Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6235
Title: Possible influence of layer deformation and Chiral segregation on dielectric modes in the dark conglomerate liquid crystal
Authors: Deepa, G.B.
Radhika, S.
Sadashiva, B.K.
Pratibha, R.
Issue Date: 16-Mar-2015
Publisher: Wiley-VCH
Citation: ChemPhysChem, 2015, Vol. 16, p825-832
Abstract: Dielectric spectroscopy is used to investigate the structure, molecular dynamics, and relaxation phenomena in electric-field-induced switchable dark conglomerate (DC) phases in a bent-core liquid crystal. The DC phases are obtained by applying a high-frequency ac electric field in the B1rev phase or by cooling under a dc or an ac field from the isotropic phase. Although the DC phases exhibit good electro-optic switching properties, the dielectric parameters are different from those observed in typical lamellar SmCP phases and similar to those obtained in a non-switchable DC phase. We therefore propose that the dielectric response and reduced intensity of the relaxation modes may be a general feature in DC phases and may owe its origin to the deformed layer structure in which certain molecular motions are impeded. Further, we find that in the field-induced DC phases derived from the isotropic phase, the dielectric modes are affected by chiral segregation promoted by the applied field.
Description: Restricted Access.
URI: http://hdl.handle.net/2289/6235
ISSN: 1439-4235
1439-7641(Online)
Alternative Location: http://dx.doi.org/10.1002/cphc.201402714
Copyright: 2015 Wiley-VCH
Appears in Collections:Research Papers (SCM)

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