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Issue 3, 2004
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Direct transition from a nematic phase to a polar biaxial smectic A phase in a homologous series of unsymmetrically substituted bent-core compounds

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Abstract

The synthesis and characterization of twenty seven new compounds belonging to three homologous series of compounds derived from 3-hydroxybenzoic acid are reported. One of the terminal positions of the constituent molecules of these compounds is substituted with a strongly polar cyano group while the other end contains an n-alkyl chain attached to a biphenyl moiety. Twenty two of these compounds show the polar partial bilayer biaxial smectic A phase which is antiferroelectric in nature. In addition, a direct transition from the nematic phase to the polar partial bilayer biaxial smectic A phase which has not been seen before is also reported. The mesophases have been characterized using polarized light optical microscopy, differential scanning calorimetry, X-ray diffraction studies and electro-optical experiments.

Graphical abstract: Direct transition from a nematic phase to a polar biaxial smectic A phase in a homologous series of unsymmetrically substituted bent-core compounds

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Publication details

The article was received on 04 Aug 2003, accepted on 13 Nov 2003 and first published on 19 Dec 2003


Article type: Paper
DOI: 10.1039/B309262C
Citation: J. Mater. Chem., 2004,14, 310-319
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    Direct transition from a nematic phase to a polar biaxial smectic A phase in a homologous series of unsymmetrically substituted bent-core compounds

    R. A. Reddy and B. K. Sadashiva, J. Mater. Chem., 2004, 14, 310
    DOI: 10.1039/B309262C

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