以S-中心Preyssler型多酸为模板构筑有机-无机杂化材料

Assembly of organic-inorganic hybrid materials based on S-centered preyssler-type polyoxometalate template

采用水热合成方法构建了基于Preyssler型多酸[S5W30O110]的有机-无机杂化材料,其分子式为[HKS5W30O110]·（2,2-Hbpy）8·2H2O（1,bpy=bipyridine）.单晶X-射线衍射分析表明化合物1是由S-中心的Preyssler型多酸作为模版,被2,2-联吡啶分子包围形成的核壳结构的有机无机杂化材料.这是第一例基于S-中心Preyssler型多酸的超分子核壳结构.其中质子化的2,2’-联吡啶有机基团通过静电作用与Preyssler型多酸分子构筑成有机无机杂化材料.该化合物属于三斜晶系,空间群为P-1.晶胞参数：a=1.795 05（2）nm,b=1.834 78（2）nm,c=4.128 16（4）nm,α=85.061 0（10）°,β=80.616 0（10）°,γ=60.721 0（10）°,晶胞体积为11.700 2（2）nm3.

In this paper,a new organic-inorganic hybrid materials [HKS5 W30 O110]·（2,2-Hbpy）8·2 H2 O（compound 1,bpy=bipyridine）based on Preyssler-type{S5 W30}anion was synthesized by hydrothermal method.Single crystal X-ray diffraction analysis reveals that the Preyssler-type polyoxoanions were encircled by 2,2＇-bipyridine into a supramolecular assemblies.In the structure,the 2,2＇-bipyridine cationic groups and the Preyssler-type polyoxoanions working together with electrostatic interaction resulting in the organic-inorganic hybrid materials.Compound 1 crystallized into triclinic system,space group P-1 with a=1.795 05（2）nm,b=1.834 78（2）nm,c=4.128 16（4）nm,α=85.061 0（10）°,β=80.616 0（10）°,γ =60.721 0（10）°,V=11.700 2（2）nm3.