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Title: A polar biaxial smectic A phase in new unsymmetrical compounds composed of bent-core molecules
Authors: Shreenivasa Murthy, H.N.
Sadashiva, B.K.
Issue Date: Apr-2004
Publisher: Taylor & Francis
Citation: Liquid Crystals, 2004, Vol.31, p567 - 578
Abstract: The synthesis and liquid crystalline properties of several new compounds unsymmetrically substituted about two different central phenyl rings are reported. All the compounds contain a strongly polar terminal cyano/nitro substituent. Some of the nitro-substituted compounds derived from 3-hydroxybenzoic acid show a transition from the partial bilayer uniaxial smectic A (SmAd) phase to a polar partial bilayer biaxial smectic A (SmAdPA) phase. The analogous cyano-substituted derivatives exhibit only a SmAd phase. However, compounds containing a 4-cyanobiphenyl moiety in the terminal position and derived from 1,3-dihydroxybenzene show the SmAd - SmAdPA transition. The mesophases were characterized using polarizing optical microscopy, differential scanning calorimetry, X-ray diffraction studies, conoscopic examination and miscibility studies.
Description: Restricted Access.
ISSN: 0267-8292
1366-5855 (Online)
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Copyright: 2004 Taylor & Francis
Appears in Collections:Research Papers (SCM)

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