H-shaped azoester-oxymethylene containing twin liquid crystalline compounds

Varia, M.C.; Kumar, Sandeep; Prajapati, A.K.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4501

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DC Field	Value	Language
dc.contributor.author	Varia, M.C.	-
dc.contributor.author	Kumar, Sandeep	-
dc.contributor.author	Prajapati, A.K.	-
dc.date.accessioned	2012-05-22T09:32:00Z	-
dc.date.available	2012-05-22T09:32:00Z	-
dc.date.issued	2012-03	-
dc.identifier.citation	Liquid Crystals, 2012, Vol.39, p365-371	en
dc.identifier.issn	0267-8292	-
dc.identifier.issn	1366-5855 (online)	-
dc.identifier.uri	http://hdl.handle.net/2289/4501	-
dc.description	Restricted Access.	en
dc.description.abstract	Two mesogenic homologous series of H-shaped symmetrical dimers were synthesised and their thermotropic properties studied by differential scanning calorimetry and on a hot-stage of a polarising microscope. These compounds consisted of two mesogenic units of azoester interconnected through tetramethylene flexible spacers (n = 4) by ether linkage resulting in the structure of ‘H-shaped’ dimeric compounds. The difference between the two series was in the structure of terminal substituents (–CH3 for series I and –OCH3 for series II) attached on the azoestermesogens at one terminus. All these compounds were found to be smectogenic. The mesomorphic properties of the series were compared with each other and with other structurally related mesogenic H-shaped dimers. The trans-azobenzene groups of the H-shaped dimeric compounds displayed a high-intensity π–π ∗ transition at about 365 nm and a low intensity π–π ∗ transition at around 470 nm, therefore photochromism can be achieved by the introduction of the azo linkage to the H-shaped dimeric compounds.	en
dc.language.iso	en	en
dc.publisher	Taylor & Francis	en
dc.relation.uri	http://dx.doi.org/10.1080/02678292.2012.657696	en
dc.rights	2012 Taylor & Francis	en
dc.subject	azoester	en
dc.subject	DSC	en
dc.subject	ether linkage	en
dc.subject	H-shaped	en
dc.subject	symmetrical dimers	en
dc.subject	smectic C	en
dc.title	H-shaped azoester-oxymethylene containing twin liquid crystalline compounds	en
dc.type	Article	en
Appears in Collections:	Research Papers (SCM)

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