| 摘要 |
The invention relates to a liquid crystal substance having a high dielectric property, a high spontaneous polarization and a wide liquid crystal temperature range. The substance is expressed by the following formula, where R is C2-C10 alkyl, X is halogen or hydrogen. The liquid crystal display element produced with the substance has a rapid response speed in according with the liquid crystal substance characteristic of high dielectric property and spontaneous polarization and low viscosity.
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