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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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| File | Description | Size | Format | |
|---|---|---|---|---|
| 2015_chemphyschem_16_825.pdf Restricted Access | Restricted Access | 544.29 kB | Adobe PDF | View/Open Request a copy |
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