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Synthesis of Triphenylene-Based Discotic Liquid Crystal Monomer Containing Azobenzene Moieties

Published online by Cambridge University Press:  15 March 2011

Sidik Silong ,
Lutfor Rahman ,
WMZ Wan Yunus ,
M Zaki Rahman ,
Mansor Ahmad  and
Jelas Haron
Sidik Silong
Affiliation:
Department of Chemistry, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
Lutfor Rahman
Affiliation:
Department of Chemistry, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
WMZ Wan Yunus
Affiliation:
Department of Chemistry, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
M Zaki Rahman
Affiliation:
Department of Chemistry, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
Mansor Ahmad
Affiliation:
Department of Chemistry, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
Jelas Haron
Affiliation:
Department of Chemistry, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
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Abstract

The synthesis of a novel discotic liquid crystal monomer was carried out based on vinyl monomer whose molecular architecture consists of a triphenylene as central core and the peripheral cores were linked to the central core through an alkyl chain spacer. Consequently, a disk-like poymerizable monomer 2, 3, 6, 7, 10, 11-hexakis-[11-(4-{4-(acryloxy)phenylazo}phenoxy)undecanoxy]triphenylene was prepared by using a ferric chloride oxidation method. Polarizing optical microscopy and DSC analysis shows that the monomer exhibited a wide columnar mesophase. UV-vis spectra of the azobenzene mesogens showed that a significant tailing, which would allow the use of laser in the visible range to photoinduce isomerization and reorientation of the azo groups.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 709: Symposium CC – Advances in Liquid Crystalline Materials and Technologies , 2001 , CC5.4.1
Copyright
Copyright © Materials Research Society 2002

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References

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