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http://hdl.handle.net/2289/6131| Title: | Synthesis and characterization of naphthalene-based banana-shaped liquid crystals for photoswitching properties |
| Authors: | Rahman, Md Lutfor Yusoff, Mashitah Mohd Srinivasa, H.T. Kumar, Sandeep +3 Co-authors |
| Keywords: | Azobenzene Isomerisation Photoswitching Optical image storage |
| Issue Date: | May-2014 |
| Publisher: | Wiley-VCH Verlag |
| Citation: | Journal of the Chinese Chemical Society, 2014, Vol. 61, p571-577 |
| Abstract: | A series of banana-shaped monomers containing naphthalene as central units, azobenzene in side arms with terminal alkenes were synthesized and characterized. Polarizing optical microscopy, DSC and X-ray diffraction measurements reveal that one compound processes a nematic phase while other four compounds exhibit B6 phase. The absorption spectrum of trans-azobenzene displays high-intensity π-π* transition at 365 and low-intensity n-π* transition at 450 nm. These molecules exhibit strong photoisomerisation behaviour in solutions in which trans to cis isomerisation takes 55 seconds whereas reverse process takes about 32 hours. Such a long thermal back relaxation is useful for creation of optical image storage devices. |
| Description: | Restricted Access. |
| URI: | http://hdl.handle.net/2289/6131 |
| ISSN: | 2192-6549 |
| Alternative Location: | http://dx.doi.org/10.1002/jccs.201300191 |
| Copyright: | 2014 The Chemical Society Located in Taipei & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany |
| Appears in Collections: | Research Papers (SCM) |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| 2014_J. Chin. Chem. Soc_61_571-577.pdf Restricted Access | Restricted Access | 972.06 kB | Adobe PDF | View/Open Request a copy |
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