基于POMs的化合物合成与电化学性质

多金属氧酸盐（POMs）作为一类新颖、独特的无机构筑单元，可以通过调节合成条件使端氧或桥氧活化，从而得到多种化合物。为了研究POMs的电化学性质，选择Keggin-型磷钼酸和1,4-双(咪唑基)丁烷（L），通过水热法合成了一种新的基于多金属氧酸盐的无机-有机杂化化合物(H₂L)₃(PMo₁₂O₄₀)₂，研究了该化合物对于亚硝酸盐的电催化活性。通过元素分析，红外、热重、X射线单晶衍射和X射线粉末衍射对化合物进行表征，探讨了合成过程中反应条件(例如pH值)与目标化合物结构之间的关系，测试了目标化合物的电化学性能和电催化性质。X射线单晶衍射分析表明，多酸是通过氢键与配体连接的三维结构，属于Triclinic晶系，空间群为P-1；荧光分析表明，化合物的荧光主要来自配体贡献。该化合物对亚硝酸盐有较好的电催化活性，有望用于实际样品中亚硝酸盐的检测。

Electrochemical poperties of new compound based on POMs

Polyoxometalates (POMs ) are novel and unique inorganic building blocks, which can activate the terminal oxygen or bridging oxygen by adjusting the synthesis conditions, thus obtaining various compounds. In order to study the electroche-mical properties of POMs, Keggin-phosphomolybdic acid and 1,4-bis ( imidazolyl ) butane (L) are selected to synthesize a new inorganic-organic hybrid compound (H₂L)₃(PMo₁₂O₄₀)₂ based on polyoxometalates by hydrothermal method. The electrocatalysis activity of the compound to nitrite is studied.The compound has been characterized by elemental analyses, IR, TG, X-ray single crystal diffractions and PXRD, and the connection between synthesis conditions(for example pH values) and compound structures is also studied. The electrochemical behavior and electro-catalysis of the target compound are studied. Single-crystal X-ray diffraction analysis reveals that the polyoxometalates and the organic donor are linked to become 3D structure by hydrogen bonds (triclini, P-1). And Fluorescence analysis indicates that the fluorescence of the compound mainly comes from ligand contribution. The compound exhibits remarkable catalytic activity to nitrite ions and may be actually used for the detection of nitrite.