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

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.

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