Exploring fluorescent covalent organic frameworks for selective sensing of Fe^3＋  

作　　者：Lu-Liang Wang Cheng-Xiong Yang Xiu-Ping Yan 

机构地区：[1]College of Chemistry, Research Center for Analytical Sciences, Tianjin Key Laboratory of Molecular Recognition and Biosensing, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China [2]Institute of Analytical Food Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China [3]Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China

出　　处：《Science China Chemistry》2018年第11期1470-1474,共5页中国科学（化学英文版）

基　　金：supported by the National Basic Research Program of China (2015CB932001);the National Natural Science Foundation of China (21775056, 21777074);the Fundamental Research Funds for Central Universities (JUSRP51714B);Open Funds of the State Key Laboratory of Electroanalytical Chemistry (SKLEAC201705)

摘　　要：Covalent organic frameworks （COFs） have been widely applied in gas capture and separation, but the fluorescent property of COFs with large n-conjugated system tends to be underexplored. Here we report the fluorescent properties of several COFs including TaTa, DhaTab, TRITER- 1 and TzDa and the effect of metal ions of Na＋, Mg2＋, K＋, Ca2＋, Cu2＋, Zn2＋, Pb2＋, Ag＋, Cd2＋ and Fe3＋ on the fluorescence of these COFs. The results show that only Fe3＋ significantly quenched the fluorescence of the studied COFs. The possibility of the four COFs for selective sensing of Fe3＋ was demonstrated. The possible mechanism of the effect of Fe3＋ on the fluorescence of the COFs was based on the absorption competition quenching.Covalent organic frameworks(COFs) have been widely applied in gas capture and separation, but the fluorescent property of COFs with large π-conjugated system tends to be underexplored. Here we report the fluorescent properties of several COFs including TaTa, DhaTab, TRITER-1 and TzDa and the effect of metal ions of Na+, Mg^(2+), K+, Ca^(2+), Cu^(2+), Zn^(2+), Pb^(2+), Ag+, Cd^(2+)and Fe^(3+)on the fluorescence of these COFs. The results show that only Fe^(3+)significantly quenched the fluorescence of the studied COFs. The possibility of the four COFs for selective sensing of Fe^(3+)was demonstrated. The possible mechanism of the effect of Fe^(3+)on the fluorescence of the COFs was based on the absorption competition quenching.

关 键 词：FLUORESCENCE covalent organic frameworks iron ion fluorescent probe 

分 类 号：O657.3[理学—分析化学]