基于｛XW_（12）O_（40）｝~（4-）（X=Si/Ge）阴离子的二维Cu（Ⅱ）配合物的合成及晶体结构

利用水热合成技术,成功合成了2种基于Keggin阴离子{XW12O40}4-（X=Si/Ge）的Cu（Ⅱ）配合物：H2{Cu（4,4′-bipy）3/2（OH）（H2O）}2{XW12O40}].4H2O（X=Si,1;X=Ge,2）,通过单晶X-射线衍射分析、红外光谱、热重-差热分析及电化学手段对配合物进行了结构表征和基本的性质研究.单晶X-射线衍射分析表明,它们互为异质同构体,晶体结构可描述为Cu（Ⅱ）离子通过OH-基团和4,4′-bipy分子连接形成了一维Z形链,链与链之间进一步通过Keggin阴离子的两个端氧原子与Cu（Ⅱ）离子桥联,形成二维层状结构;沿b轴方向观察1和2的晶体结构,发现邻近的层与层之间距离为14.9.

Hydrothermal synthesis and crystal structure of two 2D copper coordination polymers based on heteropolyoxoanions {XW12O40 }4-(X =Si/Ge)

Two Cu(Ⅱ) coordination polymers based on heteropolyoxoanions {XW12O40}4-(X = Si/Ge),{Cu(4,4′-bipy)3/2(OH)(H2O)}2{H2XW12O40}]·4H2O(X = Si,1;X = Ge,2) have been synthesized under the hydrothermal condition and characterized by X-ray single crystal diffractometer,IR spectroscopy,thermogravimetric analysis and electrochemical measurement.Single-crystal X-ray diffraction analysis reveals that they are isostructural.Their structures can be considered as an 1D infinite zigzag chain built up through bridging Cu(Ⅱ) ions with OH-groups and 4,4′-bipy molecules.The chains are bridged via {XW12O40}4-(X = Si/Ge) anions into a 2D layered structure.Viewed along the b axis,the distance between the layers is 14.9.