한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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Synthesis and Mesomorphic Properties of Banana-Shaped Mesogens with All-Ester Linking Group

  • Choi, E-Joon (Dept. of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Cui, Xin (Dept. of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Zin, Wang-Choel (Dept. of Materials Science and Engineering, Pohang Univ. of Science and Technology) ;
  • Ohk, Chang-Woo (Dept. of Materials Science and Engineering, Pohang Univ. of Science and Technology) ;
  • Lim, Tong-Kun (Dept. of Physics, Korea Univ.) ;
  • Lee, Ji-Hoon (Dept. of Physics, Korea Univ.) ;
  • Kim, Young-Chul (Dept. of Chemical Engineering, Kyung Hee Univ.) ;
  • Paek, Sang-Hyon (Dept. of Chemical Engineering, Kyung Hee Univ.)
  • Published : 2007.08.27
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Abstract

Four banana-shaped compounds have beene synthesized introducing ester linking group into mesogenic unit, varying the central core with 1,6-, 1,7-, 2,3-, and 2,7-naphthylene units, and introducing the dodecyloxy group as the terminal flexible unit. All obtained compounds except one with 1,7-naphthylene unit were reversibly thermotropically liquid crystalline. The compound with 1,7-naphthylene unit could not form the mesophase due to its asymmetrical and sharp substitution angle. The compounds with 1,6- and 2,3-naphthylene units showed an antiferroelectric switchable smectic phase, which has been designated B2 phase. Interestingly, the compound with the 2,3-naphthylene unit showed the two mesophases of B2 and nematic phase.

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