罗丹明B-锆基金属有机框架复合材料高选择性荧光检测铁离子  

Integration of Rhodamine B into Zirconium-based Metal-organicFramework for Selective Detection of Ferric Ion

作　　者：陈阳 赵杰 张嘉惠 李静 杜佩瑶 卢小泉 CHEN Yang;ZHAO Jie;ZHANG Jia-Hui;LI Jing;DU Pei-Yao;LU Xiao-Quan(Tianjin Key Laboratory of Molecular Optoelectronic Science,Department of Chemistry,School of Science,Tianjin University,Tianjin 300072,China;Key Laboratory of Bioelectrochemistry&Environmental Analysis of Gansu Province,College of Chemistry&Chemical Engineering,Northwest Normal University,Lanzhou 730070,China)

机构地区：[1]天津大学理学院化学系,天津市分子光电科学重点实验室,天津300072 [2]西北师范大学化学化工学院,甘肃省生物电化学与环境分析重点实验室,兰州730070

出　　处：《分析化学》2021年第4期642-651,共10页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(Nos.21705117,22001193);甘肃省高等教育研究计划项目(No.2017-D-01);中央引导地方科技发展专项资金(2020)资助。

摘　　要：罗丹明B(RhB)染料用于荧光检测时通常不具有选择性,限制了其在分析传感中的应用。本研究合成了一种将RhB包封在锆基金属有机框架(PCN-777)孔道中的复合材料(RhB@PCN-777),用于水体中Fe 3+的特异性检测。与单独的RhB相比,RhB@PCN-777的光稳定性有所提高,并且在检测过程中减少了其它离子的干扰。RhB@PCN-777复合材料在水相中发射黄色荧光。在pH=6.0的条件下,RhB@PCN-777可以高灵敏度、高选择性检测Fe^(3+),检出限为0.16μmol/L。实际水样中Fe^(3+)的加标回收率为94.2%~103.9%,表明本方法在实际样品检测中具有良好的实用性。Rhodamine B(RhB)dyes usually have no selectivity in fluorescence detection of Fe 3+,which limits their application in analytical detection.In this study,a composite material(RhB@PCN-777)with RhB encapsulated in a zirconium-based organic framework(PCN-777)channel was synthesized and applied to the specific detection of Fe 3+in water.Compared with free RhB,RhB@PCN-777 exhibited drastically improved fluorescence stability and high selectivity for the determination of Fe 3+.RhB@PCN-777 composite featured a yellow emission at 586 nm when dispersed in aqueous solution,which could detect Fe 3+in water with high sensitivity and selectivity,with a detection limit as low as 0.16μmol/L.Moreover,RhB@PCN-777 was successfully used to detect Fe 3+in real water samples with recoveries ranging from 94.2%to 103.9%,indicating that the fluorescent probe had high reliability in actual environmental aqueous samples.

关 键 词：荧光传感 金属有机框架 铁离子 罗丹明B 选择性 

分 类 号：TB333[一般工业技术—材料科学与工程] X832[环境科学与工程—环境工程] O657.3[理学—分析化学]