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    1D heteronuclear coordination polymers of hexacyanocobaltate(III) with 2-hydroxymethylpyridine
    (Pergamon-Elsevier Science Ltd, 2024) Kekec, Seray; Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sahin, Onur
    Three new hexacyanocobaltate(III) complexes, {[M 2 (hmpy) 4 Co( mu- CN) 4 (CN) 2 ] center dot 2H 2 O} n (M = Cu(II) ( 1 ), Zn(II) ( 2 ) and Cd(II) ( 3 )) were synthesized with 2-hydroxymethylpyridine (hmpy) ligand, and characterized by vibration (FT - IR and Raman) spectral, single crystal X-ray diffraction (SC-XRD) and powder X-ray diffraction (PXRD), thermal and elemental analyses techniques. The crystallographic analyses revealed that cyanide complexes 1 - 3 are infinite one-dimensional coordination polymers. Each M ion is coordinated by two nitrogen and two oxygen atoms from the hmpy ligands and two nitrogen atoms from the cyanide ligands, displaying a distorted octahedral coordination geometry. Similarly, each Co(III) ion is coordinated by six carbon atoms from cyanide ligands to form a distorted octahedral coordination geometry. These complexes form 3D supramolecular networks through O - H & sdot;& sdot;& sdot; O hydrogen bonds and C - H & sdot;& sdot;& sdot; N interactions. Additionally, structural analyses such as metal salts, pH values of the compounds obtained under different conditions were evaluated. A synthesis -structural analyses relation was made from these data.
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    A new decavanadate polyoxovanadate nanocluster: synthesis, characterization and rapid adsorption of methylene blue
    (Taylor & Francis Ltd, 2017) Naslhajian, Hadi; Amini, Mojtaba; Farnia, S. Morteza F.; Sheykhi, Ayda; Sahin, Onur; Yesilel, Okan Zafer
    A new decavanadate polyoxovanadate nanocluster, [2-ampH](6)[V10O28].2H(2)O (1), was synthesized through reaction between ammonium vanadate and 2-aminopyridine at pH=2. Nanocluster 1 was characterized by IR, elemental analysis, and X-ray crystallography. 1 was found to adsorb and desorb dyes and may have widespread application in wastewater treatment. The utility of 1 for adsorption of methylene blue was studied. The adsorbed dyes can be easily desorbed, and 1 has full efficiency after five cycles. [GRAPHICS] .
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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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    Dinuclear and polynuclear copper(II) complexes with 3,3′-thiodipropionate and unprecedented coordination mode
    (Pergamon-Elsevier Science Ltd, 2014) Arici, Mursel; Yesilel, Okan Zafer; Sahin, Onur; Tas, Murat
    Three new coordination compounds, {[Cu(mu(3)-tdp)(phen)]center dot 2H(2)O} (1), {[Cu(mu(3)-tdp)(bipy)]center dot H2O}(n) (2), [Cu(mu(3)-tdp)(bhen)(4)](NO3)(2)center dot 2H(2)O (3) [tdpH(2) = 3,3'-thiodipropionic acid, phen = 1,10-phenanthroline, bipy = 2,2'-bipyridine] were synthesized and characterized by the IR spectroscopy, elemental analysis, magnetic measurements and single crystal X-ray diffraction. Thermal behaviors and thermochromic properties of the complexes were investigated in detail. Complexes I and 2 are 1D coordination polymers while complex 3 is dinuclear structure. In complexes 1 and 2, the tdp acts as a tridentate bridging ligand to coordinate the two different Cu(H) centers to form 1D chain, which are extended into a 3D networks by hydrogen bonding and pi center dot center dot center dot pi interactions. The 3,3'-thiodipropionate ligand adopts a new coordination mode in 3. Furthermore, complex 3 changed the color from blue to green at 140 degrees C at solid state. (C) 2014 Elsevier Ltd. All rights reserved.
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    Dinuclear zinc(II) complex with tris(2-aminoethyl) amine ligand: synthesis, structure and properties
    (Walter De Gruyter Gmbh, 2015) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sahin, Onur; Sayin, Elvan; Buyukgungor, Orhan
    The dinuclear complex tris(2-aminoethyl) aminezinc(II)-mu-cyanothreecyanozincate(II) hemihydrate, [Zn(tren) Zn(mu-CN)(CN)(3)]center dot 0.5H(2)O (1) (tren = tris(2-aminoethyl)amine), has been synthesized and characterized by spectral (FT-IR and Raman), elemental, thermal analysis (TG, DTG and DTA) as well as single crystal X-ray diffraction techniques. The asymmetric unit is composed of two Zn(II) ions, one tren ligand, four cyanide ligands and a half crystal water molecule which is situated at the special position. Zn1 ion exhibits tetrahedral coordination geometry with four carbon atoms of four cyanide ligands. Zn2 ion is five-coordinated by five nitrogen atoms from one tren and one cyanide ligands in a trigonal bipyramid coordination geometry. The cyanide nitrogen is in the axial position. Adjacent dinuclear units are connected by hydrogen bonding interactions to form three dimensional network. The decomposition reaction takes place in the temperature range 30-700 degrees C in the static air atmosphere.
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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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    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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    Heteronuclear cadmium(II)/cobalt(III) cyanide coordination polymers with 1-methylimidazole and 1-ethylimidazole ligands: synthesis, characterization and activities
    (Elsevier Science Sa, 2025) Kurkcuoglu, Guenes Sueheyla; Kekec, Seray; Yesilel, Okan Zafer; Gokkus, Kutalmis; Unver, Hakan; Sahin, Onur
    Two new heteronuclear Cd(II)/Co(III) compounds, {[Cd(1-meim)3Cd0.5(1-meim)Co(mu-CN)4(CN)2]}n 3 Cd 0 . 5 (1-meim)Co(mu-CN) 4 (CN) 2 ]} n (1) 1 ) and {[Cd(1-etim)3Cd0.5(1-etim)2Co(mu-CN)3(CN)3]& sdot;H2O}n 3 Cd 0 . 5 (1-etim) 2 Co(mu-CN) 3 (CN) 3 ] & sdot; H 2 O} n (2) 2 ) (1-meim: 1-methylimidazole, 1-etim = 1-ethylimidazole), have been synthesized and characterized using elemental analysis, FT-IR and Raman spectroscopy, single-crystal X-ray diffraction techniques. The single crystal X-ray study shows that the compound 1 exhibited a 1D double chain structure and is further linked into 3D supramolecular architectures through C-H & sdot;& sdot;& sdot;N - H & sdot;& sdot;& sdot; N and it & sdot;& sdot;& sdot;it & sdot;& sdot;& sdot; it interactions. Whereas the compound 2 displayed 2D network which is extended into a 3D supramolecular framework by O-H & sdot;& sdot;& sdot;N - H & sdot;& sdot;& sdot; N hydrogen bonds and C-H center dot center dot center dot it - H center dot center dot center dot it interactions. In 1 and 2 , each Co(III) ion is coordinated by six carbon atoms from cyanide ligands, thus showing an octahedral coordination geometry. Cd1 and Cd2 ions exhibited two different geometries, distorted trigonal bipyramidal and octahedral. Furthermore, phase purities, catalytic and thermal properties were investigated.
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    Heteronuclear coordination polymers with imidazole ligand: Synthesis, characterization and alcohol oxidation activities
    (Pergamon-Elsevier Science Ltd, 2024) Kurkcuoglu, Guenes Suheyla; Yesilel, Okan Zafer; Mwanza, Telvin; Kekec, Seray; Unver, Hakan; Sahin, Onur
    Two new heteronuclear Cd(II)/Pd(II) coordination polymers, [Cd2(mu -im)2(Him)4Pd(mu -CN)4]n (1) and [Cd (Him)2Pd(mu -CN)4]n (2) (Him: imidazole), have been synthesized under different conditions and characterized using elemental analysis, thermal analysis, FT-IR and Raman spectroscopy, single-crystal and powder X-ray diffraction techniques. In 1, the Cd(II) ions are bridged by imidazolate ligands to generate 1D chain structure. Neighbouring 1D chains were linked by [Pd(CN)4]2- ions to form 3D framework. In 2, the metal ions are bridged by cyanide ligands to generate 2D [Cd2Pd2(mu -CN)4]n network. Catalytic peroxidative oxidation activity of 1 and 2 was examined on the oxidation of benzyl alcohol using tertiary-butyl hydroperoxide (t-BuOOH) as the oxygen source. The compound 1 exhibited over 90 % product conversion at 80 degrees C in 24-hour reaction time. In addition, the catalyst exhibited high selectivity towards benzaldehyde and no over-oxidation product (benzoic acid) was detected.
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    Heteronuclear Hexacyanometallate(III) Coordination Polymers (Cd/Cr, Cd/Fe, Cd/Co) with 3-(Aminomethyl)pyridine: Synthesis, Characterization, and Catalytic Activities for the Peroxidative Oxidation of Benzylic Alcohols
    (Springer, 2024) Kekec, Seray; Kurkcuoglu, Gunes Suheyla; Unver, Hakan; Sahin, Onur; Yesilel, Okan Zafer
    Three new heteronuclear hexacyanometallate(III) coordination polymers (CPs), [Cd3(mu-3ampy)4(H2O)4Cr2(mu-CN)8(CN)4]n (1), [Cd3(mu-3ampy)2(H2O)2Fe2(mu-CN)5(CN)7]n (2) and [Cd3(mu-3ampy)4(H2O)4Co2(mu-CN)8(CN)4]n (3), were synthesized with 3-(aminomethyl)pyridine (3ampy) ligand. All CPs were characterized by FT-IR, Raman, elemental, thermal analysis as well as single crystal X-ray diffraction and powder X-ray diffraction techniques. The single crystal X-ray diffraction analyses shows that the CPs 1 and 3 are two-dimensional structures, whereas CP 2 is a three-dimensional structure where two adjacent metal ions ions are linked via 3ampy and CN bridges. The coordination spheres of all CPs show distorted octahedral geometries. CP 3 was mainly tested as heterogenous catalyst for peroxidative oxidation of benzyl alcohol and its derivatives (4-chloro, 4-bromo, 4-methyl, 4-metoxy and 4-nitro benzyl alcohol). From the results, the highest aldehyde formation was obtained from the oxidation of benzyl alcohol with overall yield as 100%. In addition, catalytic reactions exhibited high selectivity towards aldehyde and no over-oxidation product (carboxylic acid) was observed.
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    Nine new tetracyanometallate(II) complexes with 2-(2-aminoethyl)pyridine: synthesis, crystal structures and spectroscopic studies
    (Taylor & Francis Ltd, 2022) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sayin, Elvan; Sahin, Onur
    Nine new cyanide complexes, {[Cu(aepy)(2)M(mu-CN)(CN)(3)]center dot 2H(2)O}(n) [M(II) = Ni (1), Pd (2) or Pt (3)], [Zn(aepy)(2)M(mu-CN)(CN)(3)](n) [M = Ni (4), Pd (5) or Pt (6)] and [Cd(aepy)(2)M(mu-CN)(CN)(3)](n) [M(II) = Ni (7) or Pd (8)] and (Haepy)(2)[Pt(CN)(4)] (9) (aepy = 2-(2-aminoethyl)pyridine), were synthesized and characterized structurally using single crystal X-ray diffraction, vibrational spectroscopy, thermal and elemental analyses. The structure analyses revealed that cyanide complexes 1-3 for Cu(II) and 4-6 for Zn(II) are heterobinuclear clusters, whereas the two Cd(II) complexes 7 and 8 are infinite one-dimensional coordination polymers. In heterometallic complexes 7 and 8, the Cd(II) ions are located on a center of symmetry and are coordinated by two nitrogens from cyanide ligands and four nitrogens from aepy ligands, thus showing a distorted octahedral geometry. In 1-9, the intermolecular N-H center dot center dot center dot N hydrogen bonds or/and C-H center dot center dot center dot M interactions (M = Ni(II), Pd(II) and Pt(II)) generate 3D supramolecular networks.
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    One- and three-dimensional silver(I)-5-sulfosalicylate coordination polymers having ligand-supported and unsupported argentophilic interactions
    (Academic Press Inc Elsevier Science, 2014) Arici, Mursel; Yesilel, Okan Zafer; Yesiloz, Yesim; Sahin, Onur
    Four new coordination polymers, namely, {Hemim center dot[Ag(Hssa)(H2O)]}(n) (1), {[Ag(ina)(2) Ag(Hssa)]center dot CH3OH center dot H2O}(n) (2)center dot{[Ag-2(Hssa)(dmP)(1.5)]center dot 2H(2)O}(n) (3) and [Ag-2(Hssa)(daoc)](n) (4) (Hssa: 5-Sulfosalicylate, emim: 2-ethyl-4-methylimidazole, ina: isonicotinamide, dmp: 2,5-dimethylpyrazine and daoc: 1,8-diaminooctane) were synthesized and characterized by IR spectroscopy, elemental analysis, single crystal X-ray diffraction, powder X-ray diffraction (PXRD) and thermal analysis techniques. Complexes 1 and 2 are one-dimensional (1D) coordination polymers while complexes 3 and 4 are threedimensional (3D) coordination polymers. Complex 3 consists of three dimensional (3D) 3,3,6-c net with 3,3,6T37 topology. Complex 4 exhibits a 2-fold interpenetrating 3D framework with tfc topology. Complexes 1-4 contain ligand-supported (1-3) and unsupported (4) argentophilic Ag center dot center dot center dot Ag interactions. Photoluminescence spectra of the complexes demonstrate that photoluminescent properties may be attributed to intraligand transition of coordinated Hssa ligand. (C) 2014 Elsevier Inc. All rights reserved.
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    One-dimensional coordination polymers of copper(II), cobalt(II), zinc(II) and cadmium(II) with glutarate and N-methylimidazole
    (Pergamon-Elsevier Science Ltd, 2014) Yesilel, Okan Zafer; Kilic, Yalcin; Sahin, Onur; Buyukgungor, Orhan
    Four coordination polymers, namely, {[Co(mu-glu)(nmim)(2)]center dot 2H(2)O)(n) (1), [Cu(mu-glu)(nmim)(2)] (2), [[Zn (mu-glu)(nmim)(2)]center dot 2H(2)O), (3) and [Cd(u-glu)(nmim)21 (4) (glu = glutarate, nmim = N-methylimidazole), have been synthesized and characterized by elemental analysis, IR spectroscopy, thermal analysis and single-crystal X-ray diffraction techniques. Moreover, the photoluminescence properties of 3 and 4 have been investigated. Structural analyses reveal that all the complexes exhibit one-dimensional (10) linear chain structures bridged by the glutarate ligand, which further form 3D supramolecular networks via intermolecular it pi center dot center dot center dot pi, C-H center dot center dot center dot pi and weak hydrogen bonding interactions. In the complexes, the glu ligand adopts the bis-monodentate and bis-bidentate bridging modes through two and four carboxylate oxygen atoms, respectively. The distorted octahedral geometry for complexes 2 and 4 and tetrahedral geometry for complexes 1 and 3 are completed by two nmim ligands. Complexes 3 and 4 exhibit a blue emission in the solid state at room temperature. (C) 2013 Elsevier Ltd. All rights reserved.
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    One-pot synthesis of two new metal-organic networks: hydrogen bonded mononuclear Cu(II) complex and mixed-valence Cu(I,II) coordination polymer with encapsulated 14-membered unique water cluster
    (Elsevier Science Bv, 2015) Semerci, Fatih; Yesilel, Okan Zafer; Yuksel, Fatrna; Sahin, Onur
    {[Cu-4(mu-bpe)(4)Cu-2(mu-pydc)(2)(mu(3)-pydc)(2)]center dot 14H(2)O}(n) (1) and [Cu(pydcH)(2)(bpe)(2)] (2) have been solvothermally synthesized by 1,2-bis(4-pyridyl)ethylene (bpe) along with dianionic pyridine-2,3-dicarboxylate (pydc) ligands and characterized by elemental, FT-IR and thermal analyses techniques. In the solvothermal synthesis of complexes, 1 was isolated when the reactor was opened whereas 2 was crystallized after 3 weeks. The X-ray crystallographic studies show that complex 1 exhibits ladder-like structure involving mixed-valence Cu(I,II) which has generated a simultaneous in situ redox reaction and a unique 14-membered water cluster consisting of an eight-membered open-cube hexamer and two cyclic water trimers has been observed in hydrophilic cavities of 1. Supramolecular network of 2, which has proton transfer product of pydcH cations, is formed by O-H center dot center dot center dot N and aromatic interactions. (C) 2015 Elsevier B.V. All rights reserved.
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    Syntheses and characterizations of two-dimensional heteronuclear tetracyanonickelate(II) complexes with 4-ethylpyridine and investigation of the catalytic activity of [Cd(4epy)2Ni(μ-CN)4]n
    (Taylor & Francis Ltd, 2023) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Kekec, Seray; Unver, Hakan; Sahin, Onur
    Three new 2D heteronuclear tetracyanonickelate(II) complexes with 4-ethylpyridine (4epy), [Cu(4epy)(2)Ni(mu -CN)(4)](n) (1), [Zn(4epy)(2)Ni(mu -CN)(4)](n) (2) and [Cd(4epy)(2)Ni(mu -CN)(4)](n) (3), were synthesized and characterized by vibrational (FT-IR and Raman) spectroscopy, elemental and thermal analyses, single crystal (SC-XRD) and powder X-ray diffraction (PXRD) techniques. The single crystal X-ray analysis reveals that each metal ion (Cu(II), Zn(II), and Cd(II)) is coordinated by two nitrogen atoms from 4epy ligands and four nitrogen atoms from cyanide ligands and Ni(II) ions are coordinated by four carbon atoms from cyanide ligands showing a distorted octahedral and square planar coordination geometries, respectively. The most outstanding features of the complexes are the weak intermolecular C-H & sdot;& sdot;& sdot;Ni interactions between the Ni(II) ion and hydrogen atom of the ethyl group of the 4epy ligand. Adjacent 2D structures are further combined by these C-H & sdot;& sdot;& sdot;Ni interactions, generating a 3D network. The heterogeneous catalytic activity of 3 was investigated for oxidation of some primary and secondary aliphatic or aromatic alcohols; no acid formation was observed in some aromatic alcohols after 24 h and 100% aldehyde selectivity was determined.
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    Syntheses, crystal structures, spectroscopic and thermal properties of 3D heteronuclear coordination polymers with 4-ethylpyridine and cyanide ligands
    (Springer/Plenum Publishers, 2024) Kekec, Seray; Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sahin, Onur
    Three new hexacyanometallate(III) complexes, namely {[Cd-3(4epy)(12)Cr-2(mu-CN)(6)(CN)(6)]center dot 4H(2)O}n (1), {[Cd-3(4epy)(12)Fe-2(mu-CN)(6)(CN)(6)]center dot 4H(2)O}n (2) and {[Cd-3(4epy)(12)Co-2(mu-CN)(6)(CN)(6)]center dot 4H(2)O}n (3), were synthesized by using 4-ethylpyridine (4epy) ligand and characterized by spectral (FT-IR and Raman), crystallographic (SC-XRD and PXRD), thermal and elemental analyses techniques. Single crystal studies have shown that heterometallic complexes 1-3 form 3D polymers. Each M ion [M = Cr(III) in 1, Fe(III) in 2 and Co(III) in 3] is coordinated by six carbon atoms from cyanide ligands and adjacent metal ions are bridged by cyanide ligands to generate [Cd6M6(CN)(12)] clusters. Each Cd(II) ion is coordinated by four nitrogen atoms from 4epy ligands and two nitrogen atoms from cyanide ligands to distorted octahedral coordination geometry. In addition, thermal (TG/DTA) properties of the complexes were investigated. Powder X-ray diffraction (PXRD) patterns of the complexes were recorded to control the phase purities.
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    Synthesis and characterization of new coordination polymers based on 2,3-/3,4-pyridinedicarboxylates and bispyridine ligands, with structural diversity
    (Pergamon-Elsevier Science Ltd, 2016) Semerci, Fatih; Yesilel, Okan Zafer; Yuksel, Fatma; Sahin, Onur
    New coordination polymers, formulated as {bpaH(2)[Cu(mu-2,3-pydc)(2)]}(n) (1), [Cd(mu-23-Pydc)(mu-bpa)(0.5)(H2O)(2)](n) (2), {[Co-2(mu(4)-3,4-pydc)(2)(mu-bPe)(H2O)(2)]H2O)(n), (3) and [Cu-2(pic)(4)(mu-4,4'-bipy)}.(4,4'-bipy).2H(2)O (4) have been synthesized based on the bispyridine ligands; 1,2-bis(4-pyridyl)ethane (bpa), 1,2bis(4-pyridyl)ethylene (bpe) and 4,4'-bipyridine (4,4'-bipy) along with dianionic 2,3-and 3,4-pyridinedicarboxylate (2,3-pydc and 3,4-pydc) and mono anionic picolinate (pic) ligands, respectively. All the complexes have been characterized by elemental and IR spectroscopy and single-crystal X-ray diffraction studies. 1 has proton transfer products of bpaH2 cations and shows 1D double chain. Using of the 2,3pydc and 3,4-pydc ligands in 2 and 3 in the presence of Cd(II) and Co(II) ions generate 1D 2D inclined polycatenated structure in 2 and 4,5 connected {4(4).6(2).10(4)}{4(4).6(2)) 4,5T6 topology in 3, respectively. The picolinate ligand in dinuclear structure of 4 was occurred by partial decarboxylation of 2,3-pydcH(2) in the process of the solvothermal reaction. 4,4'-Bipyridine molecules act as both a template via rare weak C-H center dot center dot center dot N interaction and a bridge between Cu(II) centers in the self-assembly process of supramolecular structure of 4. Thermal decomposition behavior of complexes and luminescent property of 2 are also presented herein. (C) 2016 Elsevier Ltd. All rights reserved.
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    Synthesis and structural analysis of heteronuclear hexacyanochromate(III) complex with tris(2-aminoethyl)amine), [Cd(tren)(Htren)][Cr(CN)6]•2H2O
    (Elsevier, 2020) Kurkcuoglu, Gunes Suheyla; Yesilel, Okan Zafer; Sayin, Elvan; Enonlu, Emir; Sahin, Onur
    The synthesis and structural investigation of a new heteronuclear hexacyanochromate(III) complex based on amine containing tetradentate ligand tris(2-aminoethyl)amine ligand (tren) are reported. The complex was characterized by spectral (FT-IR and Raman), elemental, thermal analysis (TG, DTG and DTA) as well as single crystal X-ray diffraction (SC-XRD) techniques. From elemental and spectral data, the formulae, [Cd(tren)(Htren)][Cr(CN)(6)]center dot 2H(2)O (1), for the metal complex has been proposed. Single crystal X-ray diffraction (SC-XRD) measurement showed that the asymmetric unit of 1 consists of one Cd(II) ion, one Cr(III) ion, six cyanide ligands, one tren and one Htren ligands and two crystal water molecules. The structure of 1 presents one of tren ligands was protonated and the coordinated to Cd(II) ion as a monodentate ligand. Other tren ligand was also bonded to Cd(II) ion as a tetradentate ligand to form a distorted trigonal-bipyramidal geometry. In the crystal structure, Cr(III) ion is coordinated by six carbon atoms from six different cyanide ligands, thus showing a distorted octahedral coordination geometry. In 1, The FT-IR and Raman spectral data of the complex compared with the crystallographic data, the results appear to be consistent with each other. Thermal properties of the title complex were investigated by thermogravimetric analysis (TG/DTG/DTA) in the temperature range of 30-700 degrees C in air atmosphere. (C) 2020 Elsevier B.V. All rights reserved.
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    Synthesis, characterization and crystal structures of heteronuclear coordination polymers with 4-methylpyridine
    (Springer/Plenum Publishers, 2024) Kekec, Seray; Kurkcuoglu, Guenes Suheyla; Sahin, Onur; Yesilel, Okan Zafer
    In this study, four new heteronuclear hexacyanoferrate(III) and hexacyanocobaltate(III) complexes, namely, [Cu2(4mpy)2Cu(4mpy)2(EtOH)2Co2(mu-CN)8(CN)4]n (1), [Zn2(4mpy)2Zn(4mpy)2Co2(mu-CN)10(CN)2]n (2), [Cd2(H2O)8Cd(4mpy)2Co2(mu-CN)8(CN)4]n (3) and [Cd3(4mpy)12Fe2(mu-CN)6(CN)6]n (4), were synthesized using 4-methylpyridine (4mpy) ligand. All complexes were investigated using single-crystal X-ray diffraction (SC-XRD), vibration (FT-IR and Raman) spectra and elemental and thermal analysis techniques. In addition, powder X-ray diffraction (PXRD) patterns were performed to verify the phase purity of the complexes. Crystallographic analyses reveal that complexes 1, 2 and 4 exhibit 2D structure while complex 3 exhibits 1D structure. Also, the 3D supramolecular structures of the complexes 1-4 formed through intermolecular C-H center dot center dot center dot N, O-H center dot center dot center dot N or O-H center dot center dot center dot O hydrogen bonding.
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    Synthesis, crystal structure and spectroscopic investigations of heteronuclear Co(III)/Cu(II), Co(III)/Cd(II) and Fe(III)/Cd(II) 3D coordination polymers with 4-(2-aminoethyl)pyridine
    (Elsevier, 2023) Kurkcuoglu, Gunes Suhelyla; Yesilel, Okan Zafer; Kekec, Seray; Sahin, Onur
    The cyanide complexes of transition metals with 4-(2-aminoethyl)pyridine (4aepy) of {[Cu(H2O)(mu-4aepy)Cu(mu-4aepy) 2Cu(mu-4aepy)Co2(mu-CN)6(CN)6]middot3H2O}n ( 1 ), (NH4 )[Cd(mu-4aepy)2Co(mu-CN)2 (CN)4 ] n ( 2 ) and (NH4 )[Cd(mu-4aepy)2Fe(mu-CN)2(CN)4]n ( 3 ) were synthesized and investigated by vibrational (FT-IR and Raman), powder X-ray diffraction (PXRD), elemental and thermal analysis techniques. The crystal struc-tures of the complexes have been determined by the single crystal X-ray diffraction (SC-XRD) patterns. The crystallographic analysis reveals that complex 1 crystallizes in the monoclinic system, space group P2 1 , whereas; complexes 2 and 3 crystallize in the tetragonal system, space group P42/ncm. The asym-metric unit of heterometallic complex 1 consists of three Cu(II) ions, two Co(III) ions, four 4aepy ligands, twelve cyanide ligands, one aqua ligand and three non-coordinated water molecules. The asymmetric unit of heterometallic complexes 2 -3 consists of one Cd(II) ion, one M ion [M = Co(III) in 2 and Fe(III) in 3 ], two cyanide ligands, half 4aepy ligand and one ammonium ion. Each Cd(II) ion is located at a center of symmetry and is coordinated by two nitrogen atoms by the cyanide ligands and by four nitrogen atoms by the 4aepy ligands. As a result, they show distorted octahedral coordination geometries. In complex 1 , the intermolecular O-H center dot center dot center dot N, N-H center dot center dot center dot N, N-H center dot center dot center dot O and C-H center dot center dot center dot N hydrogen bonds and C equivalent to N center dot center dot center dot pi and pi center dot center dot center dot pi in-teractions play a crucial role in the architecture of 3D network. The intermolecular C equivalent to N middotmiddotmiddot pi interaction between cyanide ligand and pyridine ring of the 4aepy ligand is the most striking feature of complex 1 . Heterometallic complexes 2-3 have 3D coordination polymers.(c) 2022 Elsevier B.V. All rights reserved.