| 摘要 |
<p>Liquid crystal medium comprising p-quaterphenyl derivatives (I) is new. Liquid crystal medium comprising p-quaterphenyl derivatives of formula (I) is new. R 1>, R 2> : optionally halogenated 1-15C alkyl or alkoxy, optionally with CH 2 groups replaced by ethynylene, CF 2O, CH=CH, 1,3-cyclobutylene, 2,5-spiro[3.3]cycloheptylene, O, COO or OCO; X 1>-X 12> : H or F, at least one being F. An independent claim is also included for an electrooptic liquid crystal display comprising a liquid crystal medium as above. [Image].</p> |
