Two new complexes, [Co(3-fba)2(na)2(H2O)2] (1) and [Ni(3-fba)2(na)2(H2O)2] (2) (where 3-fba = 3-fluorobenzoate and na = pyridine-3-carboxamide, nicotinamide), were synthesized
and characterized using different techniques (elemental analysis, FT-IR, UV-Vis spectrophotometer, single-crystal X-ray diffraction, fluorescence spectroscopy, and TGA/DTA analysis). X-ray structural analysis revealed that 1 and 2 are isostructural and exhibit distorted octahedral
coordination geometry. In each molecule, metal atoms (Co+2 and Ni+2) are linked by two 3-fluorobenzoate anions, two pyridine-3-carboxamide ligands, and two water molecules per formula unit. The 3-fluorobenzoate and pyridine-3-carboxamide are monodentate through a carboxylate
oxygen atom and the nitrogen atom of the pyridine ring, respectively. UV-Vis results showed that the studied complexes have absorption edges similar to semiconductor structures. Namely, 1 and 2 indicated emission behaviors around 370 nm and 361 nm, respectively.
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Document Type: Research Article
Department of Chemical Engineering, Faculty of Engineering and Architecture, Kafkas University, Kars, Turkey;
Department of Electrical and Electronic Engineering, Faculty of Engineering and Architecture, Kafkas University, Kars, Turkey;
Department of Physical Engineering, Faculty of Engineering, Ankara University, Ankara, Turkey;
Department of Chemistry, Faculty of Sciences, Atatürk University, Erzurum, Turkey
April 3, 2019