Synthesis and mesomorphic properties of nonsymmetric liquid crystalline dimers containing azobenzene groups

Rahman, Md Lutfor; Asik, Jahimin; Kumar, Sandeep; Silong, Sidik; Rahman, M.Z.A.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3805

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DC Field	Value	Language
dc.contributor.author	Rahman, Md Lutfor	-
dc.contributor.author	Asik, Jahimin	-
dc.contributor.author	Kumar, Sandeep	-
dc.contributor.author	Silong, Sidik	-
dc.contributor.author	Rahman, M.Z.A.	-
dc.date.accessioned	2009-07-22T09:58:25Z	-
dc.date.available	2009-07-22T09:58:25Z	-
dc.date.issued	2009-03	-
dc.identifier.citation	Phase Transitions, 2009, Vol.82, p228	en
dc.identifier.issn	E-ISSN: 1029-0338	-
dc.identifier.issn	P-ISSN: 0141-1594	-
dc.identifier.uri	http://hdl.handle.net/2289/3805	-
dc.description	Restricted Access.	en
dc.description.abstract	Four novel nonsymmetric dimers containing azobenzene mesogenic groups were synthesized. The nonsymmetric dimers compounds namely, ethyl 4-[(4-lcub4-(4-((4-nitrophenyl)diazenyl)phenoxy)alkyloxyrcubphenyl)diazenyl]benzoate were obtained from the alkylation of ethyl 4-[(4-(4-bromoalkyloxy)phenyl)diazenyl]benzoate with 4-[(4-nitrophenyl)diazenyl]phenol. The mesomorphic properties of the compounds were determined by DSC and polarizing optical microscopy. The first member of the series was nonliquid crystalline while all other homologues display nematic and smectic A phases. The trans-azobenzene groups of the dimers display a high-intensity π-π* transition at about 365 nm and a low-intensity n-π* transition at around 465 nm, therefore, photochromism can be achieved by the introduction of the azo linkage to the dimeric liquid crystalline molecules.	en
dc.language.iso	en	en
dc.publisher	Taylor & Francis	en
dc.relation.uri	http://dx.doi.org/10.1080/01411590802642406	en
dc.rights	2009 Taylor & Francis	en
dc.subject	mesophase	en
dc.subject	azobenzene	en
dc.subject	nonsymmetric dimers	en
dc.subject	cis-trans isomers	en
dc.subject	nematic	en
dc.subject	smectic	en
dc.title	Synthesis and mesomorphic properties of nonsymmetric liquid crystalline dimers containing azobenzene groups	en
dc.type	Article	en
Appears in Collections:	Research Papers (SCM)

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