Smectic Polymorphism and Fluctuations in a Polar Liquid-Crystal Binary Mixture
作者:
Y. Shi,
G. Nounesis,
C.W. Garland,
Satyendra Kumara,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 2000)
卷期:
Volume 351,
issue 1
页码: 119-125
ISSN:1058-725X
年代: 2000
DOI:10.1080/10587250008023260
出版商: Taylor & Francis Group
关键词: liquid-crystal phase transitions;calorimetry;x-ray scattering;tilted smectic antiphases
数据来源: Taylor
摘要:
High-resolution x-ray diffraction studies have been performed on the polar liquid-crystal binary mixture of octyl- and decyl-oxyphenyl nitrobenxoyloxy benzoate (47.4 mole% DB8ONO2+ 52.6% DB10ONO2). At temperatures below 127 °C this mixture exhibits the phase sequence (with decreasing temperature) smectic-Ad—reentrant nematic Nd—reentrant nematic N1—smectic-A1—tilted smectic antiphase smectic-[Ctilde]-smectic-A2—smectic-C2. The development of lateral fluid antiphase fluctuations from the partial bilayer fluctuations in the smectic-A1phase have been probed and analyzed as well as the transition from the tilted smectic antiphase to the tilted bilayer smectic-C2phase that is accompanied by the occurrence of an intermediate smectic-A2phase.
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