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Synthesis and Characterization of Naphthalene-Based Banana-Shaped Liquid Crystals for Photoswitching Properties.pdf - Published Version Download (41kB) | Preview |
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 -* transition at 365 and low-intensity n-* 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.
Item Type: | Article |
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Additional Information: | Indexes in Scopus and WOS. IF: 0.879 |
Uncontrolled Keywords: | Naphthalene; Azobenzene; Isomerisation; Photoswitching; Optical image storage |
Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
Faculty/Division: | Faculty of Industrial Sciences And Technology |
Depositing User: | Dr. Gurumurthy Hegde |
Date Deposited: | 08 May 2014 02:48 |
Last Modified: | 31 Jan 2018 01:37 |
URI: | http://umpir.ump.edu.my/id/eprint/5470 |
Download Statistic: | View Download Statistics |
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