부산대학교 도서관

Two cobalt(II) compounds [Co(2,2'-bipy)(H2O)2(SO4)]n (1) and [Co2(2,2'-bipy)2(btec)(H2O)6]·2H2O (2) (2,2'- bipy = 2,2'-bipyridine, H4btec = 1,2,4,5-benzenetetracarboxylic acid), have been simultaneously synthesized by a one-pot slow solvent evaporation reaction. Their structures were determined by single-crystal X-ray diffraction and further characterized by X-ray powder diffraction (XRPD), IR, elemental and thermogravimetric analysis (TGA). The structural analysis reveals that compound 1 exhibits an infinite 1D chain structure with the octahedral Co(II) centers bridging by the tetrahedral μ2-SO4 2− ligands, while compound 2 possesses a dinuclear Co2(2,2'-bipy)2(btec)(H2O)6 unit and the two adjacent octahedral Co(II) ions are linked by the bismonodentately coordinated btec ligand. Additionally, compound 2 exhibits blue fluorescent emission in the solid state at room temperature.