Role of molecular dipoles in liquid crystals

Madhusudana, N.V.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2102

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DC Field	Value	Language
dc.contributor.author	Madhusudana, N.V.	-
dc.date.accessioned	2007-02-08T08:36:18Z	-
dc.date.available	2007-02-08T08:36:18Z	-
dc.date.issued	2004	-
dc.identifier.citation	Molecular Crystals and Liquid Crystals, 2004, Vol.409, p371-387	en
dc.identifier.issn	1542-1406	-
dc.identifier.issn	1563-5287 (Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/2102	-
dc.description	Restricted Access	en
dc.description.abstract	A vast majority of compounds exhibiting liquid crystalline phases have polar molecules. The nematic director is apolar, even when the molecules have cyano or nitro end-groups, as neighbouring molecules tend to have an antiparallel short-range order. This leads to a partial bilayer structure in the smectic A phase of rod-like molecules as also many interesting phase transitions. The latter can be understood on the basis of a change over to a polar short-range order as the density of the medium is increased. If the molecules have bent-cores and cyano end-groups, a partial bilayer biaxial smectic A phase is also found, implying the formation of quartets with an apolar structure. Lateral dipolar components lead to a tilting of molecules in smectic phases. This can be understood on the basis of the off-axis locations of such dipoles. A mean field theory of smectic C liquid crystals based on this mechanism gives results which reflect experimental trends. In appropriate cases, the possibility of occurrence of a cone-phase consisting of double-tilt cylinders is also pointed out.	en
dc.format.extent	148775 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	Taylor & Francis	en
dc.relation.uri	http://dx.doi.org/10.1080/15421400490433721	en
dc.rights	2004 Taylor & Francis	en
dc.subject	antiparallel short-range order,	en
dc.subject	biaxial smectic A phase	en
dc.subject	cone phase	en
dc.subject	polar molecules	en
dc.subject	polar short-range order	en
dc.subject	smectic C liquid crystals	en
dc.title	Role of molecular dipoles in liquid crystals	en
dc.type	Article	en
Appears in Collections:	Research Papers (SCM)

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