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Exploring fluorescent covalent organic frameworks for selective sensing of Fe3+

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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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Acknowledgements

This work was 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), and Open Funds of the State Key Laboratory of Electroanalytical Chemistry (SKLEAC201705).

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Authors and Affiliations

  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

    Lu-Liang Wang, Cheng-Xiong Yang & Xiu-Ping Yan

  2. Institute of Analytical Food Safety, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China

    Xiu-Ping Yan

  3. Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300071, China

    Xiu-Ping Yan

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  1. Lu-Liang Wang
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  2. Cheng-Xiong Yang
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  3. Xiu-Ping Yan
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Correspondence to Xiu-Ping Yan.

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Wang, LL., Yang, CX. & Yan, XP. Exploring fluorescent covalent organic frameworks for selective sensing of Fe3+. Sci. China Chem. 61, 1470–1474 (2018). https://doi.org/10.1007/s11426-018-9253-3

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  • DOI: https://doi.org/10.1007/s11426-018-9253-3

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