Novel gallic-calixarene liquid crystals: syntheses and conformation influences on mesomorphism

Abstract Three novel gallic-calixarene derivatives 5 , 6 and 7 were prepared in yields of 57–76%. Their structures and conformations were confirmed by element analyses, IR, ESI-MS and NMR spectra. Compounds 5 and 6 with stable cone conformation show liquid crystalline behaviours but compound 7 with no stable conformation exhibits no mesophase. These results indicated that the stable cone conformation plays a crucial role for mesomorphic property.