Liquid crystal composition containing fluorinated phenylpyrimidines with SmC phase and fluorinated terphenyl(s), and use thereof in a liquid crystal shutter

摘要

A liquid crystal composition comprises more than 10 % by weight of a mixture of fluorinated phenylpyrimidine compounds capable of exhibiting an SmC phase (eg compounds of formula I), and a greater than 5 % by weight of at least one fluorinated terphenyl compound which enhances the phase sequence of said mixture (eg compounds of formulae II-V). A liquid crystal shutter is disclosed which comprises the above composition. Compounds of formula I have the following structure:- wherein X1 and X2 are independently selected from the group consisting of (C1-C12)alkyl and (C1-C12)alkoxy. Compounds of formulae II-V have the structures:- where X1 and X2 are as defined above.