Phase Transition Behaviour of Amphiphilic Supermolecules Possessing a Semiperfluorinated Alkyl Chain

Recently we have found that a novel amphiphilic compound, 1H, 1H, 2H, 2H-heptadecafluoro-1-decyl 3, 4, 5- tris[6-(4′-cyanobiphenyl-4-yloxy)hexyloxy]benzoate, exhibited the phase sequence of isotropic liquid -smectic A-bicontinuous cubic-crystal. In this study, we have prepared compounds possessing b...

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Bibliographic Details
Published in:Molecular crystals and liquid crystals (Philadelphia, Pa. : 2003) Pa. : 2003), 2007-12, Vol.479 (1), p.181/[1219]-189/[1227]
Main Authors: Yamaguchi, Akihisa, Yoshizawa, Atsushi
Format: Article
Language:English
Subjects:
cubic phase
liquid crystals
oligomers
phase transition
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Summary:Recently we have found that a novel amphiphilic compound, 1H, 1H, 2H, 2H-heptadecafluoro-1-decyl 3, 4, 5- tris[6-(4′-cyanobiphenyl-4-yloxy)hexyloxy]benzoate, exhibited the phase sequence of isotropic liquid -smectic A-bicontinuous cubic-crystal. In this study, we have prepared compounds possessing biphenyl groups or alkyl chains instead of the cyanobiphenyl groups of the amphiphilic compound and investigated their liquid-crystalline properties using optical microscopy and differential scanning calorimetry. The compound possessing the biphenyl groups was found to exhibit a columnar phase, however, the compound possessing the alkyl chains did not show any liquid-crystalline phase. We discuss the structure-property relationship in the amphiphilic oligomers.
ISSN:1542-1406
1563-5287
DOI:10.1080/15421400701732423