Abstract
Controllable synthesis of micro-flower covalent organic frameworks (MFCOFs) with controllable size, monodisperse, spherical, and beautiful flower shape was realized by using 2,5-diformylfuran (DFF) and p-phenylenediamine (p-PDA) as building blocks at room temperature. High-quality MFCOFs (5 − 7 μm) were synthesized by controlling the kind of solvent, amounts of monomers, catalyst content, and reaction time. The synthesized MFCOFs possessed uniform mesopores deriving from the intrinsic pores of frameworks and wide-distributed pores belonging to the gap between the petals. The MFCOFs-packed solid-phase extraction (SPE) column shows adsorption capacity of about 8.85 mg g−1 for 2,4-dichlorophenol (2,4-DCP). The MFCOF-based SPE combined with the HPLC method was established for the determination of 2,4-DCP in environmental water. The linear range of this method is 20–1000 ng mL−1 (R2 > 0.9994), and limit of detection (S/N = 3) is 10.9 ng mL−1. Spiked recoveries were 94.3–98.5% with relative standard deviations lower than 2.3%.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This research was supported by the Natural Science Foundation of Guangxi Zhuang Autonomous Region (No. 2020GXNSFDA297025 and 2023GXNSFBA026177), Specific Research Project of Guangxi for Research Bases and Talents (AD22035150).
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Guangping Xia and Haoyun Hu contributed equally to this work. The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript.
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Xia, G., Hu, H., Huang, Y. et al. Controllable synthesis of uniform flower-shaped covalent organic framework microspheres as absorbent for solid-phase extraction of trace 2,4-dichlorophenol. Microchim Acta 191, 91 (2024). https://doi.org/10.1007/s00604-024-06178-7
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DOI: https://doi.org/10.1007/s00604-024-06178-7