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在常温水溶液条件下,合成了一种二维四核铁取代夹心型锑钨酸盐NdNa3[Fe4(H2O)10][β-B-SbW9O33]2·36H2O(1),并通过IR光谱和单晶X射线衍射对其进行了表征.化合物1属于三斜晶系,P-1空间群,晶胞参数:a=1.264 8(3)nm,b=1.270 1(3)nm,c=1.616 0(4)nm,α=74.467(4)°,β=77.592(4)°,γ=83.658(4)°,V=2.438 9(9)nm3,Z=1,Dc=4.000g/cm3,GOOF=1.047,R1=0.065 6,wR2=0.162 2.X射线单晶结构分析表明,化合物1的多阴离子由两个相同的三缺位Keggin[β-B-SbW9O33]9-单元通过四个八面体配位的铁离子连接而成.四个FeO6八面体没有直接相连,四个FeIII离子可以分为两组:内部的FeIII离子带有两个水配体,而外部的FeIII离子连有三个水配体.邻近二聚多阴离子通过无序的钠/钕桥配离子构筑了二维层结构.
A two-dimensional tetranuclear iron substituted sandwich antimony tungstate NdNa3 [Fe4 (H2O) 10] [β-B-SbW9O33] 2 · 36H2O (1) was synthesized at room temperature in aqueous solution. X-ray diffraction of compound 1. Compound 1 belongs to the triclinic system, P-1 space group with unit cell parameters of a = 1.264 8 (3) nm, b = 1.270 1 (4) nm, α = 74.467 (4) °, β = 77.592 (4) °, γ = 83.658 (4) °, V = 2.438 9 (9) nm3, Z = 1 and Dc = 4.000 g / = 1.047, R1 = 0.0656, wR2 = 0.162 2. X-ray single crystal structure analysis showed that the polyanion of compound 1 consists of two octahedron of the same three vacancy Keggin [β-B-SbW9O33] 9- Four FeO6 octahedrons are not directly connected, four FeIII ions can be divided into two groups: the internal FeIII ion with two water ligands, and the external FeIII ion with three water with Adjacent dimeric polyanions form a two-dimensional layer structure through disordered sodium / neo-bridged ions.