A polar biaxial smectic A phase in new unsymmetrical compounds composed of bent-core molecules

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2908

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.
URI:	http://hdl.handle.net/2289/2908
ISSN:	0267-8292 1366-5855 (Online)
Alternative Location:	http://dx.doi.org/10.1080/02678290410001666093
Copyright:	2004 Taylor & Francis
Appears in Collections:	Research Papers (SCM)

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