V-shaped switching in ferroelectric liquid crystal mixtures induced by an achiral swallow-tailed material |
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Authors: | S-L Wu C-Y Lin |
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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: | A new ferroelectric liquid crystal, 1-ethylpropyl (S)-2-2-fluoro-4-(4′-decyloxybiphenylcarbonyloxy) benzoyloxy] propanoate, F, was synthesized and mixed with an achiral swallow-tailed material, 2-propylpentyl 4-(4′-nonyloxybiphenyl-4-carbonyloxy) benzoate,P, for the preparation of binary mixtures for the study. The binary mixtures gave a phase sequence SmA* -SmC* -SmX*. The electro-optic response of the mixtures in the ferroelectric SmC* phase was investigated. V-shaped switching was observed as the amount of the achiral swallow-tailed material became greater than 20 wt %. This result suggests that thresholdless, V-shaped switching in ferroelectric liquid crystal mixtures can be achieved by mixing a ferroelectric liquid crystal with an achiral swallow-tailed compound. |
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Keywords: | discotic mesogen NMR model compound conformation |
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