一种Zn-K取代夹心型锑钨酸盐的制备、晶体结构和光催化活性（英文）

Preparation,crystal structure and photocatalytic activity of a zinc-potassium substituted sandwiched antimonotungstate

合成了一种Zn-K取代的夹心型锑钨酸盐Na9[Zn_3K_3(H_2O)_9][B-α-SbW_9O_(33)]_2·44 H_2O(1),并借助元素分析、红外光谱和X射线单晶衍射等方法对其进行了表征.标题化合物属于单斜晶系,C2/c空间群,晶胞参数:a=1.399 93(12)nm,b=2.317 6(2)nm,c=3.208 8(3)nm,β=98.804 0(10)°,V=10.288 0(15)nm^3,Z=4,D c=3.930 g/cm^3,GOOF=1.026,R_1=0.043 6,wR_2=0.103 5.X射线单晶衍射结构分析表明,化合物1分子结构由2个三缺位锑钨构筑块[B-α-Sb W9O33]9-通过12个缺位氧原子与1个六边形锌钾簇[Zn_3K_3(H_2O)_9]^(9+)相连而成.光催化结果表明,化合物1在一定程度上可以抑制偶氮荧光桃红的光降解.

A zinc-potassium substituted sandwich-type antimonotungstate Na_9[Zn_3K_3(H_2O)_9][B-α-Sb W_9O_(33)]_2·44H_2O(1) was synthesized and characterized by elemental analysis,IR spectra and single-crystal X-ray diffraction. The title compound crystallizes in the monoclinic space group C2/c with a= 1.399 93(12) nm,b = 2. 317 6(2) nm,c = 3. 208 8(3) nm,β = 98. 804 0(10) °,V =10.288 0(15) nm^3,Z = 4,Dc= 3.930 g/cm^3,GOOF = 1.026,R_1= 0.043 6 and wR_2= 0.103 5.X-ray crystal structural analysis reveals that the molecular unit of 1 is constructed from two trivacant[B-α-Sb W9O33]9-building blocks sandwiching a hexagon zinc-potassium [Zn_3K_3(H_2O)_9]^(9+) core via twelve lacunary oxygen atoms. The photocatalytic measurements illustrate that 1 can partly inhibit the photodegradation of azophloxine.