Yazar "Bicer, Figen Arslan" seçeneğine göre listele

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    Cadmium(II) coordination polymers based on 3,3'-azobis(pyridine) and some aliphatic dicarboxylates: Hydrothermal synthesis, crystal structures, thermal stabilities and photoluminescence
    (Pergamon-Elsevier Science Ltd, 2023) Bicer, Figen Arslan
    Three new Cd(II) coordination polymers (CPs), namely, [Cd-2(mu-phsuc)(2)(mu-abpy)(2)(H2O)(2)](n) (1), {[Cd(mu(3)-glu) (mu-abpy)]center dot 3H(2)O}(n) (2) and {[Cd(mu-dmglu)(mu-abpy)(H2O)]center dot H2O}(n) (3), were synthesized by hydrothermally from 3,3'-azobis(pyridine) (abpy) using three different aliphatic dicarboxylic acids [phenyl succinic acid (phsucH(2)), glutaric acid (gluH(2)) and 3,3'-dimethyl glutaric acid (dmgluH(2))]. The structures of 1-3 were characterized by elemental analysis, infrared spectroscopy (IR), single crystal X-ray and powder X-ray diffraction (PXRD) techniques. X-ray diffraction studies have revealed that 1-3 crystallize in the monoclinic system, P21/n space group (1) and C2/c space group (2, 3). 1 and 2 show 3D structure, whereas 3 exhibits an interesting 2-fold interpenetrating 2D structure. The thermal stabilities of the CPs were studied by thermal analysis (TG/DTA) techniques. In addition, the photoluminescence properties of the CPs have been investigated.
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    Copper(II) and Zinc(II) coordination polymers based on glutaric acid and 1,2-bis(4-pyridyl)ethylene: Hydrothermal synthesis, characterization and thermal behaviors
    (Elsevier, 2023) Bicer, Figen Arslan; Coskum, Ferihan Tatas; Salun, Busra; Ozdemir, Ilknur; Arici, Mursel
    1,2-bis(4-pyridyl)ethylene (dpe) and glutaric acid (H2glu) with Cu(II) and Zn(II) afforded two coordination polymers namely, [Cu(mu 3-glu)(mu-dpe)]n (1) and [Zn(mu 3-glu)(mu-dpe)0.5]n (2), and they were characterized by elemental analysis, IR spectroscopies, single crystal X-ray diffraction and powder X-ray diffraction (PXRD) techniques. X-ray diffraction studies have shown that complex 1 crystallizes in the triclinic system, in the P-1 space group, while complex 2 crystallizes in the C2/c space group in the monoclinic system. In complexes 1 and 2, the glu ligand adopts tetradentate coordination mode that one carboxylate group bidentate, other carboxylate group bis(monodentate)-bridging. Complex 1 displayed 2D network with {44.62} point symbol and sql topology which is extended into a 3D supramolecular framework by C- HMIDLINE HORIZONTAL ELLIPSISO hydrogen bonds interactions. Complex 2 featured a 3D network that two identical 3D self-penetrating frameworks interpenetrate each other in a 2-fold (3D+3D -> 3D) mode, with a pcu; 6/4/c1; sqc1 topology with the point symbol of {412.63}. The optical band gap energy values calculated by the Kubelka-Munk function for 1 and 2 observed at 3.20 and 3.24 eV, respectively. Moreover, the thermal properties of the complexes were investigated in the study.
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    New saccharinate complexes with 3,3-azobispyridine ligand: synthesis, characterization, and spectroscopic properties
    (Taylor & Francis Ltd, 2017) Bicer, Figen Arslan; Yildirim, Semiha; Kaim, Wolfgang; Bubrin, Martina
    The new metal complexes with saccharinate (sac) and 3,3-azobispyridine (3,3-abpy), [Ni(H2O)(4)(3,3-abpy)(2)](sac)(2) (1), [Cu(sac)(2)(H2O)(-3,3-abpy)](n) (2), [Zn(H2O)(4)(3,3-abpy)(2)](sac)(2) (3), [Cd(sac)(2)(H2O)(2)(-3,3-abpy)](n) (4), and [Hg-2(-sac)(2)(sac)(2)(-3,3-abpy)(3,3-abpy)(2)](n) (5), were synthesized and characterized by IR spectra, elemental analysis, and single-crystal X-ray diffraction. Spectroscopic (UV-vis and photoluminescence) and thermal properties were also investigated. Single-crystal X-ray analysis reveals that Ni(II) and Zn(II) are coordinated by four aqua ligands and two nitrogens of 3,3-abpy, while sac is a counter-ion in 1 and 3. In 2, Cu(II) and all ligands are linked by coordination bonds and 3,3-abpy ligands connect the Cu(II) centers forming a 1-D coordination polymer. In 4, sac N-coordinated to Cd(II) and distorted octahedral geometry of Cd(II) ion is completed by two aqua and bridging 3,3-abpy ligands. In 5, sac bridges two Hg(II) ions to generate dinuclear [Hg-2(-sac)(2)] units. These dinuclear units are connected by 3,3-abpy to form a 1-D coordination polymer. The photoluminescence spectra of 3 and 5 show blue fluorescent emission bands, and these emissions can probably be assigned to intraligand fluorescent emissions. Thermal decompositions of the compounds are also discussed. For all complexes, magnetic susceptibility measurements show expected magnetic behavior. [GRAPHICS]
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    Syntheses, characterization of three new cobalt(II) complexes with 2-phenylsuccinic acid and flexible bis(imidazole) linkers
    (Elsevier, 2023) Bicer, Figen Arslan; Arici, Mursel; Yesilel, Okan Zafer
    Bis(imidazole) derivatives (obix, mbix, pbix = 1,2-/1,3-/1,4-bis((imidazol-1-yl)methyl)benzene) with Co(II) and flexible 2-phenyl succinic acid (phsucH2) afforded three coordination polymers namely, [Co(mu-phsuc)(mu-obix)]n ( 1 ), {[Co(mu-phsuc)(mu-mbix)] center dot H2O}n ( 2 ), {[Co(mu 4-phsuc)(mu-pbix)0.5] center dot H2O}n ( 3 ) and they were characterized by elemental analysis, magnetic susceptibility, solid-state UV-Vis. and IR spectro-scopies and single crystal X-ray diffraction techniques. The phase purities of the complexes were con-firmed by powder X-ray diffraction analysis. X-ray diffraction studies have shown that compounds 1 and 2 crystallize in the monoclinic system, in the P21/c space group, while compound 3 crystallizes in the P-1 space group in the triclinic system. In all compounds, bis(imidazole) ligands act as bis(monodentate), whereas 2-phenylsuccinate ligands act as both monodentate and bidentate bridges in 1 , bis(monodentate) bridges in 2 , tetrakis(monodentate) bridges in 3 . The complexes displayed 2D layer structures and adja-cent 2D layers are joined by C-H center dot center dot center dot 7r interactions in 1 , weak C-H center dot center dot center dot O interactions in 2 , 7r center dot center dot center dot 7r stacking and weak C-H center dot center dot center dot 7r interactions in 3 to form a 3D supramolecular network. The contribution of the binding positions of the imidazole groups to the phenyl ring in bis(imidazole) ligands to the structure and struc-tural diversity are also discussed. In addition, the thermal properties of the compounds were investigated in the study.(c) 2023 Elsevier B.V. All rights reserved.
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    Voltammetric Investigations of 2,2?-Azobispyridine Zinc(II) and Nickel(II) Complexes
    (Elsevier, 2015) Karaman, Yeliz; Menek, Necati; Bicer, Figen Arslan; Olmez, Halis
    The electrochemical behaviour of 2,2'-Azobispyridine (abpy) has been studied by using voltammetric techniques. From obtained data, electrochemical reaction mechanism of the azo compound has been suggested. At the same time, zinc(II) and nickel(II) complexes of the azo compound have been investigated in different solution media. 50% ethanol-50% KNO3 (0.1M) medium has been chosen as optimum solution medium. The composition of the zinc(II) and nickel(II) abpy complexes has been determined to be 1:2. The optimum conditions favoring the formation of complexes were studied and their stability constants were determined by using square-wave voltammetric technique.