Conduction Through Viscoelastic Phase in a Redox-Active Ionic Liquid at Reduced Temperatures

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Abstract

The phase diagram of the redox active ionic liquid 1-methyl-3-propylimidazolium iodide (PMII) is examined as a function of temperature and iodine concentration. Beyond a threshold concentration of 3.9 M, the formation of higher polyiodides gives rise to a viscoelastic phase upon cooling. Despite of the very high viscosity of such polyiodide-containing PMII melts a strikingly high conductivity is maintained through Grotthuss-type bond exchange and ionic conduction.

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Subject classification (UKÄ) – MANDATORY

  • Physical Chemistry

Keywords

  • ionic liquids, liquid crystals, conducting materials, polyiodides, mesophases, viscoelastic phase
Original languageEnglish
Pages (from-to)781
JournalAdvanced Materials
Volume24
Issue number6
Publication statusPublished - 2012
Publication categoryResearch
Peer-reviewedYes