Facilitated Ion Transport in Smectic Ordered Ionic Liquid Crystals

Jin Hong Lee, Kee Sung Han, Je Seung Lee, Albert S. Lee, Seo Kyung Park, Sung Yun Hong, Jong Chan Lee, Karl T. Mueller, Soon Man Hong, Chong Min Koo

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


A novel ionic mixtures of an imidazolium based room-temperature ionic liquid (IL) containing ethylene oxide functionalized phosphite anions with a lithium salt was reported that was able to self-assemble into smectic ordered IL crystals. The [DMIm][MPEGP] compound, featuring an ethylene oxide chain grafted on the phosphite anion, was synthesized through a two-step reaction. The transparent room-temperature IL product of [DMIm][MPEGP] revealed no melting behavior, but a glass transition temperature at -67°C as obtained via DSC analysis. The experimental temperature window was limited up to 200°C due to the thermal instability of the IL at higher temperatures. The synchrotron SAXS profiles for the IL and ionic mixtures with varied amounts of LiTf 2 N at room temperature. Meanwhile, the ionic mixtures with intermediate salt concentrations revealed characteristic scattering peaks, indicating the presence of structural regularity.

Original languageEnglish
Pages (from-to)9301-9307
Number of pages7
JournalAdvanced Materials
Issue number42
Publication statusPublished - 2016 Jan 1
Externally publishedYes


  • ionic liquids
  • liquid crystals
  • self-assembly
  • smectic order

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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