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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
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
Copyright
Copyright © Materials Research Society 2002

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References

REFERENCES

1. Cammidge, A. N. and Bushby, R. J., Hand Book of Liquid crystals, edited by Demus, D., Goodby, J., Gray, G. W., Spiess, H-W., and Vill, V. (Wiley-VCH, 1998), Vol 2B, Chap. VII.Google Scholar
2. Keinan, E., Kumar, S., Moshenberg, R., Girlando, R. and Wachtel, E., Liq. Cryst. 11, 157 (1993).Google Scholar
3. Stewart, D., Gillian, S. M. and Imrie, C. T., J. Mater. Chem. 8(1), 47 (1998).Google Scholar
4. Boden, N., Bushby, R. J. and Cammidge, A. N., J. Am. Chem. Soc. 117, 924 (1995).Google Scholar
5. Boden, N. and Movaghar, B., Hand Book of Liquid crystals, edited by Demus, D., Goodby, J., Gray, G. W., Spiess, H-W., and Vill, V. (Wiley-VCH, 1998), Vol. 2B, Chap. IX.Google Scholar
6. Chandrasekhar, S., Hand Book of Liquid crystals, edited by Demus, D., Goodby, J., Gray, G. W., Spiess, H-W., and Vill, V. (Wiley-VCH, 1998), Vol. 2B, Chap. VIII.Google Scholar
7. Staff, I. H., Stumpflen, V., Wendorff, J. H., Sophn, D. B., and Mobius, D., Liq. Cryst. 23, 613 (1997).Google Scholar
8. Markovitsi, D., Germain, A., Millie, P., Lecuyer, P., Gallos, L. K., Argyrakis, P., Bengs, H. and Ringsdorf, H., J. Phys. Chem. 99, 1005 (1995).Google Scholar
9. Kumar, S. and Manickam, M., Liq. Cryst. 26, 939 (1999).Google Scholar
10. Stracke, A., Wendorff, J. H., Goldmann, D. and Janietz, D., Liq. Cryst. 27, 1049 (2000).Google Scholar
11. Boden, N., Borner, R. C., Bushby, R. J., Cammidge, A. N. and Jesudason, M. V., Liq. Cryst. 15, 851 (1993).Google Scholar
12. Levesque, I. and Lecerc, M., Macromolecules, 30, 4347 (1997).Google Scholar