Mei, Gan Siew and A. R., Yuvaraj and Lutfor, M. R. and M. M., Yusoff and Hegde, Gurumurthy (2015) Synthesis, Liquid Crystal Characterization and Photo-Switching Studies on Fluorine Substituted Azobenzene based Esters. RSC Advances, 5 (9). pp. 6279-6285. ISSN 2046-2069. (Published)
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Abstract
A series offluorinated azobenzene esters have been synthesized and studied by polarized optical microscopy (POM) and UV-Vis spectrophotometry. The–CO2C2H5group with monofluoro-substituted azobenzene exhibited nematic and smectic phases whereas difluoro-substituted azobenzene showed only the nematic phase. The addition of the electronegativefluorine atom plays an important role in photoisomerization of the azobenzene molecules. The monofluoro-substituted azobenzene gave strong photoisomerization in solution as compared with its diflouro counterparts. In these systems,trans–cis isomerization occurred after 4 minutes and cis–trans isomerization occurred after 22 hours which is much longer than expected forfluorine-substituted azobenzene systems. The presented results might have an influence on creating optical data storage devices.
| Item Type: | Article |
|---|---|
| Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
| Faculty/Division: | Faculty of Industrial Sciences And Technology |
| Depositing User: | Dr. Gurumurthy Hegde |
| Date Deposited: | 08 Jan 2015 09:01 |
| Last Modified: | 12 Feb 2018 08:19 |
| URI: | http://umpir.ump.edu.my/id/eprint/8081 |
| Download Statistic: | View Download Statistics |
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