Polyfluorinated fused aromatics and their use in liquid-crystal mixtures

摘要

A compound of the formula (I) is described where R¹ and R² are defined in the specification and p=q=r= 0 or 1 with p+q+r<> 0 . The compound of formula (I) has high dielectric anisotropy, thermally stable, fast response time and high voltage holding ratio, which is used as a liquid crystal medium for the liquid-crystal displays such as ECB, in-plane-switching (IPS) and VA display mode.