Abstract:

Two compounds, [Cu(im)4SO4]n (1) and [Cu(bpy)(H2O)2SO4]n (2) (im = imidazole, bpy = 2,2’-bipyridine), were synthesized under solvothermal condition in 67% and 82% yields, respectively. The relation between crystal structure and acidity of synthesis system were investigated. As 0.35–0.6 mmol and 1.2–1.45 mmol HNO3 were added to reaction system, respectively, pure 1 and 2 were obtained. And they were further characterized by elemental analysis, IR, Uv-vis reflection spectra, inductively coupled plasma(ICP), TGA, powder X-ray diffraction and X-ray crystallography diffraction. The crystal structure analyses reveal that they all belong to the monoclinic system with space group C2/C, possessing chalcanthite-like configuration. Compound 1 exhibits a 1D zigzag chain structure, while 2 being 1D linear chain, which is resulted from different ligands. The shifts of peak absorption in Uv-vis spectroscopy of compounds compared with imidazole and bipyridine indicates that the center ion interact with ligands.

Key words: chalcanthite, copper sulfate, solvothermal synthesis, Uv-vis spectroscopy