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    Improved Solubility of Morin Using p-sulphonatocalix[4]arene as Encapsulating Agent: HPLC Analysis and their Molecular Modelling
    (Taylor and Francis Inc., 2018) Khokhar T.S.; Memon S.; Memon A.A.; Bhatti A.A.; Bhatti A.A.
    This study reports the use of water-soluble p-sulphonatocalix[4]arene (pSC-3) as solubilizing agent to improve the water solubility of morin, an exceptional antioxidant. Stoichiometry, stability constant, and mechanism of complex were investigated by UV-Vis and HPLC analysis and characterized by FTIR spectroscopy. Results indicate that 25% morin was encapsulated on pSC-3 at pH 7.3 and phase solubility study suggested 10 fold increase in water solubility of morin while 1:1 stoichiometric ratio was confirmed by Job's plot. Binding constant for inclusion complex was found to be 6.67 × 104 M?1 calculated by using the Benesi–Hildebrand equation. In order to study the detailed structural properties of the complex, molecular mechanism approach was applied to calculate different energies associated with complex. © 2018 Taylor & Francis Group, LLC
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    Surface coating of magnetite nanoparticles with fluorescence derivative for the detection of mercury in water environments
    (Elsevier B.V., 2020) Oguz M.; Bhatti A.A.; Yilmaz M.
    In this study, we report synthesis of new fluorescent compound integrated with Fe3O4 nanoparticles for the detection of mercury ion (Hg2+) in aqueous environment. Fluorescent compound synthesized by reacting dansyl chloride with isonipecotic acid in one simple step reaction. The synthesized compound, dansyl-isonipecotic acid (DIA) was coated on Fe3O4 nanoparticles. Fe3O4-DIA nanoparticles have average size of 20 nm and pore size 0.3 nm as confirmed from Transmission Electron Microscope (TEM). Fluorescence study shows the quenching in intensity after addition of Hg2+ ion in Fe3O4-DIA nanoparticles solution, which is due to energy transfer from excited state of ligand to low-lying empty d-orbital of Hg2+. The quenching effect was also confirmed from confocal microscope images of Fe3O4-DIA nanoparticles. © 2020 Elsevier B.V.