【摘要】 通过水热法合成了一例Keggin型磷钼酸盐超分子配合物,化学式为（H₂bpe）（Hbpe）{PMo₁₂O₄₀}·6H₂O （1）（bpe=反式-1,2-双（4-吡啶基）-乙烯）.通过使用单晶X射线衍射、红外光谱、X射线粉末衍射、热重、循环伏安、固体可见漫反射光谱等测试手段对其结构、氧化还原性能以及光学活性进行了表征,并将其用于光催化还原Cr（Ⅵ）反应体系中.结构分析表明,化合物1中的无机部分由离散的[PMo₁₂O₄₀]^3-阴离子簇组成,该阴离子簇通过与有机抗衡阳离子之间的氢键作用连接形成三维超分子结构.化合物1具有宽的可见光吸收和合适的能带结构,在光催化还原Cr（Ⅵ）反应中展现出良好的光催化活性.在80 min内,Cr（Ⅵ）还原转化率可达到72%.经过4次循环后,结构依然保持良好.该工作为设计和制备高效的多酸基Cr（Ⅵ）光催化剂提供了新的方法.更多还原

【Abstract】 In this work, a Keggin-type supramolecular complex with formula of（H₂bpe）（Hbpe）[PMo₁₂O₄₀]·6 H₂O（1）（bpe = trans-1,2-bi（4-pyridyl）-ethylene） was hydrothermally synthesized and characterized by single crystal X-ray diffraction, infrared spectrum, powder X-ray diffraction, thermogravimetry TG,cyclic voltammetry, UV-vis diffuse-reflectance spectroscopy.Compound 1 was constructed by [PMo₁₂O₄₀]^3-polyoxoanions and protonated bpe cations, and the hydrogen bonding interactions between them extended the whole structure into three-dimensional supramolecular structure.The UV-vis DRS spectrum demonstrated that compound 1 has wide absorption range towards visible-light and suitable energy band structure.When using as photocatalyst, compound 1 showed excellent photocatalytic performance towards the reduction of Cr（Ⅵ）.The reduction rate of Cr（Ⅵ） can reach to 72 % within 80 min.After 4 cycles, the structure is still in good condition.This work provides a new guidance for the design and preparation of highly efficient Cr（Ⅵ） photocatalysts based on polyoxometalates.更多还原