Dipolar origin of tilting of rod-like molecules in the smectic C phase

Madhusudana, N.V.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6367

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DC Field	Value	Language
dc.contributor.author	Madhusudana, N.V.	-
dc.date.accessioned	2015-12-26T13:16:21Z	-
dc.date.available	2015-12-26T13:16:21Z	-
dc.date.issued	2015-08	-
dc.identifier.citation	Liquid Crystals, 2015, Vol. 42, p 840-863 (Invited Article)	en_US
dc.identifier.issn	0267-8292	-
dc.identifier.issn	1366-5855 (Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/6367	-
dc.description	Restricted Access.	en_US
dc.description.abstract	We review various proposed molecular mechanisms for tilting of rod-like molecules in the smectic C phase. We analyse some experimental results, viz. (1) unusual odd–even effects in smectic A to nematic (TAN) and smectic A to smectic C (TAC) transition temperatures and/or maxima in TAC in some homologous series of compounds, (2) occurrence of re-entrant SmA and/or hexatic SmB as lower temperature phases, (3) SmC replaced by SmA when a halogen atom is substituted at the end of one of the chains, (4) suppression of SmC phase at high pressures, and in binary mixtures with dissimilar aromatic cores or chain lengths, (5) induction of SmC phase in mixtures of some structural isomers and (6) some recent all-atom simulations. The results can be understood on the basis of our molecular theory in which the tilting occurs due to the repulsive coulomb interaction between neighbouring molecules having off-axis dipoles with transverse components and freely rotating about their long axes in smectic layers. The model also takes into account the entropic cost of tilting which depends on the length to width ratio of the molecules. We have included some simple calculations of the induced dipoles in the chains to account for the odd–even effects.	en_US
dc.language.iso	en	en_US
dc.publisher	Taylor & Francis	en_US
dc.relation.uri	http://dx.doi.org/10.1080/02678292.2014.987707	en_US
dc.rights	2015 Taylor & Francis	en_US
dc.subject	molecular tilting in layers	en_US
dc.subject	molecular theories	en_US
dc.subject	off-axis dipoles	en_US
dc.subject	odd-even effects	en_US
dc.subject	re-entrant smectic A phase	en_US
dc.subject	Invited article	en_US
dc.title	Dipolar origin of tilting of rod-like molecules in the smectic C phase	en_US
dc.type	Article	en_US
Appears in Collections:	Research Papers (SCM)

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