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Study of novel liquid crystals of ethylene derivatives: ├?┬▒-4-[4├ó┬?┬?-n-alkoxy cinnamoyloxy] phenyl ├?┬▓-4├ó┬?┬Ł-methoxy benzoyl ethylenes | Abstract

Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry

ISSN: 0975-413X

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Abstract

Study of novel liquid crystals of ethylene derivatives: ├?┬▒-4-[4├ó┬?┬?-n-alkoxy cinnamoyloxy] phenyl ├?┬▓-4├ó┬?┬Ł-methoxy benzoyl ethylenes

Author(s): Chauhan H. N., Doshi A.V.

Titled homologous series consists of eleven homologues. Methyl to n-butyl and hexadecyl derivatives are nonliquid crystal while rest of the homologes Viz. n-pentyl to n-tetradecyl derivatives are only enantiotropic nematogenic without exhibition of any smectic character. Odd even effect is observed in nematic-isotropic transition curve. A phase diagram shows that Solid-isotropic or nematic transition curve follows.zigzag path of rising and falling. Nematic-isotropic transition curve behaves in normal manner. Analytical data support the structures of molecules. Texture of nematic mesophase is schlierens or threaded type. Transition and melting temperatures of homologues are determined from hot stage polarising microscope. Liquid Crystal (LC) properties of the series are compared with other structurally similar homologous series. Series is entirly nematogenic with relatively high melting type.


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