| 三核和四核金属-有机簇修饰的四个多酸化合物的结构、选择性光催化和汞离子传感性能 |
| Four Keggin Compounds Modified by Tri-and Tetra-nuclear Metal-Organic Clusters: Structures, Selective Photocatalytic and Hg2+ Recognition Characteristics |
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| 摘要: 使用柔性含S有机配体4-（2-噻吩-2-基-乙基）-4H-[1，2，4]三氮唑（L），通过调控反应参数成功制备出4个基于Keggin的化合物，即[Cu3ⅠL3（PMo12O40）]（1）、[Cu4ⅠL6（SiW12O40）]（2）、[Cu4ⅠL6（SiMo12O40）]（3）和[Zn4L6（SiW12O40）]（4），并利用单晶X射线衍射、元素分析和红外光谱进行表征。化合物1中3个Cu+离子聚合3个配体诱导一个环状的三核铜簇。Keggin多阴离子连接三核簇构筑二维层结构。化合物2、3和4同构，包含由6个配体连接4个金属离子（2、3中为铜离子，4中为锌离子）形成的四核[M4L6]4+簇。多酸阴离子提供2个氧原子连接2个[M4L6]4+簇，从而形成一维链结构。标题化合物对废水中的阳离子染料亚甲基蓝（MB）展示了良好的选择性光催化性能。另外2-CPE（碳糊电极）可作为安培传感器来检测过氧化氢和亚硝酸根。化合物1、2和4展示了对Hg2+的传感性能。 |
| 关键词: 多酸基化合物 电化学性能 选择性光催化 Hg2+传感 |
| 基金项目: 国家自然科学基金（No.21571023，21101015）、辽宁省兴辽英才青年拔尖项目（No.XLYC1807049）和辽宁省教育厅项目（No.LQ2020010、LJ2019006）资助 |
| Abstract: By using a flexible S-containing ligand 4-(2-thiophen-2-yl-ethyl)-4H-[1,2,4]triazole (L), four Kegginbased compounds, namely[Cu3ⅠL3(PMo12O40)] (1),[Cu4ⅠL6(SiW12O40)] (2),[Cu4ⅠL6(SiMo12O40)] (3) and[Zn4L6 (SiW12O40)] (4), were successfully synthesized by controlling the reaction parameters and well characterized by single -crystal X-ray diffraction, elemental analyses, and IR spectra. In compound 1, three Cu+ ions are fused by three L ligands inducing a cyclic tri-nuclear Cu+ cluster. The Keggin anions link the tri-nuclear clusters to construct a 2D layer. Compounds 2, 3 and 4 are isostructural, including a tetra-nuclear[M4L6]4+ cluster with six L ligands connected by four M ions (M=Cu in 2 and 3, Zn in 4). The Keggin anion offers two O atoms to link two[Cu4L6]4+ clusters and a 1D chain is formed. The title compounds exhibited good selective degradation of cationic methylene blue (MB) dye in wastewater. Additionally, the 2-CPE (carbon paste electrodes) could act as an amperometric sensor for detection of hydrogen peroxide and nitrite. Compounds 1, 2 and 4 also showed Hg2+ recognition properties. |
| Keywords: polyoxometalate electrochemical properties selective photocatalysis Hg2+ recognition |
| 投稿时间：2020-03-15 修订日期：2020-07-28 |
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| 应俊,张宝月,田爱香.三核和四核金属-有机簇修饰的四个多酸化合物的结构、选择性光催化和汞离子传感性能[J].无机化学学报,2020,36(10):1831-1844. |
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