| The transition metal-containing polyoxotungstates have attracted great attention not only stems from their intriguing variety of architectures,but also from their potential applications in the fields as diverse as catalysis,medicine,molecular magnetism and material science.In recent years,the synthesis of transition metal-containing polyoxotungstates has become an important research area of the synthesis of polyoxometalates.The aim of this thesis is the synthesis of new polyoxometalate compounds on the basis of lacunary Keggin-type polyoxoanion clusters,which are substituted by various transition metal ions forming sandwich structure.The study on synthetic conditions and rules for these new compounds,and the exploration of cyrstal structures for these new compounds are also carried out.Three polyoxometalate compounds have been synthesized on the basis of water solution synthesis methods and structurally characterized by IR and single crystal X-ray diffractions.(1) K1.4Na6{(BiW9O33)2[Co(H2O)]2.7[(WO)1.3]}·34H2O, Monoclinic, P2(1)/n spacegroup, a= 12.850(3)(?), b=25.052(5)(?), c=16.025(3)(?), a=90°,β=94.98(3)°,γ=90°, Z=2, R1=0.0715, wR2= 0.1544.(2) Na9[{Na(H2O)2}3{Zn(H2O)}3(BiW9O33)2]·30H2O,Triclinic,P-1 spacegroup,a=12.819(3)(?), b=16.186(3)(?), c=24.636(5)(?), a=84.98°,β=73.10(2)°,γ= 84.24°, Z=2, R1=0.0586, wR2= 0.1461.(3) Na9{(BiW9O33)2[Ni(H2O)]6[(WO)2]}·41H2O, Triclinic, P-1 spacegroup,a=12.873(3)(?), b=16.122(3)(?), c=25.162(5)(?), a=90.00°,β=90.00(3)°,γ=93.94°, Z=2, R1=0.0674, wR2=0.1651.
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