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    Öğe
    Gas adsorption/separation properties of metal directed self-assembly of two coordination polymers with 5-nitroisophthalate
    (Academic Press Inc Elsevier Science, 2014) Arici, Mursel; Yesilel, Okan Zafer; Keskin, Seda; Sahin, Onur
    Two new coordination polymers, namely, [Co(mu-nip)(mu-bpe)] (n) and [Zn(mu-nip)(mu-bpe)](n) (2) (nip: 5-nitroisophthalate, bpe: 1,2-bis(4-pyridyl)ethane) were hydrothermally synthesized and structurally characterized by single crystal X-ray diffraction, IR spectroscopy, elemental analysis and thermal analysis. Moreover, atomically detailed simulation studies of complex 2 for CO2/CH4 adsorption and separation were performed. Complex 1 consists of two dimensional (2D) (4,4) grid networks with the point symbol of 4(4).6(2). Complex 2 exhibits a 3-fold interpenetrating 3D framework with 6(5).8-dmp topology. Thermal properties of the complexes showed that both complexes were stable over 320 C. Simulation studies demonstrated that complex 2 can separate CO2 from CH4 at low pressures at 273 K. (C) 2013 Elsevier Inc. All rights reserved.
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    Öğe
    The synthesis, characterization, and theoretical hydrogen gas adsorption properties of copper(II)-3,3′-thiodipropionate complexes with imidazole derivatives
    (Taylor & Francis Ltd, 2013) Arici, Mursel; Yesilel, Okan Zafer; Keskin, Seda; Sahin, Onur; Buyukgungor, Orhan
    Three new coordination polymers, [Cu((3)-tdp)(im)(2)](n) (1), {[Cu((3)-tdp)(1-mim)(2)]0.5H(2)O}(n) (2) and {[Cu-2((3)-tdp)(2)(4-mim)(4)]H2O}(n) (3) [tdpH(2)=3,3-thiodipropionic acid, im=imidazole, 1-mim=1-methylimidazole and 4-mim=4-methylimidazole], have been prepared and characterized by spectroscopic techniques (IR and UV-Vis), elemental analyzes, magnetic measurements, thermal analyzes, and single-crystal X-ray diffraction. Complexes 1-3 crystallize in the monoclinic system with space groups of C2/c and P2(1)/c, respectively. In 1-3, tdp is a bridging ligand to form 1-D chains, which are extended into a 2-D layer by hydrogen bonding and interactions. The 3,3-thiodipropionate exhibits an unexpected coordination mode in 1-3. Simulations were used to assess the potential of the complexes in H-2 storage applications.