Akademik Veri Yönetim Sistemi
Journal of Molecular Structure, cilt.1348, 2025 (SCI-Expanded)
Four new Cu(II) coordination polymers, namely [Cu(µ-glu)(mim)2]n (1), {[Cu(µ-glu)(emim)2]·H2O}n (2), [Cu(µ3-dmg)(im)2]n (3) and [Cu4(µ4-dmg)2(pyz)]n (4), where H2glu: glutaric acid, H2dmg: 3,3′-dimethyl glutaric acid, im: imidazole, mim: 2-methyl imidazole, emim: 2-ethyl-4-methyl imidazole, pyz: pyrazine, have been successfully synthesized and structurally characterized by elemental analysis, IR and UV-Vis spectra, single crystal X-ray diffraction, powder X-ray diffraction (PXRD), and magnetic properties. X-ray diffraction studies have revealed that complexes 1 and 2 crystallize in the orthorhombic system, with space groups P212121 (1) and Pbca (2), respectively, while compounds 3 and 4 crystallize in the monoclinic system, with space groups P21/n (3) and C2/c (4), respectively. In compounds 1 and 2, the glu ligands adopt a bis(bidentate) bridging coordination mode, linking Cu(II) ions to form a one-dimensional linear chain. In compounds 3 and 4, the dmg ligands act as bridging linkers, adopting μ-η2:η0:η1:η0 and μ4-η1:η1:η1:η1 coordination modes, respectively, to construct 2D coordination polymer networks. Topological analysis results of complexes 3 and 4 show that complex 3 forms a 5-connected uninodal 2D framework with a Shubnikov plane net (33.43.54) topology, while complex 4 forms a 6-connected uninodal 2D framework with a SP 2-periodic net (36.46.53) topology. Moreover, thermal and optical absorption properties were studied. The thermal stability of the hydrated complexes follows order: 4 (200°C) >3 (197°C) > 1 (190°C) > 2 (177°C) in static air atmosphere. The optical absorption studies revealed that the calculated band gap values of complexes 1-4 are related to the type and structure of the ligands.