On the polymorphism of the smectic A phases of highly polar compounds

Madhusudana, N.V.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1057

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DC Field	Value	Language
dc.contributor.author	Madhusudana, N.V.	-
dc.date.accessioned	2006-01-03T05:01:26Z	-
dc.date.available	2006-01-03T05:01:26Z	-
dc.date.issued	1983-10	-
dc.identifier.citation	Proceedings of the Indian Academy of Sciences (Chemical Sciences), 1983, Vol. 92, p509 -525.	en
dc.identifier.issn	0253-4134	-
dc.identifier.uri	http://hdl.handle.net/2289/1057	-
dc.description.abstract	The smectic A phase is characterized by a layered arrangement of rod-like molecules, with the average orientation of the molecules normal to the layers and a liquid-like organization within the layers. When the molecules have a strongly polar end group (like C=N, -NO2 etc.,), neighbouring molecules prefer an antiparallel orientation. This results in a bilayer structure, with a layer spacing much larger than the molecular length. In many compounds, the structure of the bilayer is sensitive to temperature (or pressure). This results in some interesting phenomena: (a) reentrant phases, as for example, the appearance of a nematic phase below the temperature range of existence of the A phase; (b) a number of polymorphic forms of smectic A; and (c) an 'induced smectic A' phase when the compounds with the highly polar terminal groups are mixed with weakly polar compounds even when neither compound by itself exhibits the A phase. This article gives a brief summary of recent results on all these aspects.	en
dc.format.extent	775632 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	Indian Academy of Sciences, Bangalore, India.	en
dc.rights	Indian Academy of Sciences, Bangalore, India.	en
dc.subject	Smectic A	en
dc.subject	Polymorphism	en
dc.subject	Reentrant phases	en
dc.subject	Bilayer Smectics	en
dc.subject	Induced Smectic Phases	en
dc.title	On the polymorphism of the smectic A phases of highly polar compounds	en
dc.type	Article	en
Appears in Collections:	Research Papers (SCM)

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