选用对称刚性有机配体4，4'-联吡啶(4，4'-bipy)，在水热条件下同一反应釜中制备了 2个由Anderson型多酸诱导的超分子化合物[H2(4，4'-bipy)]3·(TeMo6O24)·(H2Mo6O19)(1)和{Cu2[H(4，4'-bipy)]2(H2O)6(TeMo6O24)}·4H2O(2)。通过单晶 X 射线衍射仪对化合物1和2的结构进行了测定，并利用FT-IR光谱和元素分析等方法进行了表征。化合物1分子由Anderson和Lindqvist型的2个孤立多酸阴离子和3个有机配体4，4'-bipy构成。其中多酸阴离子之间，多酸阴离子与配体4，4'-bipy之间形成的双多酸双层一维链均由氢键促成。链与链之间构筑二维层结构也是通过丰富的氢键得以实现的。同时包含Anderson和Lindqvist多阴离子的化合物在多酸晶体结构中并不常见。化合物2包含1个Anderson多阴离子以及作为修饰体的有机-金属亚单元{Cu2[H(4，4'-bipy)]2(H2O)6 }6+。其中每个单元片段通过氢键作用形成相互交替的一维超分子链。重点研究了化合物1和2的电化学性质和光催化性能。结果显示，化合物1和2对亚甲基蓝染料和酸性品红染料具有光催化降解性能，对亚硝酸根离子和Cr(Ⅵ)离子的还原具有电催化活性。化合物2还可以作为超级电容器材料。
Two Anderson-based supramolecular compounds modified by 4,4'-dipyridy synthesized in one-pot
Using symmetrical rigid organic ligand 4,4'-dipyridy(4,4'-bipy),two new Anderson-based su-pramolecular compounds,namely,[H2(4,4'-bipy)]3·(TeMo6O24)·(H2Mo6Oi9)(1)and { Cu2[H(4,4'-bi-py)]2(H2O)6(TeMo6O24)}·4H2O(2),were synthesized in one-pot under hydrothermal conditions.The compounds 1 and 2 have been tested by IR spectra,elemental analyses and single-crystal X-ray diffraction.Compound 1 contains one discrete Anderson anion,one Lindqvist anion and three 4,4'-bipy organic lig-ands.The anions and 4,4'-bipy alternate with each other by hydrogen bonding,building a supramolecular 1D chain.Adjacent 1D chains are interlinked through hydrogen bonding interactions to further connect a supramolecular 2D layer.Compounds containing both Anderson and Lindqvist polyanions are not common in the crystal structure of POMs.Compound 2 contains one Anderson anion and two metal-organic sub-units {Cu2[H(4,4'-bipy)]2(H2O)6 }6+as modifiers.The Anderson anions and {Cu2[H(4,4'-bipy)]2(H2O)6}6+subunits are organized into alternating through hydrogen bonding interactions to construct a supramolecular 1D chain.Additionally,the electrochemical properties of compounds 1 and 2 as well as photocatalytic properties are investigated.Results show that compounds 1 and 2 have photocatalytic activi-ty,which can photocatalyze the degradation of organic dyes MB and AF.Also,compounds 1 and 2 have good electrochemical properties for amperometric detection of NO2-and Cr(Ⅵ).Furthermore,Compound 2 can be used as materials of supercapacitor.
Anderson POMhydrothermal synthesessupramolecular structureelectrochemistryphoto-catalysis
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