Columnar liquid crystals in oligosaccharide derivatives: II. Two types of discotic columnar liquid-crystalline phase of cellobiose alkanoates

Akihiko Takada, T. Fukuda, T. Miyamoto, Y. Yakoh, J. Watanabe

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23 Citations (Scopus)

Abstract

A series of cellobiose octaalkanoates, Cel-II-n (n is the carbon number of the alkyl chain), with n = 7–14 were prepared and their mesogenic properties examined by differential scanning calorimetry, optical polarizing microscopy and X-ray diffraction. All of these compounds form enantiotropic discotic columnar phases, in which the columns are built up by a regular stacking of the cellobiose moieties and are packed in a two dimensional lattice. Homologues with n = 9-14 form the Dho phase only whilst the compound with n = 7 forms the Dro phase. The n = 8 compound forms the Dho phase at higher temperatures and the Dro phase at lower temperatures. Structural parameters obtained from X-ray diffraction studies are presented for both phases.

Original languageEnglish
Pages (from-to)337-345
Number of pages9
JournalLiquid Crystals
Volume12
Issue number2
DOIs
Publication statusPublished - Jan 1 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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