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    Novel copper(II) complexes of two tridentate ONN type ligands: Synthesis, characterization, electrical conductivity and luminescence properties
    (Elsevier Science Sa, 2018) Gonul, Ilyas; Burak, A. Y.; Karaca, Serkan; Sahin, Onur; Serin, Selahattin
    Herein, we describe the synthesis and characterization of two novel tridentate ONN donor ligands, namely, (E)-2-(((2-(dimethylamino)ethyl)imino)methyl)-6-methoxyphenol (HL1) and (E)-2-(((2-(dimethylamino)ethyl)imino)methyl)-6-ethoxyphenol (HL2), and their copper(II) complexes, [Cu-2(L-1)(2)(CH3COO)(2)] (1), [Cu(L-2)(CH3COO)]center dot 2H(2)O (2). They have been synthesized under conventional methods and characterized by elemental analysis, FT-IR, H-1 NMR, C-11 NMR, ICP-OES, TGA, DSC and GC/MS analysis. For the morphological analysis field emission scanning electron microscopy (FESEM) was used. The geometry of the Cu(II) complexes was determined by single crystal X-ray diffraction analysis. The Cu(II) ions are in distorted square-pyramidal coordination environments. 1 crystallizes in orthorhombic space group, Pbca, while 2 crystallizes in monoclinic space group, P2(1)/c. Effects of different solvents and concentrations on the photoluminescence properties of the 1-2 were investigated. The emission bands bathochromically shifted due to increase of the dipole moments of EtOH to H2O and CHCl3 to DMSO, respectively. As a result of the dynamic quenching, the intensity of 1 was decreased with increasing the concentration in the water. The electrical conductivity complexes 1-2 have been also investigated. (C) 2018 Elsevier B.V. All rights reserved.
  • [ X ]
    Öğe
    Synthesis, characterization, electrical conductivity and luminescence properties of two copper(II) complexes with tridentate N2O chelating ligands containing imine bond
    (Elsevier Science Bv, 2018) Gonul, Ilyas; Ay, Burak; Karaca, Serkan; Sahin, Onur; Serin, Selahattin
    In the present study, we describe the synthesis and characterization of two tridentate N2O donor ligands, namely, (E)-2-(((2-(diethylamino)ethyl)imino)methyl)-6-methoxyphenol (HL1) and (E)-2-(((2-(diethylamino)ethyl)imino)methyl)-6-ethoxyphenol (HL2), and their copper(II) complexes, [Cu(L-1)(CH3COO)] (1), [Cu(L-2)(CH3COO)] (2). They have been synthesized under conventional methods and characterized by elemental analysis, FTIR, H-1 and C-13 NMR, ICP-OES, TGA and GC/MS analysis. For the morphological analysis field emission scanning electron microscopy (FESEM) was used. The geometry of the copper(II) complexes was determined by single crystal X-ray diffraction analysis. The copper(II) ions are in distorted square-pyramidal coordination environments. Complexes crystallize in monoclinic space group, P2(1)/c. The electrical conductivity and luminescence properties of 1-2 have been investigated. (C) 2017 Elsevier B.V. All rights reserved.
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    Öğe
    The new water-soluble Schiff base derivative fluorometric chemosensor with highly selective and instantly sensitivity for Fe3+ ion detection in aqueous media
    (Elsevier Science Sa, 2021) Celik, Gizem Gumusgoz; Senkuytu, Elif; Sahin, Onur; Serin, Selahattin
    The design and development of smart molecules used as fluorescent sensors, which play important roles in many applications with high selectivity and sensitivity toward heavy and transition metal ions have received considerable attention in recent years. In this study, the photophysical and chemosensor properties of the water-soluble Schiff base compound (3), which solid-state structure and geometry were determined using single crystal X-ray structural analysis were investigated. The metal sensing behaviors of the compound 3 was determined in the presence of various metals (Li+, Na+, K+, Mg2+, Ca2+, Ba2+, Mn2+, Fe3+, Fe2+, Cu2+, Cr3+, Co2+, Ni2+, Ag+, Cd2+, Al3+, Hg+ and Zn2+) using fluorescence spectroscopy. A significant decrease in fluorescence signals was observed with the addition of Fe3+ ions, and the limits of detection was calculated as 1.29 mu M for this ion. Also, the complex stoichiometry of the compound 3 and Fe3+ ion was determined as 1:1 (L/M) by fluorescence titrations (Job's plot). The results showed that compound 3 could be used as a fluorescent chemosensor with high selectivity and sensitivity, which are instantly responsive to Fe3+ ions in the aqua media.