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    Öğe
    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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    Öğe
    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.
  • [ X ]
    Öğe
    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.