水热法合成了新的配位聚合物, ［Eu(2-stp)(2,2’-bipy)(H2O)］·H2O (2-stp=2-磺酸对苯二甲酸根, 2,2’-bipy=2,2’-联吡啶）。 通过X-射线单晶衍射确定了该配合物的晶体结构。 该配合物为一维平行双链结构。 Eu3+与2-磺酸对苯二甲酸根的六个氧原子, 2,2’-联吡啶的两个氮原子和一个水分子配位。 对该配合物进行了荧光性质的研究, 发射光谱中出现了Eu3+的五个特征峰, 分别位于581, 594, 619, 654和698 nm, 对应于Eu3+的5D0→7FJ (J=0～4)跃迁。 位于619 nm的最强发射峰是由5D0→7F2跃迁产生的。 不同有机溶剂对该配合物荧光强度有不同程度的影响, 苯甲醛对该配合物具有显著的荧光猝灭效应, 故该配合物可作为苯甲醛的荧光感应探针。

A new lanthanide coordination polymer, ［Eu(2-stp)(2,2’-bipy)(H2O)］·H2O (2-stp=2-sufoterephthalalic acid, 2,2’-bipy=2,2’-bipyridine) was obtained by hydrothermal method. The crystal structure was determined by single crystal X-ray diffraction. The complex has a one-dimensional parallel double-chain structure. Eu3+ is a nine-coordinated by six O atoms from three 2-sufoterephthalalic acids, one water molecule and two N atoms from 2,2’-bipyridine. The fluorescence properties of the complex were studied. The complex shows the characteristics narrow emission of Eu3+ ion at 581, 594, 619, 654 and 698 nm, corresponding to 5D0→7FJ (J=0～4) transitions. The strongest emission peak is at 619 nm, corresponding to 5D0→7F2 transition for red light. Different organic solvents have different effects on the fluorescence intensity of the complex, and benzaldehyde exerts the most significant fluorescence quenching effect. So, this complex can be used as a fluorescent sensing probe for benzaldehyde.