An in-situ strategy to construct uracil-conjugated covalent organic frameworks with tunable fluorescence/recognition characteristics for sensitive and selective Mercury(II) detection.

Autor: Deng XR; School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, PR China., Hu AW; School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, PR China., Hu SQ; School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, PR China., Yang WL; School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, PR China., Sun C; School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, PR China., Xiao SJ; State Key Laboratory of Nuclear Resources and Environment, East China University of Technology (ECUT), Nanchang, 330013, PR China., Yang GP; School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, PR China., Zheng QQ; School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, PR China., Liang RP; School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, PR China., Zhang L; School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, PR China. Electronic address: zhangli8@ncu.edu.cn., Qiu JD; School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, PR China; State Key Laboratory of Nuclear Resources and Environment, East China University of Technology (ECUT), Nanchang, 330013, PR China. Electronic address: jdqiu@ncu.edu.cn.
Jazyk: angličtina
Zdroj: Analytica chimica acta [Anal Chim Acta] 2023 Apr 29; Vol. 1252, pp. 341056. Date of Electronic Publication: 2023 Mar 06.
DOI: 10.1016/j.aca.2023.341056
Abstrakt: Previous researches of covalent organic frameworks (COFs) have shown their potential as fluorescent probes, but the regulation of their optical properties and recognition characteristics still remains a challenge, and most of reports required complicated post-decoration to improve the sensing performance. In this context, we propose a novel in-situ strategy to construct uracil-conjugated COFs and modulate their fluorescence properties for sensitive and selective mercury(II) detection. By using 1,3,6,8-tetrakis(4-formylphenyl)pyrene (TFPPy) and 1,3,6,8-tetrakis(4-aminophenyl)pyrene (TAPPy) as fundamental blocks and 5-aminouraci (5-AU) as the functional monomer, a series of COFs (Py-COFs and Py-U-COFs-1 to Py-U-COFs-5) with tunable fluorescence were solvothermally synthesized through an in-situ Schiff base reaction. The π-conjugated framework serves as a signal reporter, the evenly and densely distributed uracil acts as a mercury(II) receptor, and the regular pores (channels) make the rapid and sensitive detection of the mercury(II) possible. In this research, we manage to regulate the crystalline structure, the fluorescence properties, and the sensing performance of COFs by simply changing the molar ratio of precursors. We expect this research to open up a new strategy for effective and controllable construction of functionalized COFs for environmental analysis.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: