Synthesis and ferroelectric properties of chiral swallow-tailed liquid crystals derived from (S)-2-[1-(2-ethylbutoxy)]propanol |
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Authors: | S -L Wu C -Y Lin |
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Institution: |
a Department of Chemical Engineering, Tatung University, Taipei 104, Taiwan, ROC |
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Abstract: | (S)-2-1-(2-Ethylbutoxy)]propanol was designed and synthesized as a chiral building block for the preparation of chiral liquid crystals. Its derivatives, the (S)-2-1-(2-ethylbutoxy)]propyl 4-4-(4-alkoxyphenyl)phenoyloxy]benzoates, EPmPPB (m?=?8-12), were prepared and their mesomorphic phases investigated. The results showed that the chiral materials displayed enantiotropic SmA* and SmC* phases, while those with shorter alkyl chains (m?=?8-10) displayed an additional unidentified SmX* phase. The switching current, spontaneous polarization, tilt angle, dielectric constant and electro-optical response for the materials in the ferroelectric SmC* phase were measured. The electro-optic responses of the materials in polyimide film-coated, homogeneously aligned cell exhibit thresholdless, V-shaped switching in the ferroelectric phase. |
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