Chiral two ring compounds exhibiting antiferroelectric phases |
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Authors: | T Fü tterer G Heppke D L tzsch D Moro J W Goodby R P Tuffin |
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Institution: | T. Fü,tterer ,G. Heppke,D. Lö,tzsch,D. Moro,J. W. Goodby,R. P. Tuffin |
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Abstract: | Novel chiral two ring compounds possessing phenylethenoate moieties were synthesized and their liquid crystalline properties determined. Some of these compounds were found to exhibit SmC* γ, AF and SmC* A phases, whereas in other compounds only SmA* and SmC* phases appear. The influence of the molecular structure on the appearance of SmC* γ, AF and SmC* γ phases is discussed. The basic electro-optical properties of the homologous series of ( S )-( E )4-(1-methylheptyloxycarbonyl)phenyl 4-alkoxycinnamates, in which SmC*, SmC* γ, AF and SmC* A phases appear, were also investigated. High values of spontaneous polarization, low threshold voltages and fast switching times at room temperature were observed. |
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