Broad ranges and fast responses of single-component blue-phase liquid crystals containing banana-shaped 1,3,4-oxadiazole cores

I. Hung Chiang, Chun Ji Long, Hsin-Chieh Lin, Wei Tsung Chuang, Jey Jau Lee, Hong-Cheu Lin

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

In this study, we synthesized two novel 1,3,4-oxadiazole-based bent-core liquid crystals (OXD7, OXD5B7F) containing a chiral tail that display broad ranges of the blue phase III (34 and 7 K, respectively); we characterized them using polarized optical microscopy, differential scanning calorimetry, and circular dichroism. The electro-optical responses of both of these liquid crystals are much faster than those of previously reported single-component blue-phase liquid crystals. To optimize its electro-optical performance, we mixed OXD7* (the blue-phase range of which is broader than that of OXD5B7F) with its analogue OXD6 (at weight ratios of 6:4 and 4:6). We also performed molecular modeling of single-component BPLCs (OXD7* and OXD5B7F) to analyze the possible parameters affecting their blue phase ranges.

Original languageEnglish
Pages (from-to)228-235
Number of pages8
JournalACS Applied Materials and Interfaces
Volume6
Issue number1
DOIs
StatePublished - 8 Jan 2014

Keywords

  • bent-core liquid crystal
  • blue phase III
  • chiral tail
  • circular dichroism
  • single-component blue phase

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