Synthesis and Photoswitching Properties of Bent-shaped Liquid Crystals Containing Azobenzene Monomers
Three novel bent-shaped monomers, namely 1,3-phenylene bis-{4-[4-(n-allyloxyalkyloxy)phenylazo]benzoate} 5a–c, containing azobenzene as side arms, resorcinol as central units and terminal double bonds as polymerisable functional groups were synthesised and characterised. The mesophase behaviour was...
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| Format: | Article |
| Language: | English |
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Taylor & Francis
2009
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| Online Access: | http://umpir.ump.edu.my/id/eprint/5412/ http://umpir.ump.edu.my/id/eprint/5412/1/2009_photoswitching.pdf |
| _version_ | 1848817590852386816 |
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| author | Hegde, Gurumurthy Lutfor, M. R. Kumar, Sandeep Tschierske, Carsten Israel, Gunter Ster, Diana |
| author_facet | Hegde, Gurumurthy Lutfor, M. R. Kumar, Sandeep Tschierske, Carsten Israel, Gunter Ster, Diana |
| author_sort | Hegde, Gurumurthy |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | Three novel bent-shaped monomers, namely 1,3-phenylene bis-{4-[4-(n-allyloxyalkyloxy)phenylazo]benzoate} 5a–c, containing azobenzene as side arms, resorcinol as central units and terminal double bonds as polymerisable functional groups were synthesised and characterised. The mesophase behaviour was investigated by polarising optical microscopy, differential scanning calorimetry and X-ray diffraction measurements and it was found that all three compounds display SmAintercal mesophases. These bent-shaped molecules exhibit strong photoisomerisation behaviour in solutions in which trans to cis isomerisation takes about 50 seconds whereas the reverse process takes almost 31 hours. |
| first_indexed | 2025-11-15T01:24:12Z |
| format | Article |
| id | ump-5412 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T01:24:12Z |
| publishDate | 2009 |
| publisher | Taylor & Francis |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-54122018-05-18T01:28:44Z http://umpir.ump.edu.my/id/eprint/5412/ Synthesis and Photoswitching Properties of Bent-shaped Liquid Crystals Containing Azobenzene Monomers Hegde, Gurumurthy Lutfor, M. R. Kumar, Sandeep Tschierske, Carsten Israel, Gunter Ster, Diana Q Science (General) QC Physics Three novel bent-shaped monomers, namely 1,3-phenylene bis-{4-[4-(n-allyloxyalkyloxy)phenylazo]benzoate} 5a–c, containing azobenzene as side arms, resorcinol as central units and terminal double bonds as polymerisable functional groups were synthesised and characterised. The mesophase behaviour was investigated by polarising optical microscopy, differential scanning calorimetry and X-ray diffraction measurements and it was found that all three compounds display SmAintercal mesophases. These bent-shaped molecules exhibit strong photoisomerisation behaviour in solutions in which trans to cis isomerisation takes about 50 seconds whereas the reverse process takes almost 31 hours. Taylor & Francis 2009 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/5412/1/2009_photoswitching.pdf Hegde, Gurumurthy and Lutfor, M. R. and Kumar, Sandeep and Tschierske, Carsten and Israel, Gunter and Ster, Diana (2009) Synthesis and Photoswitching Properties of Bent-shaped Liquid Crystals Containing Azobenzene Monomers. Liquid Crystals, 36 (4). pp. 397-407. ISSN 0267-8292 (print); 1366-5855 (online). (Published) http://dx.doi.org/10.1080/02678290902923428 DOI: 10.1080/02678290902923428 |
| spellingShingle | Q Science (General) QC Physics Hegde, Gurumurthy Lutfor, M. R. Kumar, Sandeep Tschierske, Carsten Israel, Gunter Ster, Diana Synthesis and Photoswitching Properties of Bent-shaped Liquid Crystals Containing Azobenzene Monomers |
| title | Synthesis and Photoswitching Properties of Bent-shaped Liquid Crystals Containing Azobenzene Monomers |
| title_full | Synthesis and Photoswitching Properties of Bent-shaped Liquid Crystals Containing Azobenzene Monomers |
| title_fullStr | Synthesis and Photoswitching Properties of Bent-shaped Liquid Crystals Containing Azobenzene Monomers |
| title_full_unstemmed | Synthesis and Photoswitching Properties of Bent-shaped Liquid Crystals Containing Azobenzene Monomers |
| title_short | Synthesis and Photoswitching Properties of Bent-shaped Liquid Crystals Containing Azobenzene Monomers |
| title_sort | synthesis and photoswitching properties of bent-shaped liquid crystals containing azobenzene monomers |
| topic | Q Science (General) QC Physics |
| url | http://umpir.ump.edu.my/id/eprint/5412/ http://umpir.ump.edu.my/id/eprint/5412/ http://umpir.ump.edu.my/id/eprint/5412/ http://umpir.ump.edu.my/id/eprint/5412/1/2009_photoswitching.pdf |