A new dimeric lanthanoid-containing arsenotungstate K14 H8{Ce ( H2 O ) 3 [ As2 W19 O67 (H2O)]}2·48H2O (1) has been synthesized by the conventional solution synthetic strategy, and was characterized by IR spectrum, TG analysis and X-ray single-crystal diffraction. X-ray structural analy-sis shows that the compound belongs to triclinic system with space group P-1, a = 1.24113(5) nm, b = 1.84215(8) nm, c = 2.19397(9) nm, α = 69.9660(10)°, β = 77.8030(10)°, γ =77.9260(10)°, Z = 1, Mr= 11125.90, V = 4.5549(3) nm3,μ = 25.519 mm-1, R1= 0.0459, wR2= 0.1172 [ I>2σ( I) ] . 1 exhibits an interesting dimeric structural skeleton, and the Ce3+ion re-sides in the eight-coordinate distorted dicapped triangular prism.%以介稳态的K14[As2 W19 O67(H2 O)]为多酸前驱体与CeCl3·6H2 O和2,6-吡啶二羧酸反应,采用常规水溶液合成法制得了二聚的且保持多酸前驱体[As2W19O67(H2O)]14-结构骨架的多酸基稀土衍生物K14H8{Ce(H2O)3[As2W19O67(H2O)]}2·48H2O(1),并测定了其晶体结构.同时,通过红外光谱以及热分析对其进行了表征.X射线单晶结构分析表明,化合物1属于三斜晶系,P-1空间群,晶胞参数为a=1.24113(5)nm,b=1.84215(8)nm,c=2.19397(9)nm,α=69.9660(10)°,β=77.8030(10)°,γ=77.9260(10)°,Z=1,Mr=11125.90,V=4.5549(3)nm3,μ=25.519 mm-1,R1=0.0459,wR2=0.1172[I>2σ(I)].化合物1是二聚结构,其中Ce3+离子采用八配位畸变的双加冠三棱柱配位构型.
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