Self-Assembly of Amphiphilic Liquid-Crystalline Oligomers Possessing a Semiperfluorinated Alkyl Chain

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• 作者：Akihisa Yamaguchi ; Yoji Maeda ; Hiroshi Yokoyama ; Atsushi Yoshizawa
• 刊名：Chemistry of Materials
• 出版年：2006
• 出版时间：November 28, 2006
• 年：2006
• 卷：18
• 期：24
• 页码：5704 - 5710
• 全文大小：708K
• 年卷期：v.18,no.24(November 28, 2006)
• ISSN：1520-5002

文摘

Amphiphilic liquid-crystalline oligomers composed of a semiperfluorinated alkyl chain and cyanobiphenyl mesogenic moieties were prepared. Their physical properties were investigated using opticalmicroscopy, differential scanning calorimetry, and X-ray diffraction measurements. The oligomers werefound to show an unusual phase sequence of lamellar-columnar-bicontinuous cubic phases when thenumber of cyabobiphenyl moieties was increased. Results of the XRD study suggest that the smectic Aphase of the oligomer with a SmA to Cub phase transition has an undulated layer structure. We discusseffects of the molecular structure on the appearance of the columnar and cubic phases of the novel liquidcrystal oligomers.