Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Synthesis and Mesomorphic Properties of New Swallow-tailed Liquid Crystals Derived from 1,3-Dialkoxy-2-propanols

  • Kang, Kyung-Tae (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University) ;
  • Lee, Seng-Kue (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University) ;
  • Park, Chang-Won (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University) ;
  • Cho, Sang-Hui (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University) ;
  • Lee, Jong-Gun (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University) ;
  • Choi, Soon-Kyu (Department of Chemistry, Dong-A University) ;
  • Kim, Yong-Bae (Liquid Crystal Research Center and Department of Chemistry, Konkuk University)
  • Published : 2006.09.20
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Abstract

New liquid-crystalline biphenyl carboxylates with an achiral swallow-tail derived from 1,3-dialkoxy-2-propanol $[(ROCH_2)_2CHOH$] where R is methyl, ethyl, propyl, butyl, $CH_2CF_3$, and $CH_2CF_2CF_3$ were prepared. These achiral liquid crystals having 1,3-dialkoxy-2-propyl moieties exhibit diverse phase sequences [I-SmA-(SmC)-(SmCalt)-Cr] depending on the substituent R group of the swallow-tail. The compounds carrying a fluorinated swallow-tail exhibit antiferroelectric-like smectic C phases, and their temperature ranges are broader than the corresponding non-fluorinated swallow-tailed ones.

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