Dimer Biphenyl Liquid Crystals with Trisiloxane-Containing Spacers

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

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

Dimeric biphenyl liquid crystals with trisiloxane containing spacers were studied. Both the tail lengths and the spacer lengths to a central hexamethyltrisiloxane group were varied. In most cases a SmC-phase was found with an anticlinic interlayer relation. One of the compounds appears to have a SmA-phase, which could be a de Vries SmA-phase. A few other compounds show liquid crystalline polymorphism. X-ray diffraction experiments show that the smectic layers are strongly interdigitated. The thickness of the layers is mainly dependent on the length of the spacers. The length of the terminal alkyl chains hardly influences the smectic layer thickness.
LanguageEnglish
Pages169-176
JournalMolecular Crystals and Liquid Crystals
Volume477
Issue number1
DOIs
Publication statusPublished - 2007

Fingerprint

Liquid Crystals
Polymorphism
Dimers
Liquid crystals
spacers
liquid crystals
dimers
Crystalline materials
X ray diffraction
Liquids
Experiments
polymorphism
interlayers
liquids
diffraction
diphenyl
x rays

Keywords

  • mesogenic fluorinated organosiloxanes
  • polar order
  • phase
  • chirality
  • systems
  • series

Cite this

Achten, R. ; Koudijs, A. ; Giesbers, M. ; Marcelis, A.T.M. ; Sudhölter, E.J.R. / Dimer Biphenyl Liquid Crystals with Trisiloxane-Containing Spacers. In: Molecular Crystals and Liquid Crystals. 2007 ; Vol. 477, No. 1. pp. 169-176.
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Dimer Biphenyl Liquid Crystals with Trisiloxane-Containing Spacers. / Achten, R.; Koudijs, A.; Giesbers, M.; Marcelis, A.T.M.; Sudhölter, E.J.R.

In: Molecular Crystals and Liquid Crystals, Vol. 477, No. 1, 2007, p. 169-176.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Koudijs, A.

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AU - Sudhölter, E.J.R.

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AB - Dimeric biphenyl liquid crystals with trisiloxane containing spacers were studied. Both the tail lengths and the spacer lengths to a central hexamethyltrisiloxane group were varied. In most cases a SmC-phase was found with an anticlinic interlayer relation. One of the compounds appears to have a SmA-phase, which could be a de Vries SmA-phase. A few other compounds show liquid crystalline polymorphism. X-ray diffraction experiments show that the smectic layers are strongly interdigitated. The thickness of the layers is mainly dependent on the length of the spacers. The length of the terminal alkyl chains hardly influences the smectic layer thickness.

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KW - polar order

KW - phase

KW - chirality

KW - systems

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