title: Synthesis, crystal structure, spectroscopic, fluorescent, thermal properties and EPR spectra of doped Cu2+ ions in [Cd(sac)2(H2O)2(meim)2] single crystal.
abstract: The crystal structures of the six-coordinate complexes [Cd(sac)2(H2O)2(meim)2] (complex 1) formed by reaction of 4-methylimidazole(meim) with [Cd(sac)2(H2O)4]·2H2O (saccharinate=sac), was synthesized and characterized by elemental analysis, infrared (IR) and electron paramagnetic resonance (EPR) spectroscopy, thermal analysis and X-ray single crystal diffraction. X-ray diffraction analysis revealed that complex 1 crystallized in the monoclinic crystal system with space group P21/c. The Cd(II) center was six-coordinated with four nitrogen atoms from two sac and two 4-meim ligands, two oxygen atoms from two aqua ligands. Spectral and thermal analysis data for complex 1 was in agreement with the crystal structures. In addition complex 1 displayed blue fluorescent emission in the solid state at room temperature. Single crystal EPR spectra at room temperature are resolved and have exhibited that two different Cu(2+) complexes were located in different chemical environments which contained two magnetically nonequivalent Cu(2+) sites. In low temperature EPR spectra down to 110 °C did show no considerable change. At higher temperatures, however, both thermo gravimetric analyses (TGA) and EPR spectra showed detectable changes around 140 °C; the causes and the mechanisms of changes are discussed.
authors.affiliation: Department of Physics, Faculty of Sciences, Ataturk University, 25240 Erzurum, Turkey. mbahadirfidan@gmail.com
authors.forename: M
authors.initials: M
authors.lastname: Fidan
authors.forename: F
authors.initials: F
authors.lastname: Semerci
authors.forename: E
authors.initials: E
authors.lastname: Şahin
authors.forename: O Z
authors.initials: OZ
authors.lastname: Yeşilel
authors.forename: R
authors.initials: R
authors.lastname: Tapramaz
authors.forename: Y
authors.initials: Y
authors.lastname: Şahin
mesh_terms: D002104:Cadmium / Q000737:chemistry*; D002413:Cations, Divalent / Q000737:chemistry; D056831:Coordination Complexes / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004578:Electron Spin Resonance Spectroscopy; D007093:Imidazoles / Q000737:chemistry*; D008958:Models, Molecular; D012439:Saccharin / Q000031:analogs & derivatives*; D013818:Thermogravimetry
chemical_list: D002413:Cations, Divalent; D056831:Coordination Complexes; D007093:Imidazoles; D002104:Cadmium; D003300:Copper; D012439:Saccharin; C023439:4-methylimidazole