Ion-conductive liquid crystals: Formation of stable smectic semi-bilayers by the introduction of perfluoroalkyl moieties

Koji Hoshino, Kiyoshi Kanie, Toshihiro Ohtake, Tomohiro Mukai, Masahiro Yoshizawa, Seiji Ujiie, Hiroyuki Ohno, Takashi Kato

研究成果: Article査読

28 被引用数 (Scopus)

抄録

Liquid-crystalline compounds 1 and 3 having perfluoroalkyl-terminated mesogens at both ends of poly(ethylene oxide) chains have been prepared. These compounds show smectic A (SA) and C phases over 100°C. The SA-Iso (isotropic) transition temperatures are higher by about 70°C than those of the corresponding alkyl-substituted compounds 2 and 4. The incorporation of lithium triflate into 1 and 3 widens the temperature ranges of the SA phases for the resulting complexes. The complexes of 1 and 3 containing 50 mol-% of lithium triflate exhibit columnar phases. The ionic conductivities of the homotropically aligned complexes based on 1 along the direction perpendicular to the molecular director of the SA phases are higher than those of the corresponding compound of 2. The increase of the ionic conductivities as well as the stabilization of the smectic phases for these perfluoroalkyl-terminated compounds may be due to the formation of more stabilized layered structures through the intermolecular interactions among the perfluoroalkyl moieties.

本文言語English
ページ(範囲)1547-1555
ページ数9
ジャーナルMacromolecular Chemistry and Physics
203
10-11
DOI
出版ステータスPublished - 2002 7月 29
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 物理化学および理論化学
  • ポリマーおよびプラスチック
  • 有機化学
  • 材料化学

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