| 摘要 |
2'-fluoro-4''-trans-cyclohexyl-terphenyl derivatives represented by the general formula: <IMAGE> wherein the cyclohexyl is the trans isomer, R is a straight chain alkyl having from 1 to 12 carbon atoms, X is a straight chain alkyl having from 1 to 12 carbon atoms, a straight chain alkoxy having from 1 to 12 carbon atoms or -CN and the compounds exhibit the nematic phase. The fluoro-cyclohexyl-terphenyl derivatives have a low crystal-nematic phase transition temperature (C-N point), a high nematic phase-isotropic liquid phase transition temperature (N-I point) and low viscosity and may be included in liquid crystal compositions for improved display devices having a wide temperature range, a low driving voltage and a rapid response speed.
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