BIPHENYL ESTER BASED LIQUID CRYSTAL COMPOUND OF THIENYLCARBOXYLIC ACID AND THIOPHENECARBOXYLIC ACID, LIQUID CRYSTAL COMPOSITION AND PRODUCTION THEREOF

摘要

NEW MATERIAL:A liquid crystal compound expressed by formula I (R is 2-14C straight-chain alkyl; n is 1 or 0; X is cyano or Br). EXAMPLE:4'-Cyano-4-biphenylyl 5-n-propyl-2-thienylacrylate and 4'-cyano-4- biphenylyl 5-n-propyl-2-thiophenecarboxylate. USE:A liquid crystal composition having a wide liquid crystal temperature range. PREPARATION:For example, a compound expressed by formula II is reacted with a compound expressed by formula III in the presence of a dehydrating agent to afford the aimed compound expressed by formula I.