Nematogenic and smectogenic liquid crystals from new heterocyclic isoflavone derivatives:Synthesis,characterization and X-ray diffraction studies |
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Authors: | Wan Sinn Yam Guan Yeow Yeap Liquid Crystal Research Laboratory School of Chemical Sciences Universiti Sains Malaysia Minden Malaysia |
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Institution: | Liquid Crystal Research Laboratory, School of Chemical Sciences, Universiti Sains Malaysia, Minden 11800, Malaysia |
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Abstract: | A new series of liquid crystals comprising of eight heterocyclic isoflavone esters, 7-alkanoyloxy-3-4′-(3-methylbutyloxyphenyl)]-4H-1-benzopyran-4-ones exhibiting enantiotropic nematic (N) and smectic C (SmC) phases were synthesized and investigated. The mesomorphic properties of all derivatives were investigated by means of differential calorimetry and polarized optical microscopy. Wide angle X-ray diffraction technique was employed to investigate the molecular packing associated with the intermolecular interaction as well as the correlation between the thermal behaviour of these compounds with their anisotropy properties within a mesophase. |
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Keywords: | Heterocyclic Isoflavone Enantiotropic Mesophase |
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