Role of Position of Oxygen on Benzylidene Anilines: The Effect of End Chain

Abstract

A family of benzylidene aniline compounds with variable end chains (for n = 1, 2, 4, 8 and m = 16) are synthesized by placing the electro-negative oxygen atom on either side of the rigid core (nO.m, n.Om), on both sides of the rigid core (nO.Om) and with the absence of oxygen on rigid core moiety (n.m). The mesomorphic properties are studied by using Thermal Microscopy (TM) and Differential Scanning Calorimetry (DSC). The depression/elevation of melting/clearing temperature and the nature of liquid crystallinity are presented as a function of position of oxygen with end chains.

Keywords:

• benzylidene anilines
• mesomorphic properties

ACKNOWLEDGMENT

The financial support rendered by the Council of Scientific & Industrial Research, New Delhi, India is gratefully acknowledged.

Notes

Blank space refers the phases are to be identified.

The phases given in parentheses are the phases observed in nO.m compounds.

Blank space refers the phases are to be identified.

The phases reported in parentheses are the phases observed in nO.m compounds.

Blank space refers the phases to be identified.

The phases reported in parentheses are the phases observed in nO.m compounds.