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    Facile synthesis of 2D Zn(II) coordination polymer and its crystal structure, selective removal of methylene blue and molecular simulations
    (Elsevier, 2017) Sezer, Gunes Gunay; Yesilel, Okan Zafer; Sahin, Onur; Arslanoglu, Hasan; Erucar, Ilknur
    A new coordination polymer {[Zn(mu(3)-ppda)(H2O)(mu-bpa)Zn(mu-ppda)(mu-bpa)]center dot 4H(2)O)(n) (1) (ppda = 1,4-phenylenediacetate, bpa = 1,2-bis(4-pyridyl)ethane) has been synthesized by microwave-assisted reaction and characterized by elemental analysis, IR spectroscopy, single-crystal and powder X-ray diffractions. The asymmetric unit of 1 consists of two Zn(II) ions, two bpa ligands, two ppda ligands, one coordinated and four non-coordinated water molecules. In 1, ppda(2-) anions are linked the adjacent Zn(II) centers to generate 1D double-stranded chains. These chains are connected into 2D sheets by the bridging bpa ligands. Atomically detailed modeling was performed to compute single and binary component adsorption isotherms of H-2, CO2, CH4 and N-2 in complex 1. Results showed that 1 exhibits a high adsorption selectivity towards CO2 due to its high affinity for CO2. Results of this study will be helpful to guide the microwave-assisted reaction of coordination polymers to design promising adsorbents for gas storage and gas separation applications. The luminescent property of 1 and the selective removal of dyes in I have been also discussed. Results showed that 1 can be a potential candidate for luminescence applications and can selectively adsorb methylene blue (MB) dye molecules. (C) 2017 Elsevier B.V. All rights reserved.
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    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.
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    Öğe
    Zinc(II) and cadmium(II) coordination polymers containing phenylenediacetate and bis(imidazol-1-ylmethyl)benzene linkers: The effect of ligand isomers on the solid state structures
    (Academic Press Inc Elsevier Science, 2017) Sezer, Gunes Gunay; Yesilel, Okan Zafer; Sahin, Onur; Burrows, Andrew D.
    This work presents a systematic investigation of the reactions of o-, m- and p-phenylenediacetic acid with Zn(II)/Cd(II) salts in the presence of different semi-rigid o-, m- and p-bis(imidazol-1-ylmethyl)benzene co-ligands. Fourteen new coordination polymers - {[Zn(mu-opda)(mu-mbix)]center dot 0.5H(2)O}(n) (1), {[Zn(mu-mpda)(mu-obix)]center dot H2O}(n) (2), {[Zn-2(mu-mpda)(2)(mu-mbix)(2)]center dot 5H(2)O}(n) (3), {[Zn(mu-mpda)(mu-mbix)]center dot 2H(2)O}(n) (4), {[Zn(mu-mpda)(mu-pbix)]center dot 0.5H(2)O}(n) (5), [Zn(mu-ppda)(mu-obix)](n) (6), {[Zn(mu-ppda)(mu-mbix)]center dot 0.5H(2)O}(n) (7), {[Zn(mu-ppda)(mu-pbix)]center dot H2O center dot DMF}(n) (8), {[Cd(mu-mpda)(mu-obix)(1.5)]center dot H2O}(n) (9), {[Cd(mu-mpda)(mu-obix)]center dot H2O}(n) (10), {[Cd(mu-mpda)(mu-mbix)(H2O)]center dot H2O}(n) (11), [Cd(mu(3)-ppda)(mu-obix)](n) (12), [Cd(mu(3)-ppda)(mu-mbix)](n) (13) and [Cd(mu(3)-ppda)(mu-pbix)](n) (14) (o/m/ppda=1,2/1,3-/1,4-phenylenediacetate, o/m/pbix=1,2-/1,3-/1,4-bis(imidazol-1-ylmethyl) benzene) - have been prepared and structurally characterized. Two of the complexes were found to possess one-dimensional (1D) structures, eleven complexes were found to be two-dimensional (2D) coordination networks and one of the complexes was found to be a three-dimensional (3D) coordination network. Of the 1D structures, 3 forms nanotubes, whereas in 8 pairs of pbix ligands bridge the zinc(II) centers to generate Zn-2(pbix)(2) dimers, which in turn are linked together by pairs of ppda linkers to give chains. Compound 5 contains a 4-fold interpenetrated 3D framework. The structure of 10 contains interpenetrated 2D frameworks, leading to a three-dimensional gross structure. The thermal stabilities and luminescent properties for 1-14 are also reported.