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水热条件下合成了一种新的链状硅钨酸盐簇合物{H[Na(H_2O)_6][Cu_6(H_2O)6(Si_2W_(18)O_(68))][Cu(H_2O)4)]3}·7.72H_2O,通过X-射线单晶衍射方法确定了其晶体结构.结构分析表明该簇合物为单斜晶系,C/2c空间群,晶胞参数a=2.179 26(9)nm,b=1.282 89(5)nm,c=3.147 84(13)nm,α=90°,β=106.961 0(10)°,γ=90°,V=8.417 8(6)nm~3,Mr=5 685.17,D_c=4.435g/cm~3,Z=4,S=1.062,F(000)=9 977,R_1=0.033 8,wR_2=0.079 6.化合物是由六核铜簇连接相邻的三缺位[[A-α-SiW_9O_(34)]~(10-)]10-形成的一维链状结构,配位于一维链两侧的多酸顶端上的Cu~(2+)离子、离散的Cu~(2+)离子和Na~+离子起到平衡电荷的作用.该化合物修饰的碳糊电极对NO_2~-有好的电催化还原活性,此外标题化合物作为光催化剂对亚甲基蓝和甲基橙的降解有明显的催化活性.
(H 2 O) 6] (Si 2 W 18 O 68)] [Cu (H 2 O) 6] has been synthesized under hydrothermal conditions, 4)] 3} · 7.72H 2 O and its crystal structure was confirmed by X-ray single crystal diffraction method.The structure analysis showed that the cluster was monoclinic with space group C / 2c with a = 2.179 26 ( (9) nm, b = 1.282 89 (5) nm, c = 3.147 84 (13) nm, α = 90 °, β = 106.961 0 (10) °, γ = 90 °, 3, Mr = 5 685.17, D_c = 4.435g / cm ~ 3, Z = 4, S = 1.062, F (000) = 9 977, R_1 = 0.0338, wR_2 = 0.079 6. The compounds are connected by a six- One-dimensional chain structure formed by the adjacent tri-vacancy [[A-α-SiW_9O_ (34)] ~ (10 -)] 10- +) Ions, discrete Cu 2+ ions and Na + ions play a role of balanced charge.The compound modified carbon paste electrode has good electrocatalytic activity for NO 2 ~ - addition, and the title compound as a photocatalyst Degradation of methylene blue and methyl orange has obvious catalytic activity.