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    Design and construction of six coordination polymers with imidazole-4,5-dicarboxylate ligand
    (Elsevier Science Sa, 2015) Erer, Hakan; Yesilel, Okan Zafer; Sahin, Onur; Buyukgungor, Orhan
    Six new metal-organic frameworks based on a rigid multifunctional ligand imidazole 4,5-dicarboxylic acid (H(3)idc), namely, [Zn-3(mu(3)-idc)(mu(5)-idc)](n) (1), {[Zn-3(mu(3)-idc)(2)(H2O)(dpeten)](n)center dot 2H(2)O}(n) (2), [Zn(mu-Hidc)-( mu-obix)(0.5)](n) (3), [Zn-4(mu-Hidc)(4)(mu-mbix)(2)](n) (4), {[Cd-5(mu(5)-idc)(2)(mu(4)-Hidc)(2)(H2O)(2)]center dot 2H(2)O}(n) (5) and [Cd-2(mu(3)-Hidc)(2)(mu-obix)](n) (6) (H(3)idc = imidazole-4,5-dicarboxylic acid, obix = 1,2-bis(imidazol-1-yl-methyl)-benzene, mbix = 1,3-bis(imidazol-1-yl-methyl)-benzene and dpeten = 1,2-di(pyridin-4-yl)ethene), have been constructed under hydro(solvo)thermal conditions and structurally characterized by elemental analysis, IR spectroscopy, single-crystal X-ray diffraction, powder X-ray diffraction (PXRD) and thermal analyses (TG, DTA, DSC) techniques. In these compounds, the ligand, H(3)idc, exhibits different coordination modes, constructing various architectures by bridging a variety of metal ions or polynuclear clusters. All of these coordination polymers exhibited intense fluorescent emissions in the solid state at room temperature. Furthermore, topological properties were studied. (C) 2015 Elsevier B.V. All rights reserved.
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    Synthesis and characterization of new Ag(I) coordination networks based on saccharinate and bis(isopropylimidazole) ligands exhibiting very close C-H...Ag interactions
    (Pergamon-Elsevier Science Ltd, 2017) Semerci, Fatih; Sahin, Onur; Erer, Hakan
    Two Ag(l) coordination networks, formulated as [Ag(sac)(mu-bisopib)](n) (1) and [Ag(sac)(mu-pbisopix)].H2O (2), have been synthesized based on the bis(isopropylimidazole) ligands 1,4-bis(2-isopropyl-1H-imidazol-1-yl)butane (bisopib) and 1,4-bis((2-isopropyl-1H-imidazol-1-yl)methyl)benzene (pbisopix), respectively, along with saccharinate (sac) ligands. All the complexes were characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction studies. The X-ray crystallographic studies of 1 and 2 revealed that the Ag(I) ions are mu-bridged by the bis(isopropylimidazole) derivative ligands to generate 1D zig-zag polymer and dinuclear structures, respectively. As far as we know, complex I shows the closest C-H...Ag interaction distance among similar literature examples. In complex 1 adjacent 1D coordination polymers are further joined by C-H...O hydrogen bonds and pi...pi interactions, generating a 3D supramolecular network. The C-H...O hydrogen bonds and C-H...pi interactions play a crucial role in the architecture of the 3D network of complex 2. Thermal decompositions and photoluminescent properties of the Ag(I) complexes are also discussed herein. (C) 2016 Elsevier Ltd. All rights reserved.
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    Öğe
    Zinc(II) and Cadmium(II) coordination polymers constructed from phenylenediacetate ligands
    (Academic Press Inc Elsevier Science, 2016) Sezer, Gunes Gunay; Yesilel, Okan Zafer; Erer, Hakan; Sahin, Onur
    A series of new coordination polymers {[Zn(mu-opda)(mu-bpa)] center dot 2H(2)O}(n), (1), [Zn(mu(3)-ppda)(mu-bpa)](n) (2), [Cd(mu(3)-ppda)(mu-bPa)](n) (3), [Cd(mu(3)-mPda)(mu-bpa)](n), (4) and [Cd(mu(3)-mpda)(mu-bipy)](n) (5), (o/m/ppda=1,2/1,3/1,4-phenylenediacetate, bpa=1,2-bi(4-pyridyl)ethane, bipy=4,4'-bipyridine) were synthesized. Their structures were characterized by elemental analysis, IR spectroscopy, single-crystal and powder X-ray diffraction. Furthermore, the effect of metal sources (zinc acetate and zinc oxide) and acidity of the solution on the structure of the coordination polymers was discussed for complexes 1 and 5, respectively. The single-crystal X-ray crystallographic studies revealed that complexes 1, 3, 4 and 5 are uninodal (4) connected 2D frameworks and display sql topology with the point symbol of (4(4).6(2)). Complex 2 is 3D coordination polymer and exhibits pcu topology with the point symbol of (4(12).6(3)). In addition, the luminescent properties and thermal behavior of all complexes were also investigated. (C) 2015 Elsevier Inc. All rights reserved.