Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/3959
Title: | Occurrence of a transition between two polar orthogonal smectic phases in a new homologous series of novel bent-core compounds |
Authors: | Radhika, S. Sadashiva, B.K. Pratibha, R. |
Keywords: | bent-core biphenyl moiety polar uniaxial smectic A polar biaxial smectic A |
Issue Date: | Apr-2010 |
Publisher: | Taylor & Francis |
Citation: | Liquid Crystals, 2010, Vol.37, p417 |
Abstract: | Two new homologous series of isomeric achiral five-ring bent-core compounds containing 3,4-disubstituted biphenyl moiety have been synthesised and the mesophases that they exhibit characterised. Compounds of series A are obtained from 4-hydroxybiphenyl-3-carboxylic acid while those in series B are prepared by reversing the position of the hydroxyl and carboxylic groups. This change seems to have a profound effect on the mesophase properties. Interestingly, for compounds of series A containing the long terminal chain, a transition between two polar orthogonal smectic phases has been observed. The observed mesophases have been characterised using a combination of polarised light optical microscopy, differential scanning calorimetry, X-ray diffraction studies and electro-optical measurements. This is the first example of a transition between two partial bilayer polar orthogonal smectic phases. In addition, the effect of a fluoro substituent ortho to the strongly polar terminal cyano group on the mesophase has also been examined. |
Description: | Restricted Access. |
URI: | http://hdl.handle.net/2289/3959 |
ISSN: | 1366-5855-(Online) 0267-8292 |
Alternative Location: | http://dx.doi.org/10.1080/02678291003632645 |
Copyright: | 2010 Taylor & Francis |
Appears in Collections: | Research Papers (SCM) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
2010_Liquid Crystals_V37_p417.pdf Restricted Access | Restricted Access | 2.88 MB | Adobe PDF | View/Open Request a copy |
Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.