Dependence of liquid crystallinity on molecular rigidity |
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Authors: | P K Rakhasia |
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Institution: | Department of Chemistry, Saurashtra University, Rajkot, Gujarat, India |
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Abstract: | A novel homologous series of liquid crystals (LC) of chalconyl derivatives is synthesized and studied with a view to understanding and establishing the effects of molecular structure on liquid crystal properties. The novel series consists of 12 homologues. Nematogenic LC property commences from C3 and continues up to C14 and the smectogenic mesophase is exhibited from C4 to C16. The C3 homologue is a monotropic nematic and the rest of the homologues are enantiotropically smectic and nematic or only smectic (C16). Transition curves Cr-Sm, Sm-N, Cr-I, and N-I behave in normal manner with exhibition of odd-even effect, showing phase behaviors of the series. |
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Keywords: | Enantiotropic liquid crystal nematic smectic thermotropic |
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