DSpace
 

RRI Digital Repository >
06. Soft Condensed Matter >
Research Papers (SCM) >

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5097

Title: Structure-property correlation of a hockey stick-shaped compound exhibiting N-SmA-SmCa phase transitions
Authors: Sathyanarayana, P.
Radhika, S.
Sadashiva, B.K.
Dhara, Surajit
Keywords: Core Liquid-Crystals
Nematic Phase
Molecules
Viscosity
Elasticity
Behavior
Systems
Bend
Issue Date: 21-Feb-2012
Publisher: Royal Society of Chemistry
Citation: Soft Matter, 2012, Vol.8, p2322
Abstract: We report the measurement of birefringence, dielectric constant, splay, bend elastic constants and rotational viscosity in the nematic phase (N) of a hockey stick-shaped compound exhibiting smectic-A (SmA) and anticlinic smectic-C (SmCa) phase transitions at lower temperature. It is found that the physical properties are significantly different than calamitics and partially similar to the bent-core liquid crystals. It exhibits the positive dielectric and the negative elastic anisotropy. The optical and the thermal measurements show that all the transitions are first order. The rotational viscosity is comparatively higher than calamitic liquid crystals and exhibits weak pre-transitional divergence. The temperature dependent static dielectric measurements indicate antiparallel correlation of both the longitudinal and the transverse components of dipole moments in both the smectic phases. The parallel component of the dielectric constant exhibits a single Debye type relaxation in all the phases. The activation energy in the N, SmA and SmCa phases are comparatively larger than that of the respective phases of calamitic liquid crystals and can partially be attributed to the higher rotational viscosity of the hockey stick-shaped compound.
Description: Restricted Access.
URI: http://hdl.handle.net/2289/5097
ISSN: 1744-683X
1744-6848 (Online)
Alternative Location: http://adsabs.harvard.edu/abs/2012SMat....8.2322S
http://dx.doi.org/10.1039/c2sm06767f
Copyright: 2012 Royal Society of Chemistry
Appears in Collections:Research Papers (SCM)

Files in This Item:

File Description SizeFormat
2012_SM_8_2322.pdfRestricted Access1.38 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

    RRI Library DSpace