Novel chiral swallow-tailed amide liquid crystals possessing antiferroelectricity |
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| Authors: | S-l Wu F-d Chen |
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| Institution: | Department of Chemical Engineering Tatung University 40 Chungshan N Rd., 3rd Sec. Taipei 104 Taiwan ROC |
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| Abstract: | Novel chiral swallow-tailed amide materials, N,N-dipropyl-(S)-2-{6-4-(4-alkoxyphenyl)benzoyloxy]-2-naphthyl}propionamides, DPmPBNPA (m=9-13), have been designed and synthesized for the investigation of mesomorphic properties. The materials DPmPBNPA (m=9-11) display a monotropic phase sequence of I-SmA*-SmCA*-Cr. The antiferroelectric SmCA* phase for the materials was characterized by microscopic texture, switching behaviour, dielectric permitivity and electro-optical response. The measured maximum P s values in the SmCA* phase of the materials are in the range 80–87 nC cm-2. |
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