摘要
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℃.
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℃.
基金
the Program for New Century Excellent Talent in University of Henan Province
the Foundation of Educational Department of Henan Province
the Natural Science Foundation of Henan Province
the Natural Science Foundation of Henan University
