缺位的Wells-Dawson型磷钨酸盐和Eu(Ⅲ)构筑的一维链状多金属氧酸盐化合物

A Polyoxometalate Compound with 1D Chain Built up of Lacunary Wells-Dawson Polyoxotungstate and Eu(Ⅲ)

在水溶液条件下以六缺位的[H2P2W12O48)]12-和Eu髥为反应前躯体得到了1个新的多金属氧酸盐化合物[Eu3(H2O)17(α2-HP2W17O61)].5H2O(1),对其进行了元素分析、红外光谱、热重、荧光等表征,并用X-射线单晶衍射测定了它的晶体结构。化合物1含有双支撑的多阴离子簇[{Eu(H2O)7}2{Eu(H2O)3(α2-P2W17)}2]8-,并进一步通过Eu髥连接形成了延c轴方向的一维链。室温条件下的荧光光谱研究表明:化合物1显示了强的红光发射。

A polyoxometalate compound built on lacunary Wells-Dawson polyoxotungstate and Eu（Ⅲ） cation,[Eu 3（H 2 O） 17（α 2-HP 2 W 17 O 61）]·5H 2 O（1）,has been synthesized by conventional solution method and characterized by elemental analysis,IR spectroscopy and single crystal X-ray diffraction.Compound 1 shows a bisupporting polyoxometalate cluster structure where two {Eu（H 2 O） 7 } 2 3＋ fragments are supported on the polyoxometalate [{Eu（H 2 O） 3（α 2-P 2 W 17）} 2 ] 14-.1 displays a 1D chain structure built up of bisupporting polyoxoanions [{Eu（H 2 O） 7 } 2 {Eu（H 2 O） 3（α 2-P 2 W 17）} 2 ] 8-and Eu（Ⅲ） ions.Photoluminescence measurement reveals that 1 exhibits red fluorescent emission at room temperature.