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(NH_1)_7[AsMo_8O_(30)](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)nm^3,Z=4,R_1[I>2σ(I)]=0.0431,ωR_2[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[AsMo_9O_(30)]^(7-).
A new sandglass-like arsenomolybdate compound,（NH4）7[AsMo8O30],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,R_1[I2σ（I）]= 0.043 1,and wR2[I2σ（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.
出处
《化学研究》
CAS
2011年第5期25-30,共6页
Chemical Research
