Simple Search:

Synthesis and mesomorphic properties of non-symmetric liquid crystalline dimers containing azobenzene groups


Citation

Rahman, Md Lutfor and Asik, Jahimin and Kumar, Sandeep and Silong, Sidik and Ab. Rahman, Mohamad Zaki (2009) Synthesis and mesomorphic properties of non-symmetric liquid crystalline dimers containing azobenzene groups. Phase Transitions: A Multinational Journal, 82 (3). pp. 228-239. ISSN 0141–1594

Abstract / Synopsis

Four novel nonsymmetric dimers containing azobenzene mesogenic groups were synthesized. The nonsymmetric dimers compounds namely, ethyl 4-[(4-{4-(4-((4-nitrophenyl)diazenyl)phenoxy)alkyloxy}phenyl)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 –* transition at about 365nm and a low-intensity n–* transition at around 465 nm, therefore, photochromism can be achieved by the introduction of the azo linkage to the dimeric liquid crystalline molecules.


Download File

[img]
Preview
PDF (Abstract)
Synthesis and mesomorphic properties of non.pdf

Download (180kB) | Preview

Additional Metadata

Item Type: Article
Subject: Dimers - Analysis
Subject: Dimers - Properties
Subject: Azo compounds
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1080/01411590802642406
Publisher: Taylor & Francis
Keywords: Mesophase; Azobenzene; Nonsymmetric dimmers; Cis–trans isomers; Nematic; Smectic
Depositing User: Najwani Amir Sariffudin
Date Deposited: 27 Aug 2012 09:09
Last Modified: 30 Oct 2015 02:30
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1080/01411590802642406
URI: http://psasir.upm.edu.my/id/eprint/16941
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item