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Issue 10, 2011
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Randomly polarised smectic A phase exhibited by bent-core molecules: experimental and theoretical studies

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Abstract

We report experimental studies on a newly synthesised bent-core liquid crystal exhibiting partial bilayer SmAdPR and SmAdPA phases. Though the SmAdPR phase appears to be optically uniaxial as that of the SmA phase, the observed distinctive properties of the SmAdPR phase are (a) a current peak associated with a polarisation reorientation process under the application of a triangular wave voltage, (b) large variation of the effective birefringence of the planarly oriented sample with the applied in-plane electric field and (c) the presence of a strong dielectric mode. We have developed a simple theoretical model to describe the observed properties of the SmAPR phase and the transition from the SmAPR to the SmAPA phase. We propose that the above characteristic properties of the SmAPR phase arise due to the strong coupling between the transverse polarisation and the transverse polar order of the bend directions of the bent-core molecules in the layers.

Graphical abstract: Randomly polarised smectic A phase exhibited by bent-core molecules: experimental and theoretical studies

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Publication details

The article was received on 02 Feb 2011, accepted on 10 Mar 2011 and first published on 07 Apr 2011


Article type: Paper
DOI: 10.1039/C1SM05185G
Citation: Soft Matter, 2011,7, 4735-4741
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    Randomly polarised smectic A phase exhibited by bent-core molecules: experimental and theoretical studies

    M. Gupta, S. Datta, S. Radhika, B. K. Sadashiva and A. Roy, Soft Matter, 2011, 7, 4735
    DOI: 10.1039/C1SM05185G

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