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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2904

Title: Unusual mesomorphic behaviour in bent-core compounds derived from 5-cyanoresorcinol
Authors: Reddy, Amaranatha R.
Sadashiva, B.K.
Issue Date: Aug-2004
Publisher: Taylor & Francis
Citation: Liquid Crystals, 2004, Vol.31, p1069 - 1081
Abstract: We describe the synthesis and mesomorphic properties of the first two homologous series of bent-core compounds derived from 5-cyanoresorcinol. The lower homologues in both series show a normal B1 phase, and the mesophase of higher homologues exhibits very unusual textures and electro-optical switching behaviour. The observation of spiral growth patterns under a polarizing microscope, and only layer reflections from X-ray diffraction studies for these homologues, suggests that this mesophase is different from a B2 phase. This mesophase shows chiral domains of opposite handedness which can be identified from electric field experiments. Under a triangular-wave electric field, at lower voltages although the mesophase shows a ferroelectric type switching behaviour it is actually antiferroelectric in nature. The observation of helical structures and spontaneously formed chiral domains suggests that the mesophase is a variant of the B2 phase.
Description: Restricted Access.
URI: http://hdl.handle.net/2289/2904
ISSN: 0267-8292
1366-5855 (Online)
Alternative Location: http://dx.doi.org/10.1080/02678290410001723378
Copyright: 2004 Taylor & Francis
Appears in Collections:Research Papers (SCM)

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