O -phenylene octamers as surface modifiers for homeotropic columnar ordering of discotic liquid crystals

Takashi Kajitani, Yuki Suna, Atsuko Kosaka, Terutsune Osawa, Shigenori Fujikawa, Masaki Takata, Takanori Fukushima, Takuzo Aida

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Large-area homeotropic columnar ordering of π-conjugated discotic liquid crystals (LCs) is crucial for certain device applications but generally hard to achieve. Here we report polymeric o-phenylene octamer poly-1 and its monomer 1 as the first surface modifiers for homeotropic columnar order of a variety of discotic LCs up to a macroscopic length scale. Their octameric o-phenylene parts are known to fold helically into a cylinder that is reminiscent of a π-stacked column of discotic LCs. Through-view X-ray diffraction patterns of 1 suggested that this molecule adheres to the glass substrate and directs its cylindrical axis perpendicular to the glass surface. This "face-on" orientation likely nucleates the homeotropic columnar order of discotic LC materials.

Original languageEnglish
Pages (from-to)14564-14567
Number of pages4
JournalJournal of the American Chemical Society
Volume135
Issue number39
DOIs
Publication statusPublished - Oct 2 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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