Influence of Oxygen on Phase Behavior of N(p-n-Octyloxy Benzylidene) p-n-Alkoxy Anilines: A Comparative Study

Abstract

The N (p-n-octyloxy benzylidene) p-n-alkoxy anilines (8O.Om) compounds were synthesized, and the mesomorphic properties were characterized by using thermal microscopy (TM) and differential scanning calorimetry (DSC) for m = 3 to 7. The nematic (N), smectic-C (S_C), and smectic-G (S_G) phases are the more commonly observed in these compounds. The smectic-A (S_A) and smectic-B (S_B) phases are observed only in the 8O.O5 compound. The influence of oxygen on phase behavior of the 8O.Om compounds is compared with the data available on nO.m compounds.

Keywords:

• benzylidene aniline compounds
• mesomorphic properties
• phase behavior

ACKNOWLEDGMENTS

The financial support rendered by the CSIR, DST, UGC, New Delhi and DAE–BRNS, Mumbai, India, is gratefully acknowledged.