한국정보디스플레이학회:학술대회논문집

한국정보디스플레이학회 (The Korean Infomation Display Society)
권호 표지

Polar Smectic Phases of Bent-Core Liquid Crystals with Vinyl End Groups

  • Lee, Chong-Kwang (Dept. of Chemistry, Gyeongsang National University) ;
  • Kwon, Soon-Sik (Dept. of Chemistry, Gyeongsang National University) ;
  • Kim, Tae-Sung (Dept. of Chemistry, Gyeongsang National University) ;
  • Shin, Sung-Tae (Dept. of Physics, Korea University) ;
  • Oh, Lee-Tack (Dept. of Physics, Korea University) ;
  • Choi, E-Joon (Dept. of Polymer Science and Engineering, Kumoh National University of Technology) ;
  • Zin, Wang-Choel (Dept. of Materials science and Engineering, Pohang University of Science and Technology) ;
  • Chien, Liang-Chy (Liquid Crystal Institute, Kent State University)
  • 발행 : 2002.08.21
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

New banana-shaped achiral compounds, 1,3-phenylene bis [4-{4-(7-octenyloxy)phenyliminomethyl}benzoate](PBOEB), 1,3-phenylene bis [4-{3-fluoro-4-(7-octenyloxy)phenyliminomethyl}benzoate] (PBFOEB), 1,3-phenylene bis [4-{4-(10-undecyloxy)phenyliminomethyl}benzoate](PBEUB), and 1,3phenylene bis [4-{3-fluoro-4-(10-undecyloxy)phenyliminomethyl}benzoate](PBFEUB) were obtained by general synthetic methods. PBOEB and PBFOEB having the octenyloxy groups such as $-(CH_2)_6CH=CH_2$ showed ferroelectric switching, and their values of spontaneous polarization on reversal of an applied electric field were 120 nC/$cm^2$ and 225 nC/$cm^2$, respectively. PBEUB and PBFEUB having the undecyloxy groups such as $-{CH_2)_9CH=CH_2$ showed antiferroelectric switching, and their values of spontaneous polarization on reversal of an applied electric field were 120 nC/$cm^2$ and 140 nC/$cm^2$, respectively. We could obtain ferroelectric and antiferroelectric phases by controlling the number of carbon atom in alkenyloxy chains of bent-core molecules.

키워드