A Multifunctional Fluorescence Europium-Organic Framework for Turn-On Sensing of pH and Turn-Off Sensing of 2-Thiazolidinethione-4-carboxylic Acid and Aztreonam  

作　　者：Zhenqi Tan Yue Quan Yufen Li Tao Yang Xinhui Zhou Yujian You 

机构地区：[1]Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors,Institute of Advanced Materials(IAM),Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing University of Posts&Telecommunications,Nanjing,Jiangsu,210023 China

出　　处：《Chinese Journal of Chemistry》2023年第3期265-272,共8页中国化学（英文版）

基　　金：supported by the National Natural Science Foundation of China (21973047 and 62074082);Jiangsu Province Double Innovation Talent Program (090300014001).

摘　　要：A luminescent lanthanide-organic framework[Eu_(2)(adip)(H_(2)adip)(DMF)_(2)]·CH_(3)OH(1)was synthesized by a solvothermal method using anthracene-based ligand 5,5’-(anthracene-9,10-diyl)diisophthalic acid(H4adip).1 possesses a 3D coordination framework,which could be rationalized as a 4,8-connected 2-nodal(4^(16)6^(12))(4^(4)6^(2))topological network.1 shows an excellent linear increase in fluorescence intensity as the pH value rises from 4.8 to 7.1.Particularly,the fluorescence enhancement percentage reaches 588%for each increase of pH value,which is the highest value recorded for fluorescence pH sensing materials,promoting the sensitivity of pH detection within the physiological pH range.In addition,1 can also specifically recognize carbon disulfide biomarkers 2-thiothiazolidine-4-carboxylic acid(TTCA)and antibiotic aztreonam(ATM)by fluorescence quenching,with the KSV values of 1.02×10^(5)L·mol^(-1)(0-10μmol·L^(-1))and 4.67×10^(5)L·mol^(-1)(0-50μmol·L^(-1)),the limit of detection(LOD)of 86 nmol·L^(-1)and 19 nmol·L^(-1),respectively.Among only a few cases reported,the detection sensitivities of 1 for both TTCA and ATM are the highest.The sensing mechanisms of pH,TTCA,and ATM are also discussed in detail.

关 键 词：Metal-organic framework FLUORESCENCE Sensors Antibiotic Absorption 3D 

分 类 号：O657.3[理学—分析化学]