Preparations and Properties of Isothiocyanate Fluorinated Liquid Crystal Materials with Two Benzene Rings

Two kinds of isothiocyanate(NCS)fluorinated LC materials with two benzene rings were prepared.The melting point andΔn of the NCS LC materials decreased along with the increase of fluorin number,theΔnof the LC with two fluorin atoms is only 0.20.The NCS LC material with one fluorin could enhance the response performance by response time test when the commercial LC was mixed with this material.These data indicated that the NCS LC synthesized have high birefringence,low melting point and fast response properties,and would have some application potential in liquid crystal modulator of adaptive optics.