Browsing by Author "Yuvaraj, A.R."

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    Light Sensitive Molecule for Photonic Devices
    (2015) Hegde, G.; Fernandes, P.Z.; Yuvaraj, A.R.; Mei, G.S.; Rahman, L.; Yusoff, M.M.
    Summary Light induced effects on rod and bent shaped liquid crystals with azobenzene moiety were investigated using UV/Vis spectrophotometer. Study revealed that shape of the structure influenced their relaxation behavior in that fast thermal back relaxation in rod shape (monoazo substitution) form, while long thermal back relaxation in bent shape forms (diazo substitution). Both relaxation times are useful for creation of optical rewritable boards, optical storage devices, etc. � 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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    Light Sensitive Molecule for Photonic Devices
    (Wiley-VCH Verlag, 2015) Hegde, H.; Fernandes, P.Z.; Yuvaraj, A.R.; Mei, G.S.; Lutfor, M.R.; Mohd Yusoff, M.M.
    Summary Light induced effects on rod and bent shaped liquid crystals with azobenzene moiety were investigated using UV/Vis spectrophotometer. Study revealed that shape of the structure influenced their relaxation behavior in that fast thermal back relaxation in rod shape (monoazo substitution) form, while long thermal back relaxation in bent shape forms (diazo substitution). Both relaxation times are useful for creation of optical rewritable boards, optical storage devices, etc. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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    Polarity dependent photoisomerization of ether substituted azodyes: Synthesis and photoswitching behavior
    (Elsevier, 2015) Gan, S.M.; Pearl, Z.F.; Yuvaraj, A.R.; Lutfor, M.R.; Hegde, H.
    Two new ether substituted azodyes were synthesized and characterized by different spectral analysis such as 1H NMR, 13C NMR, FTIR and UV/Vis. Synthesized compounds were used to study the photoisomerization phenomenon by using UV-Vis spectro-photometer. Interesting polarity dependent effect is observed for the first time on these materials. Trans-cis (E-Z) and cis-trans (Z-E) conversion occurred within 41 s and 445 min, respectively for both the compounds in solutions. Polarizing optical microscopy studies revealed that there is no liquid crystal phase for both the compounds. The dramatic variation in the optical property is speculated to be the polarity of the chemical species. These derivatives are useful to fabricate optical data storage devices. © 2015 Published by Elsevier B.V.