Synthesis, Liquid Crystal Characterization and Photo-Switching Studies on Fluorine Substituted Azobenzene based Esters
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...
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| Format: | Article |
| Language: | English English |
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Royal Society of Chemistry
2015
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| Online Access: | http://umpir.ump.edu.my/id/eprint/8081/1/fist-2015-lutfor-synthesis%20liquid%20crystal%20characterization-full.pdf http://umpir.ump.edu.my/id/eprint/8081/7/Synthesis%2C%20Liquid%20Crystal%20Characterization%20and%20Photo-Switching%20Studies%20on%20Fluorine%20Substituted%20Azobenzene%20Based%20Esters.pdf |
| _version_ | 1796990385687363584 |
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| author | Mei, Gan Siew A. R., Yuvaraj Lutfor, M. R. M. M., Yusoff Hegde, Gurumurthy |
| author_facet | Mei, Gan Siew A. R., Yuvaraj Lutfor, M. R. M. M., Yusoff Hegde, Gurumurthy |
| author_sort | Mei, Gan Siew |
| collection | UMP |
| description | 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. |
| first_indexed | 2024-03-06T11:50:47Z |
| format | Article |
| id | UMPir8081 |
| institution | Universiti Malaysia Pahang |
| language | English English |
| last_indexed | 2024-03-06T11:50:47Z |
| publishDate | 2015 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | UMPir80812018-02-12T08:19:13Z http://umpir.ump.edu.my/id/eprint/8081/ Synthesis, Liquid Crystal Characterization and Photo-Switching Studies on Fluorine Substituted Azobenzene based Esters Mei, Gan Siew A. R., Yuvaraj Lutfor, M. R. M. M., Yusoff Hegde, Gurumurthy QD Chemistry QC Physics 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. Royal Society of Chemistry 2015-12-15 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/8081/1/fist-2015-lutfor-synthesis%20liquid%20crystal%20characterization-full.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/8081/7/Synthesis%2C%20Liquid%20Crystal%20Characterization%20and%20Photo-Switching%20Studies%20on%20Fluorine%20Substituted%20Azobenzene%20Based%20Esters.pdf 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) http://dx.doi.org/10.1039/C4RA13700K DOI: 10.1039/C4RA13700K |
| spellingShingle | QD Chemistry QC Physics Mei, Gan Siew A. R., Yuvaraj Lutfor, M. R. M. M., Yusoff Hegde, Gurumurthy Synthesis, Liquid Crystal Characterization and Photo-Switching Studies on Fluorine Substituted Azobenzene based Esters |
| title | Synthesis, Liquid Crystal Characterization and Photo-Switching Studies on Fluorine Substituted Azobenzene based Esters |
| title_full | Synthesis, Liquid Crystal Characterization and Photo-Switching Studies on Fluorine Substituted Azobenzene based Esters |
| title_fullStr | Synthesis, Liquid Crystal Characterization and Photo-Switching Studies on Fluorine Substituted Azobenzene based Esters |
| title_full_unstemmed | Synthesis, Liquid Crystal Characterization and Photo-Switching Studies on Fluorine Substituted Azobenzene based Esters |
| title_short | Synthesis, Liquid Crystal Characterization and Photo-Switching Studies on Fluorine Substituted Azobenzene based Esters |
| title_sort | synthesis liquid crystal characterization and photo switching studies on fluorine substituted azobenzene based esters |
| topic | QD Chemistry QC Physics |
| url | http://umpir.ump.edu.my/id/eprint/8081/1/fist-2015-lutfor-synthesis%20liquid%20crystal%20characterization-full.pdf http://umpir.ump.edu.my/id/eprint/8081/7/Synthesis%2C%20Liquid%20Crystal%20Characterization%20and%20Photo-Switching%20Studies%20on%20Fluorine%20Substituted%20Azobenzene%20Based%20Esters.pdf |
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