the literature as ionic liquid anions. The thermal and transport properties of the ionic liquid materials, having a common cation, were investigated and correlated with the structure of the per(fluoroalkylsulfonyl)imide anion. The results have indicated that the symmetry as well as the steric hindrance of the anion affect the melting point and the crystallization kinetics as well as the ion conduction and the self-diffusion coefficient of the ionic liquids. The conductivity data are in good agreement with the thermal measurements. © The Royal Society of Chemistry.
Original languageEnglish
Pages (from-to)17755 - 17761
Number of pages7
JournalRSC Advances
Issue number39
Publication statusPublished - 21 Oct 2013


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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