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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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    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.