A Synthesis and Mesophase behaviour of Homologous Series: (4’-n-alkoxy Benzoyloxy) 1-(4-(4-hydroxy 3- methoxy benzylidene) amino) phenyl ) ehane-1-one

ABSTRACT

A new homologous series (4’-n-alkoxy Benzoyloxy) 1-(4-(4-hydroxy 3- methoxy benzylidene) amino) phenyl ) ehane-1-one is synthesized with a view to understand and establish the relation between mesogenic properties and structure of molecules. Ethyl to hexadecyl, all twelve homologues are enantiotropically nematogenic. None of the homologues exhibit a smectogenic mesophase. An odd–even effect is observed in the transition curve. The average thermal stability is 281.25°C and the nematogenic mesophase ranges from 42.0°C to 248.25°C. Thus, the series is of a middle ordered melting type with moderate nematogenic range. Analytical data confirm the structure of the compounds, and the mesomorphism was identified by optical microscopy. The mesogenic properties are compared with structurally similar compounds.

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WSN 204 (2025) 80-90

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