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Rod-shaped dopants for flexoelectric nematic mixtures

Aziz, Nayyar; Kelly, Stephen M.; Duffy, Warren; Goulding, Mark


Nayyar Aziz

Stephen M. Kelly

Warren Duffy

Mark Goulding


We report the synthesis and liquid crystalline behaviour of two series of para-substituted terphenyls as dopants with a rigid rod-like shape, rather than a wedge-, pear- or banana-shape, for guest-host nematic mixtures with flexoelectric properties. One series of liquid crystalline dopants is of low-to-strongly negative dielectric anisotropy and the other is of low-to-strongly positive dielectric anisotropy. The usefulness of apolar and polar rod-like dopants as components of flexoelectric nematic mixtures of positive dielectric anisotropy for use in LCDs is investigated in general and the dependence of the flexoelectric properties of the doped nematic mixtures on the polarity of the dopants is studied in particular. The correlation between the concentration of the dopant and the magnitude of the flexoelastic ratio of several guest-host nematic mixtures is investigated.


Aziz, N., Kelly, S. M., Duffy, W., & Goulding, M. (2009). Rod-shaped dopants for flexoelectric nematic mixtures. Liquid crystals, 36(5), 503-520.

Journal Article Type Article
Acceptance Date May 8, 2009
Online Publication Date Nov 5, 2010
Publication Date Jul 20, 2009
Print ISSN 0267-8292
Electronic ISSN 1366-5855
Publisher Taylor and Francis
Peer Reviewed Peer Reviewed
Volume 36
Issue 5
Article Number PII 913922141
Pages 503-520
Keywords Polyfluorinated dopants; Flexoelectric nematics; Terphenyls
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