2-磺酸对苯二甲酸铕配合物的发光性质及对苯甲醛的检测  

Fluorescence Properties and the Detection of Benzaldehyde of Lanthanide Complex with 2-Sufoterephthalalic Acid

作　　者：李佳佳[1] 李睿[1] 马雪[1] 樊婷婷[1] 林一青[1] 宋宇婷[1] 韩婧祺 李夏[1] 

机构地区：[1]首都师范大学化学系,北京100048

出　　处：《光谱学与光谱分析》2016年第2期345-348,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(21471104)资助

摘　　要：水热法合成了新的配位聚合物,[Eu(2-stp)(2,2’-bipy)(H_2O)]·H_2O(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。Eu^(3+)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Eu^(3+)的五个特征峰,分别位于581,594,619,654和698nm,对应于Eu^(3+)的~5 D_0→~7 F_J(J=0~4)跃迁。位于619nm的最强发射峰是由~5 D_0→~7 F_2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）（H_2O）]·H_2O（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.Eu^（3＋）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 Eu^（3＋）ion at 581,594,619,654 and 698nm,corresponding to ~5 D_0→~7 F_J（J=0~4）transitions.The strongest emission peak is at 619 nm,corresponding to ~5 D_0→~7 F_2 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.

关 键 词：铕配合物 2-磺酸对苯二甲酸 荧光 苯甲醛 

分 类 号：O657.3[理学—分析化学]