铌取代型杂多钨酸盐的合成及晶体结构

Synthesis, Crystal Structure and Bioactivity of Heteropolyoxotungstate Substituted by Niobium

合成了铌取代的钨硅杂多配合物Ｋ４Ｈ３［ＳｉＷｂ３Ｏ４０］·４Ｈ２Ｏ，通过单晶Ｘ－射线衍射对其结构进行了表征，该化合物同单斜晶系，Ｃ２空间群，晶胞参数ａ＝１．９１５ ４３（４）ｎｍ，ｃ＝１．２４９７（３）ｎｍ，Ｖ＝３．９７０６（１１）ｎｍ３，Ｄｃ＝ ３．５２４ ０ ｇ／ｃｍ３，Ｚ＝ ３，μ＝ ２１．０１８ｍｍ－１，Ｆ（０００）＝ ３ ６８０，Ｒ＝０．０５６ ５，ＷＲ２＝０．０９７ ２．通过红外光谱。

The new complex K4H3 [SiW9Nb3O40]· 4H2O was synthesized and characterized by IR and UV spectroscopies. The crystal structure was determined by X-ray diffraction. It was showed that the compound remained Keggin structure and crystallized in the hexagonal system having space group is P32 with cell parameters α = 1.91543(4)nm,c=1.2497(3)nm,V=3.9706(11)nm3,Dc=3.5240g/cm3,Z=3,u=21.018mm-1,F (000) =368 0,R = 0.056 5,WR2 =0.0972.