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Synthesis, characterisation and liquid-crystalline phase transition studies on two higher homologues of 4O.m (m=14 and 16) series

Published online by Cambridge University Press:  15 March 2011

C. Rama Chandra Prabhu  and
V.G.K.M. Pisipati
C. Rama Chandra Prabhu
Affiliation:
Faculty of Physics, RVR & JC College of Engineering, Chandramoulipuram, Chowdavaram, Guntur- 522 019, India
V.G.K.M. Pisipati
Affiliation:
Centre for Liquid Crystals Research and Education, Faculty of Physical Sciences, Nagarjuna University, Nagarjuna Nagar-522 510, India
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Abstract

The synthesis, characterization and phase transition studies of higher homologues of N(p-nbutoxybenzylidene)p-n-alkylanilines, Viz., 4O.m series (m=14 and 16) are carried out by thermal microscopy, differential scanning calorimetry and density. The compounds exhibit a phase variant of nematic and smectic-A. Density studies reveal a first order nature of IN transitions and a weak first order NA transitions. An estimate of pressure dependence of the phase transition temperatures using the volume and enthalpy data are presented. A comparison of these results with other reported results in nO.m and other compounds are presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 709: Symposium CC – Advances in Liquid Crystalline Materials and Technologies , 2001 , CC5.33.1
Copyright
Copyright © Materials Research Society 2002

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