Synthesis and Characterization of Liquid Crystalline Azobenzene Chromophores with Fluorobenzene Terminal
Two series of fluorine-substituted benzoate ester type rod-shaped liquid crystals incorporating the azobenzene as side arm linked with terminal double bonds as polymerizable functional groups were synthesized and characterized by polarized-light optical microscopy (POM), differential scanning calori...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English English |
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Elsevier
2013
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| Online Access: | http://umpir.ump.edu.my/id/eprint/4697/ http://umpir.ump.edu.my/id/eprint/4697/1/fist-2013-mashitah-SynthesisAndCharacterization.pdf http://umpir.ump.edu.my/id/eprint/4697/2/Published_paper_-2013.pdf |
| _version_ | 1848817447441793024 |
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| author | M. M., Yusoff Lutfor, M. R. Hegde, Gurumurthy Mahrokh, Azazpour Sandeep, Kumar |
| author_facet | M. M., Yusoff Lutfor, M. R. Hegde, Gurumurthy Mahrokh, Azazpour Sandeep, Kumar |
| author_sort | M. M., Yusoff |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | Two series of fluorine-substituted benzoate ester type rod-shaped liquid crystals incorporating the azobenzene as side arm linked with terminal double bonds as polymerizable functional groups were synthesized and characterized by polarized-light optical microscopy (POM), differential scanning calorimetry (DSC) and UV–visible spectroscopy investigations. Thus, rod-shaped monomers, namely 4a and 4b having odd and even number of carbon in the terminal group exhibited nematic phase and SmA type phase was found at lower temperature. Compound 5 showed nematic phase whereas compound 6 showed SmA phase. These rod-shaped molecules exhibit strong photoisomerization behaviour in solution. The photoswitching properties of the compounds showed trans to cis isomerization in about 10 s, whereas the reverse process takes place about 120 min in solutions. Proposed materials may have potential to use it in optical storage devices. |
| first_indexed | 2025-11-15T01:21:55Z |
| format | Article |
| id | ump-4697 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T01:21:55Z |
| publishDate | 2013 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-46972018-02-12T08:22:30Z http://umpir.ump.edu.my/id/eprint/4697/ Synthesis and Characterization of Liquid Crystalline Azobenzene Chromophores with Fluorobenzene Terminal M. M., Yusoff Lutfor, M. R. Hegde, Gurumurthy Mahrokh, Azazpour Sandeep, Kumar Q Science (General) QD Chemistry Two series of fluorine-substituted benzoate ester type rod-shaped liquid crystals incorporating the azobenzene as side arm linked with terminal double bonds as polymerizable functional groups were synthesized and characterized by polarized-light optical microscopy (POM), differential scanning calorimetry (DSC) and UV–visible spectroscopy investigations. Thus, rod-shaped monomers, namely 4a and 4b having odd and even number of carbon in the terminal group exhibited nematic phase and SmA type phase was found at lower temperature. Compound 5 showed nematic phase whereas compound 6 showed SmA phase. These rod-shaped molecules exhibit strong photoisomerization behaviour in solution. The photoswitching properties of the compounds showed trans to cis isomerization in about 10 s, whereas the reverse process takes place about 120 min in solutions. Proposed materials may have potential to use it in optical storage devices. Elsevier 2013-12 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/4697/1/fist-2013-mashitah-SynthesisAndCharacterization.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/4697/2/Published_paper_-2013.pdf M. M., Yusoff and Lutfor, M. R. and Hegde, Gurumurthy and Mahrokh, Azazpour and Sandeep, Kumar (2013) Synthesis and Characterization of Liquid Crystalline Azobenzene Chromophores with Fluorobenzene Terminal. Journal of Fluorine Chemistry, 156. pp. 230-235. ISSN 0022-1139. (Published) http://dx.doi.org/10.1016/j.jfluchem.2013.10.004 DOI: 10.1016/j.jfluchem.2013.10.004 |
| spellingShingle | Q Science (General) QD Chemistry M. M., Yusoff Lutfor, M. R. Hegde, Gurumurthy Mahrokh, Azazpour Sandeep, Kumar Synthesis and Characterization of Liquid Crystalline Azobenzene Chromophores with Fluorobenzene Terminal |
| title | Synthesis and Characterization of Liquid Crystalline Azobenzene Chromophores with Fluorobenzene Terminal |
| title_full | Synthesis and Characterization of Liquid Crystalline Azobenzene Chromophores with Fluorobenzene Terminal |
| title_fullStr | Synthesis and Characterization of Liquid Crystalline Azobenzene Chromophores with Fluorobenzene Terminal |
| title_full_unstemmed | Synthesis and Characterization of Liquid Crystalline Azobenzene Chromophores with Fluorobenzene Terminal |
| title_short | Synthesis and Characterization of Liquid Crystalline Azobenzene Chromophores with Fluorobenzene Terminal |
| title_sort | synthesis and characterization of liquid crystalline azobenzene chromophores with fluorobenzene terminal |
| topic | Q Science (General) QD Chemistry |
| url | http://umpir.ump.edu.my/id/eprint/4697/ http://umpir.ump.edu.my/id/eprint/4697/ http://umpir.ump.edu.my/id/eprint/4697/ http://umpir.ump.edu.my/id/eprint/4697/1/fist-2013-mashitah-SynthesisAndCharacterization.pdf http://umpir.ump.edu.my/id/eprint/4697/2/Published_paper_-2013.pdf |