Synthesis and Characterization of Mesomorphic Behaviour of New Mesogenic Compounds Incorporating Cholesteryl Ester Moiety Connected to 1,3,4-Oxadiazole

The synthesis and characterization of new series of liquid crystals containing cholesteryl moiety connected via an ester linkage to 1,3,4-oxadiazole are reported. The molecular structures of the intermediates and target compounds were confirmed by elemental analyses and FT-IR, H NMR and mass spectrometry. The mesomorphic behaviors were investigated by polarizing optical microscopy (POM) attached with hot stage and differential scanning calorimetry (DSC). Enantiotropic smectic 1, smectic A, blue phase and cholesteric mesophases are exhibited by the newly synthesized compounds.