Yazar "Sariboga, Bahtiyar" seçeneğine göre listele

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    A disparate 3-D silver(I) coordination polymer of pyridine-3,5-dicarboxylate and pyrimidine with strong intermetallic interactions: X-ray crystallography, photoluminescence and antimicrobial activity
    (Taylor & Francis Ltd, 2015) Alisir, Sevim Hamamci; Demir, Serkan; Sariboga, Bahtiyar; Buyukgungor, Orhan
    A polymeric silver(I) complex, [Ag-4(-pydc)(2)(-pm)(2)](n) (1) (pydc=pyridine-3,5-dicarboxylate and pm=pyrimidine), has been synthesized and characterized by elemental analysis, IR spectroscopy, thermal analysis, and single-crystal X-ray diffraction. X-ray crystallographic data of 1 revealed that pydc exhibits two different coordinaton modes that play a key role in the construction of the 3-D crystal network including Ag-carboxylate clusters in which close Ag-Ag distances exist. The magnitudes of close Ag-Ag interactions in second-order energy (E-2) have been revealed by natural bond orbital analysis performed with single point energy calculation using the experimental geometry of 1. Furthermore, the luminescent properties of 1 show strong fluorescence with two emission maxima in the visible region. Also, 1 has antifungal activity on Candida albicans (MIC value, 4gmL(-1)) and good antibacterial activity on micro-organisms (MIC value, 64-256gmL(-1)).
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    A New Photoluminescent and Antibacterial Polymeric Silver(I) Complex Generated from Pyridine-2,3-dicarboxylic Acid
    (Springer, 2013) Alisir, Sevim Hamamci; Sariboga, Bahtiyar; Topcu, Yildiray; Yang, Shi-Yao
    A new two-dimensional polymeric [Ag-2(mu-Hpydc)(2)(mu-pyz)](n) (1) (H (2) pydc = pyridine-2,3-dicarboxylic acid, pyz = pyrazine), has been synthesized and characterized by elemental analysis, IR spectroscopy, thermal analysis and single crystal X-ray diffraction. X-ray diffraction analyses show that Hpydc exhibits novel coordination mode in 1, acts as a bridging ligand between two Ag(I) centers via deprotonated carboxylate mu-O1 atoms, forming binuclear [Ag-2(mu-Hpydc)(2)] units (Ag center dot center dot center dot Ag separation is 2.9482(4) ). These units are connected to each other through pyz and Hpydc ligands, leading to two-dimensional polymeric structure. The coordination geometry around the silver(I) ions in the complex is a highly distorted square-pyramidal (tau = 0.229) with an AgN2O3 chromospheres. The solid state photoluminescence properties of 1 and H (2) pydc have been studied at room temperature. Furthermore, the complex has been tested for its in vitro antibacterial activity and is determined to be highly effective for antibacterial activity against Gram-positive and Gram-negative pathogenic bacteria cells. A new polymeric 2D silver(I) complex [Ag-2(mu-Hpydc)(2)(mu-pyz)](n) (1) (H (2) pydc = pyridine-2,3-dicarboxylic acid, pyz = pyrazine) has been synthesized and characterized by elemental analysis, IR spectroscopy, thermal analysis and single crystal X-ray diffraction. The solid state photoluminescence properties of 1 and H (2) pydc have been studied at room temperature and also it has been tested for its in vitro antibacterial activity.
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    Mono and dinuclear copper(II) naproxenato complexes containing 3-picoline and 4-picoline: synthesis, structure, properties, catechol oxidase, and antimicrobial activities
    (Taylor & Francis Ltd, 2014) Caglar, Sema; Adiguzel, Ekrem; Sariboga, Bahtiyar; Temel, Ersin; Buyukgungor, Orhan
    Mononuclear and dinuclear copper(II) complexes [Cu-2(mu-nap)(4)(3-pic)(2)] (1) and [Cu(nap)(2)(H2O)(4-pic)(2)] (2) have been synthesized in the presence of 3-picoline and 4-picoline. Two complexes were characterized by FT-IR, UV-vis spectroscopic methods and their thermal stabilities were determined by TG/DTA/DTG techniques. The crystal structures of 1 and 2 were established by X-ray analysis. X-ray structure analysis has shown that copper(II) has a distorted square-pyramidal geometry. Naproxenate is a bridging ligand in 1 and monodentate in 2. Two complexes have shown catalytic activity on oxidation of 3,5-di-tert-butylcatechol to 3,5-di-tert-butylquinone exhibiting saturation kinetics at high substrate concentrations. The complexes were also screened for antimicrobial activity against pathogenic bacteria and fungi. The complexes exhibited antimicrobial activity against Entrococcus faecalis and Candida albicans.
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    Structural, spectral, optical and antimicrobial properties of synthesized 1-benzoyl-3-furan-2-ylmethyl-thiourea
    (Elsevier, 2013) Karipcin, Fatma; Atis, Murat; Sariboga, Bahtiyar; Celik, Hasan; Tas, Murat
    The 1-benzoyl-3-furan-2-ylmethyl-thiourea (bftu) was synthesized and its structure was determined by elemental analyses, IR spectroscopy, H-1 and C-13 NMR spectroscopy and single crystal X-ray diffraction analysis. Also its antimicrobial activity was determined. We analyzed the optimized geometric structure and energies of bftu in the ground state as theoretically. Theoretical calculations were performed at the DFT level. Selected experimental bands were assigned and characterized on the basis of the scaled theoretical wavenumbers by their total energy distribution (TED). The nuclear magnetic resonance (NMR) chemical shifts of bftu molecule were calculated using the gauge-invariant-atomic orbital (GIAO) method in acetone solution and compared with the experimental data. The dipole moment, linear polarizability and first hyper polarizability values were also computed. (c) 2013 Elsevier B.V. All rights reserved.
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    Synthesis and Characterization of Novel Organocobaloximes as Potential Catecholase and Antimicrobial Activity Agents
    (Wiley-V C H Verlag Gmbh, 2013) Erdem-Tuncmen, Mukadder; Karipcin, Fatma; Sariboga, Bahtiyar
    An asymmetric, potentially bidentate dioxime ligand (H2L) was formed by condensation of 4-biphenylchloroglyoxime and napthyl-1-amine. Two equivalents of H2L were reacted with CoCl(2)6H(2)O under appropriate conditions with deprotonation of the dioxime ligand. A series of new organocobaloxime derivatives of the type [CoR(HL)(2)Py], [CoRL2PyB2F4], and [CoRL2Py(Cu(phen))(2)] (H2L=4-(napthyl-1-amino)biphenylglyoxime; phen=1,10-phenathroline; R=izopropyl and benzyl; Py=pyridine) were synthesized. The products were characterized by elemental analysis, molar conductance, FT-IR, H-1 NMR, and magnetic susceptibility measurements. Catecholase-like activity properties of all complexes were also studied. All complexes are catalysts for the oxidation of 3,5-di-tert-butylcatechol to 3,5-di-tert-butyl-1,2-benzoquinone in methanol. Antimicrobial activity studies of H2L and the six complexes were carried out on standard strains (human pathogenic) of bacteria (Staphylococcus aureus, methicillin-resistant S. aureus (MRSA), Bacillus cereus, Enterococcus faecalis, Streptococcus pneumoniae, Listeria monocytogenes, Bacillus subtilis, Escherichia coli, Pseudominas aeruginosa, Salmonella typhi) and the yeast Candida albicans. The compounds showed a significant inhibition of the growth of the Gram-positive bacteria tested. Among the tested microorganisms, S. aureus was the most sensitive strain, especially to H2L and its complexes.
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    Synthesis, characterization, photoluminescent properties and antimicrobial activities of two novel polymeric silver(I) complexes with diclofenac
    (Elsevier, 2017) Alisir, Sevim Hamamci; Sariboga, Bahtiyar; Caglar, Sema; Buyukgungor, Orhan
    Two novel silver(l) complexes with diclofenac, ({2-(2,6-dicholoroanilino)phenylacetic acid} = did) namely [Ag(dicl)](n) (1) and [Ag(dicl)(bipy)](n) (2) (bipy: 4,4'-bipyridine), have been synthesized and characterized by elemental analysis, IR spectroscopy, thermal analysis and single-crystal X-ray diffraction. X-ray crystallographic data of 1 revealed that did anion adopts a mu(3)-eta(1),eta(2) coordinated mode link three Ag atoms generate 1D infinite chain structure. In 2, did ligand plays crucial role to form double ladder chain structure, clamping two neighboring [Ag(mu-bipy)](infinity), chains by using carboxylate oxygen atoms (O1, O2). The most interesting structural feature of 2 is the presence of strong pi center dot center dot center dot pi interactions between aromatic phenyl rings of did placed in the adjacent 1D chains, leads to forming 2D slab structure. The coordination modes of did in the title complexes are supported by using IR spectroscopy. Thermal stabilities of 1 and 2 have been determined by TG/DTA/DTG techniques. The luminescent properties of complex 1 and 2 have been investigated in the solid state at room temperature. Furthermore, the title complexes have been tested for their in vitro antibacterial activities and are determined to be highly effective for antibacterial activity against Gram(+) and Gram(-) pathogenic bacteria cells. 1 and 2 showed activity on Fungi, as well. (C) 2016 Elsevier B.V. All rights reserved.