A novel hybrid compound [Co（4,4′-bipy）2（H2O）4]（4,4′- H2bipy）2[H2W12O40]5.5H2O has been synthesized from an acidified aqueous solution and characterized by elemental and thermal analyses, IR and UV spectroscopy...A novel hybrid compound [Co（4,4′-bipy）2（H2O）4]（4,4′- H2bipy）2[H2W12O40]5.5H2O has been synthesized from an acidified aqueous solution and characterized by elemental and thermal analyses, IR and UV spectroscopy, and single-crystal X-ray structure determination. Structure analysis indicates that the title compound is of monoclinic, space group C2/c, with a = 21.315（9）, b = 15.303 （7）, c = 24.139（10）/k, β = 105.170（5）°, V= 7599（6）/k3, Mr= 3706.99, Z= 4, F（000） = 6616, Dc = 3.231, μ = 18.395 mm^-1, R = 0.0652 and wR = 0.1594. X-ray crystallographic study shows that the title compound consists of one [Co（4,4′-bipy）2（H2O）4]^2＋ cation, two diprotonated 4,4′-bipyridine molecules, 5.5 water molecules of crystallization, and one metatungstate polyoxoanion [H2W12O40]^6-, which approaches an effective Td point symmetry. TG-DTA analysis indicates that the framework of the metatungstate polyoxoanion is collapsed at 587.0℃.展开更多
基金the Program for New Century Excellent Talent in University of Henan Provincethe Foundation of Educational Department of Henan Province+1 种基金the Natural Science Foundation of Henan Provincethe Natural Science Foundation of Henan University
文摘A novel hybrid compound [Co（4,4′-bipy）2（H2O）4]（4,4′- H2bipy）2[H2W12O40]5.5H2O has been synthesized from an acidified aqueous solution and characterized by elemental and thermal analyses, IR and UV spectroscopy, and single-crystal X-ray structure determination. Structure analysis indicates that the title compound is of monoclinic, space group C2/c, with a = 21.315（9）, b = 15.303 （7）, c = 24.139（10）/k, β = 105.170（5）°, V= 7599（6）/k3, Mr= 3706.99, Z= 4, F（000） = 6616, Dc = 3.231, μ = 18.395 mm^-1, R = 0.0652 and wR = 0.1594. X-ray crystallographic study shows that the title compound consists of one [Co（4,4′-bipy）2（H2O）4]^2＋ cation, two diprotonated 4,4′-bipyridine molecules, 5.5 water molecules of crystallization, and one metatungstate polyoxoanion [H2W12O40]^6-, which approaches an effective Td point symmetry. TG-DTA analysis indicates that the framework of the metatungstate polyoxoanion is collapsed at 587.0℃.
