New Pyrimidine-based Photo-switchable Bent-core Liquid Crystals

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)

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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.

Item Type: Article
Additional Information: 1 Citation. IF: 2.966
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Faculty/Division: Faculty of Industrial Sciences And Technology
Depositing User: Prof. Dr. Mashitah Mohd Yusoff
Date Deposited: 24 Mar 2014 02:11
Last Modified: 12 Feb 2018 08:34
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