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Calamatic azobenzine liquid crystal series: synthesis and mesomorphic properties of 1-methoxyalkyloxy-4'-(4-phenylazo)acetophenone


Salisu, Abdulsalam Abubakar and Ab. Rahman, Mohamad Zaki and Silong, Sidik and Rahman, Lutfor and Ahmad @ Ayob, Mansor (2009) Calamatic azobenzine liquid crystal series: synthesis and mesomorphic properties of 1-methoxyalkyloxy-4'-(4-phenylazo)acetophenone. Asian Journal of Materials Science, 1 (1). pp. 22-28. ISSN 1996-3394


New series of calamitic liquid crystal materials with rod-shape azobenzene moieties as a core has been synthesized and characterized by spectroscopic methods. The mesomorphic properties were investigated by differential scanning colorimetry, polarizing optical microscopy and X-ray diffraction. The rod-shaped molecule 1-methoxyalkyloxy-4`-(4-phenylazo)acetophenone was prepared by diazotization of 4-Aminoacetophenone, coupling with phenol and subsequent etherification of 1-bromoalkyloxy-4`-(4-phenylazo)acetophenone in methanol. The presence of smectic A mesophases was confirmed by the textures and X-ray diffraction studies. Compounds 4a-4d (C3-C6) exhibits enantiotropic smectic A phase while, compound 4d (C8) show monotropic smectic A phase.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.3923/ajmskr.2009.22.28
Publisher: Asian Network for Scientific Information
Keywords: Liquid crystal; Azobenzene; Calamatic; Smectic phase
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 08 Jun 2015 07:03
Last Modified: 11 Oct 2018 06:50
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3923/ajmskr.2009.22.28
URI: http://psasir.upm.edu.my/id/eprint/13472
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