High birefringent reactive discotic liquid crystals based on asymmetrical triphenylene with phenyl-acetylene moieties

Hyein Jung, Jungshin Park, Mijin Choi, Jinsoo Kim, Yun Ho Kim, Eunkyoung Kim, Mi Hye Yi, Jae Won Ka

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Triphenylene (TP)-based liquid crystals, a category of discotic liquid crystals (DLCs), are easy to synthesise, thermally stable and can undergo self-assembly. A new DLC compound, 2,7,10-tris[4-(6-acryloyloxyhexyloxy)benzoate]-3,6,11-tris[(4-hexylphenyl)ethynyl]-triphenylene, was obtained with a 49% yield using catechol as a starting material and features acetylene groups on its TP core. This material can form films with high birefringence through its cross-linkable acrylate ends. Here, we synthesised this new compound and characterised it using nuclear magnetic resonance spectroscopy, mass spectrometry and elemental analysis. The thermal behaviour was also investigated using differential scanning calorimetry and polarised optical microscopy. This new asymmetric TP-based DLC compound exhibited a nematic liquid-crystalline phase between −20 and 170°C and formed an optical anisotropic film with a high birefringence (Δn = 0.21–0.25).

Original languageEnglish
Pages (from-to)1069-1077
Number of pages9
JournalLiquid Crystals
Volume44
Issue number7
DOIs
Publication statusPublished - 2017 May 28

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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