【摘要】 在水热条件下,合成了一例新型双核锑反式加冠杂多铌酸盐[Ni(en)2(H2O)2]2[Ni(H2O)6]2[HPNb12Sb2O40]·28H2O(1),并通过X-射线粉末衍射﹑IR光谱﹑UV光谱、热重以及X-射线单晶衍射对其结构进行了表征。在其阴离子结构中,中心磷原子被12个铌原子所包围形成经典的Keggin型结构,两个Sb原子以四方锥构型分别加冠于两个相对的{Nb4O4}上。另外,对化合物1的光催化产氢性能进行了初步研究。更多还原

【Abstract】 A new SbIII-bicapped Keggin heteropolyoxoniobate [Ni(en)2(H2O)2]2[Ni(H2O)6]2- [HPNb12Sb2O40]·28H2O(1) has been synthesized by hydrothermal method. Single-crystal X-ray structural analysis shows that compound 1 consists of a bicapped [PNb12O40Sb2]9– Keggin polyanion and nickel-complexes as the counter-cations. The polyanion can be regarded as a decorated Keggin cluster with one phosphorous atom as the heteroatom center and two antimony atoms capping two opposite pits. The caps are formed by the ligation of the oxygen atoms on the two opposite {Nb4O4} faces to each Sb atom, leading to distorted square pyramidal coordination geometry. Further, the photocatalytic activity of 1 for H2 evolution was also evaluated.更多还原