Liquid crystalline dimers with bent-core mesogenic units

R. Achten, A. Koudijs, M. Giesbers, A.T.M. Marcelis, E.J.R. Sudhölter, M.W. Schroeder, W. Weissflog

Research output: Contribution to journalArticleAcademicpeer-review

25 Citations (Scopus)

Abstract

Two series of dimers, in which two identical aromatic bent core mesogenic units are connected via an organosiloxane or an alkylene spacer, have been investigated. The dimers with a spacer consisting of a trisiloxane central group and relatively long alkylene groups show an intercalated tilted smectic structure. The layer spacings appear to be very weakly dependent on the terminal chain lengths. In these dimers the smectic phase is stabilized for the compounds with a short terminal chain. Dimers with an aliphatic alkylene spacer are liquid crystalline only when the spacer is relatively short and the terminal chains are long. For these dimers a monolayer tilted smectic phase is observed.
Original languageEnglish
Pages (from-to)59-64
JournalLiquid Crystals
Volume34
Issue number1
DOIs
Publication statusPublished - 2007

Keywords

  • polar order
  • achiral molecules
  • chirality
  • antiferroelectricity
  • ferroelectricity
  • mesophases
  • spacer
  • phase

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