Wang Jian-Ping, Ma Hong-Xin, Zhang Lan-Cui, You Wan-Sheng, Zhu Zai-Ming
School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China.
Dalton Trans. 2014 Dec 7;43(45):17172-6. doi: 10.1039/c4dt02571g.
Two novel Strandberg-type organophosphomolybdate hybrid compounds [(Cu(H2O))2(μ-bipy)2(C6H5PO3)2Mo5O15]n (1) and [(Cu(H2O)2)2(μ-bipy)(C6H5PO3)2Mo5O15]n (2) (bipy = 4,4'-bipyridyl) were prepared under mild hydrothermal conditions and structurally characterized by physico-chemical and spectroscopic methods. Single crystal X-ray diffraction analysis reveals that compounds 1 and 2 are polyoxometalate-based Cu-coordination polymers with a three-dimensional framework. In 1, the Cu(2+) ions not only link (C6H5PO3)2Mo5O15 (abbreviated as {(C6H5P)2Mo5}) polyanions, but also act as connectors of bipy ligands to produce two symmetrical 1-D chains, all 1-D chains are further held together by polyanions to generate a 3-D network. In 2, each {(C6H5P)2Mo5} polyanion acting as a hexadentate ligand links four Cu(II)-bipy/H2O units, forming 2-D plane structures, which are further bridged by Cu(II)-bipy-Cu(II) fragments to generate a 3-D network. Their fluorescence properties and catalytic properties for the synthesis of cyclohexanone ethylene ketal were also investigated.
在温和水热条件下制备了两种新型的斯特兰德伯格型有机磷钼酸盐杂化化合物[(Cu(H₂O))₂(μ - bipy)₂(C₆H₅PO₃)₂Mo₅O₁₅]ₙ (1)和[(Cu(H₂O)₂)₂(μ - bipy)(C₆H₅PO₃)₂Mo₅O₁₅]ₙ (2)（bipy = 4,4'-联吡啶），并通过物理化学和光谱方法对其进行了结构表征。单晶X射线衍射分析表明，化合物1和2是基于多金属氧酸盐的铜配位聚合物，具有三维骨架结构。在1中，Cu(2+)离子不仅连接(C₆H₅PO₃)₂Mo₅O₁₅（简称为{(C₆H₅P)₂Mo₅}）聚阴离子，还作为联吡啶配体的连接体形成两条对称的一维链，所有一维链通过聚阴离子进一步连接在一起形成三维网络。在2中，每个{(C₆H₅P)₂Mo₅}聚阴离子作为六齿配体连接四个Cu(II)-联吡啶/H₂O单元，形成二维平面结构，这些二维平面结构通过Cu(II)-联吡啶-Cu(II)片段进一步桥连形成三维网络。还研究了它们的荧光性质和催化合成环己酮缩乙二酮的性能。
