基于金属有机骨架材料Tb^3+@UiO-67-bpydc的宽范围pH荧光传感器  

A Wide Range pH Fluorescence Sensor Based on Metal Organic Framework Tb^3+@UiO-67-bpydc

作　　者：吴舜华 孙羽乘 郭小峰[1] 王红[1] WU Shunhua;SUN Yucheng;GUO Xiaofeng;WANG Hong(College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072)

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《分析科学学报》2020年第5期741-746,共6页Journal of Analytical Science

基　　金：国家自然科学基金(No.31670370,21777126)。

摘　　要：以2,2'-联吡啶作为有机配体,Zr_6簇为节点,合成了一种稳定的UiO型骨架UiO-67-bpydc(bpydc=2,2'-联吡啶-5,5'-二羧酸),通过合成后修饰的方法将Tb^3+包封到UiO-67-bpydc中,制备了pH荧光传感材料Tb^3+@UiO-67-bpydc。其结构用扫描电镜、粉末X射线衍射等方法表征,并利用荧光光谱测试了该材料对pH的响应,结果表明,Tb^3+@UiO-67-bpydc不仅具有良好的化学稳定性和光稳定性,且在2~9的宽的pH范围内,荧光强度与pH之间展现出良好的线性关系。该材料已成功应用于检测实际样品的pH值。A stable UiO-67-bpydc was synthesized with 2,2 ′-bipyridine as the organic ligand and Zr6 cluster as the vertexes.Tb3 + was encapsulated into UiO-67-bpydc(bpydc:2,2-Bipyridine-5,5′-dicarboxylic acid) by post synthesis modification(PSM),and a pH fluorescence sensor Tb3+@UiO-67-bpydc was prepared.The structure was characterized by SEM and PXRD.Meanwhile,its response to pH was measured by fluorescence spectrum.The results showed that Tb3+@UiO-67-bpydc was of good chemical stability and light stability,and an excellent linearity between fluorescence intensity and pH was observed in a wide pH range of 2-9.Besides,this material has been successfully applied to the detection of the pH values of actual samples with high selectivity.

关 键 词：金属有机骨架 荧光传感器 pH 

分 类 号：O657.39[理学—分析化学]