Publisher： Taylor & Francis Ltd
ISSN： 0267-8292
Source： Liquid Crystals, Vol.32, Iss.6, 2005-06, pp. : 749-754
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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, EP m PPB ( m ?=?812), 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 ?=?810) 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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