New Pyrimidine-based Photo-switchable Bent-core Liquid Crystals
The first examples of liquid crystalline pyrimidine-based photo-switchable bent-core monomers incorporating azobenzene as side arms linked with terminal double bonds as polymerizable functional groups are synthesized and characterized. Polarizing optical microscopy (POM), differential scanning calor...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Royal Society of Chemistry
2013
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/4704/1/New_pyrimidine_based_bent_core_LC.pdf |
| _version_ | 1796989852582936576 |
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| author | M. M., Yusoff Hegde, Gurumurthy Lutfor, M. R. Muhammad Nor Fazli, Abd Malek Srinivasa, Hosapalya T. Kumar, Sandeep |
| author_facet | M. M., Yusoff Hegde, Gurumurthy Lutfor, M. R. Muhammad Nor Fazli, Abd Malek Srinivasa, Hosapalya T. Kumar, Sandeep |
| author_sort | M. M., Yusoff |
| collection | UMP |
| description | The first examples of liquid crystalline pyrimidine-based photo-switchable bent-core monomers incorporating azobenzene as side arms linked with terminal double bonds as polymerizable functional groups are synthesized and characterized. Polarizing optical microscopy (POM), differential scanning calorimetry (DSC) and X-ray diffraction analysis reveal that the bent-shaped lower homologue compounds are crystalline in nature whereas higher homologue compounds display the stable enantiotropic B6 phase. They exhibit fast photoisomerization effects in solution and relatively slow photoisomerization effects in liquid crystal cells. In solution both trans–cis and cis–trans occur at around 3 s and 200 s, respectively, whereas in solids they occur at around 10 s to 200 min. These are some of the first examples of azobenzene liquid crystals which exhibit very fast switching properties in solutions. |
| first_indexed | 2024-03-06T11:43:12Z |
| format | Article |
| id | UMPir4704 |
| institution | Universiti Malaysia Pahang |
| language | English |
| last_indexed | 2024-03-06T11:43:12Z |
| publishDate | 2013 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | UMPir47042018-02-12T08:34:39Z http://umpir.ump.edu.my/id/eprint/4704/ New Pyrimidine-based Photo-switchable Bent-core Liquid Crystals M. M., Yusoff Hegde, Gurumurthy Lutfor, M. R. Muhammad Nor Fazli, Abd Malek Srinivasa, Hosapalya T. Kumar, Sandeep Q Science (General) QD Chemistry The first examples of liquid crystalline pyrimidine-based photo-switchable bent-core monomers incorporating azobenzene as side arms linked with terminal double bonds as polymerizable functional groups are synthesized and characterized. Polarizing optical microscopy (POM), differential scanning calorimetry (DSC) and X-ray diffraction analysis reveal that the bent-shaped lower homologue compounds are crystalline in nature whereas higher homologue compounds display the stable enantiotropic B6 phase. They exhibit fast photoisomerization effects in solution and relatively slow photoisomerization effects in liquid crystal cells. In solution both trans–cis and cis–trans occur at around 3 s and 200 s, respectively, whereas in solids they occur at around 10 s to 200 min. These are some of the first examples of azobenzene liquid crystals which exhibit very fast switching properties in solutions. Royal Society of Chemistry 2013-05 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/4704/1/New_pyrimidine_based_bent_core_LC.pdf M. M., Yusoff and Hegde, Gurumurthy and Lutfor, M. R. and Muhammad Nor Fazli, Abd Malek and Srinivasa, Hosapalya T. and Kumar, Sandeep (2013) New Pyrimidine-based Photo-switchable Bent-core Liquid Crystals. New Journal of Chemistry, 37 (8). pp. 2460-2467. ISSN 1144-0546. (Published) http://dx.doi.org/10.1039/C3NJ00359K DOI: 10.1039/C3NJ00359K |
| spellingShingle | Q Science (General) QD Chemistry M. M., Yusoff Hegde, Gurumurthy Lutfor, M. R. Muhammad Nor Fazli, Abd Malek Srinivasa, Hosapalya T. Kumar, Sandeep New Pyrimidine-based Photo-switchable Bent-core Liquid Crystals |
| title | New Pyrimidine-based Photo-switchable Bent-core Liquid Crystals |
| title_full | New Pyrimidine-based Photo-switchable Bent-core Liquid Crystals |
| title_fullStr | New Pyrimidine-based Photo-switchable Bent-core Liquid Crystals |
| title_full_unstemmed | New Pyrimidine-based Photo-switchable Bent-core Liquid Crystals |
| title_short | New Pyrimidine-based Photo-switchable Bent-core Liquid Crystals |
| title_sort | new pyrimidine based photo switchable bent core liquid crystals |
| topic | Q Science (General) QD Chemistry |
| url | http://umpir.ump.edu.my/id/eprint/4704/1/New_pyrimidine_based_bent_core_LC.pdf |
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