'SYNTHESIS AND MESOMORPHIC PROPERTIES OF NEWLY IMIDAZOLIUM IONIC LCS BASED ON CHALCONE LINKING GROUP'

A newly imidazolium linked chalcone ionic LCs (5a-5f) based on two phenyl rings have been synthesized by the quaternization of 1-methylimidaazole and 3,4,-dialkoxy substituted chalcone derivatives. The mesomorphic properties of these compounds were observed by optical polarized light microscopy (POM) and confirmed by differential scanning calorimetry (DSC) analysis. All synthesized compounds exhibited mesogenic properties on heating and cooling condition. Thermal stability of smectic and nematic phase of present ILCs are higher as compared to series-1. Their chemical structures were identified by using 1H NMR and IR spectroscopy.