Liquid crystal compounds containing trans-decalin were recently developed,which show perfect performance for TFT driving.Compounds 1～13 were synthesized via reaction of 1-(2'-alkyl-6'-trans-decalinyl)-4-cyclohexanone with Grignard reagent,dehydration,reduction and transformation.The total yields waved from 22.8% to 71.10%.Structure of the compound has been identified by IR,¹H NMR,¹³C NMR and MS respectively.Their phase transition data were measured by DSC,and thereby the thermal behavior in mixed liquid crystal was also discussed.

Key words: liquid crystal mixture, trans-decalin, clearing point, melting point, melting entropy