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    Synthesis, spectral, and thermal studies of Co(II), Ni(II), Cu(II), and Zn(II)-glycinato complexes and ınvestigation of their biological properties: Crystal structure of [Cu(µ-gly)2(H2O)]n
    (Taylor and Francis Inc., 2016) Köse, Dursun Ali; Toprak, Emre; Kaşarcı, Aliye; Avcı, Emre; Alp Avcı, Gülçin; Şahin, Onur; Buyükgüngör, Orhan
    The complexes of metal cations with glycine amino acid were synthesized and characterized by FTIR, TGA, UV-Vis, and elemental analysis methods. Just the CuII-complex was suitably obtained as a single crystal. Neighboring chains are linked together to form a three-dimensional network via hydrogen-bonding interactions between coordinated water molecule, amino atoms, and O atoms of the bridging carboxylate groups. The other complex structures were thought to be similar to the CuII structure, and because of their spectroscopic studies they are similar to each other. Finally, the biological activities of complexes were investigated. The metal complexes showed more antimicrobial activity. The total antioxidant capacity of the metal complexes was determined. © 2016 Taylor and Francis Group, LLC.
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    Öğe
    Synthesis, spectral, thermal studies of Co(II), Ni(II), Cu(II) and Zn(II)-arginato Complexes. crystal structure of monoaquabis(arginato??O,?N)copper(II). [Cu(arg)2(H2O)].NaNO3
    (Chinese Chemical Society Taiwan, 2014) Köse, Dursun Ali; Toprak, Emre; Avcı, Emre; Alp Avcı, Gülçin; Şahin, Onur; Büyükgüngör, Orhan
    Transition metal complexes of arginine (using Co(II), Ni(II), Cu(II) and Zn(II) cations separately) were synthesized and characterized by FTIR, TG/DTA-DrTG, UV-Vis spectroscopy and elemental analysis methods. Cu(II)-Arg complex crystals was found suitable for x-ray diffraction studies. It was contained, one mole CuII and Na+ ions, two arginate ligands, one coordinated aqua ligand and one solvent NO3 - group in the asymmetric unit. The principle coordination sites of metal atom have been occupied by two N atoms of arginate ligands, two carboxylate O atoms, while the apical site was occupied by one O atom for CuII cation and two O atoms for CoII, NiII, ZnII atoms of aqua ligands. Although CuII ion adopts a square pyramidal geometry of the structure. CoII, NiII, ZnII cations have octahedral due to coordination number of these metals. Neighbouring chains were linked together to form a three-dimensional network via hydrogen-bonding between coordinated water molecule, amino atoms and O atoms of the bridging carboxylate groups. CuII complex was crystallized in the monoclinic space group P21, a = 8.4407(5) Å, b = 12.0976(5) Å, c = 10.2448(6) Å, V = 1041.03(10) Å3, Z = 2. Structures of the other metal complexes were similar to CuII complex, because of their spectroscopic studies have in agreement with each other. Copper complex has shown DNA like helix chain structure. Lastly, anti-bacterial, anti-microbial and anti-fungal biological activities of complexes were investigated. Copyright © 2014 The Chemical Society Located in Taipei & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany.