【摘要】 利用水热合成法制备了一种新的沙漏型砷钼酸盐化合物（NH₁）₇[AsMo₈O₃₀]（1）,借助X射线单晶衍射、X射线粉末衍射、红外光谱（IR）、紫外光谱（UV）和热分析研究了化合物的结构和性质.结果表明,化合物1属于正交晶系,Cmcm空间群,晶胞参数为:a=0.848 3（4）nm,b=2.322 3（10）nm,c=1.559 1（7）nm,V=3.071（2）nm³,Z=4,R₁[I>2σ（I）]=0.0431,ωR₂[I>2σ（I）]=0.123 6.X射线单晶衍射分析结果表明,化合物1包含沙漏型的砷钼酸盐阴离子[AsMo₉O₃₀]^7-.更多还原

【Abstract】 A new sandglass-like arsenomolybdate compound,（NH₄）₇[AsMo₈O₃₀]（1）,was successfully synthesized via a hydrothermal route.The structure of the compound was determined by means of single-crystal X-ray diffraction,X-ray powder diffraction（XRPD）,infrared spectrometry, and ultraviolet spectrometry,and its thermal stability was evaluated based on thermogravimetric analysis.Results indicate that compound 1 belongs to orthorhombic system with space group Cmcm.Its crystal cell parameters are a = 0.848 3（4） nm,b = 2.322 3（10） nm, c = 1.559 1（7） nm,V = 3.071（2） nm³,Z = 4,R₁[I>2σ（I）]= 0.043 1,and wR₂[I>2σ（I）]= 0.123 6.Single-crystal X-ray diffraction analysis shows that compound 1 contains an octamolybdoarsenate polyoxoanion[AsMo₈O₃₀]^7- which consists of two Mo₄O₁₅ moieties joined together by one central AsO₄ tetrahedron,forming an interesting sandglass-like structure.更多还原