Exploring fluorescent covalent organic frameworks for selective sensing of Fe3+ |
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| Authors: | Lu-Liang Wang Cheng-Xiong Yang Xiu-Ping Yan |
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| Affiliation: | 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,China;2.Institute of Analytical Food Safety, School of Food Science and Technology,Jiangnan University,Wuxi,China;3.Collaborative Innovation Center of Chemical Science and Engineering,Tianjin,China |
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| Abstract: | 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+, 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. |
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