Posted by Microporous organic networks (MONs) are attractive adsorbents for use in sample pretreatment owning to their unique structure and properties. However, methods for constructing functional MONs are still limited because the lack of monomers via direct synthesis and their complex procedures via post-modification. To address this issue, a facile one-pot in situ doping strategy was proposed herein for synthesis a novel phenylboronic acid-functionalized magnetic cyclodextrin-based microporous organic network ([PBA]3/4-MCD-MON-0.04) (PBA=phenylboronic acid). [PBA]3/4-MCD-MON-0.04 was used for the selective and efficient magnetic solid-phase extraction (MSPE) of sulfonylurea herbicides (SUHs), such as thifensulfuron-methyl (THSM), metsulfuron-methyl (MSM), and halosulfuron-methyl (HSM) from complex food and environmental water samples via the synergistic hydrogen bonding, host-guest, hydrophobic and π-π interactions and the specific B-N coordination. [PBA]3/4-MCD-MON-0.04 had a large surface area, high saturation magnetism, good reusability, and remarkable stability. A rapid, sensitive, and selective method was proposed for monitoring SUHs from diverse matrices, such as complex food and water samples. This study provides a new strategy for synthesizing novel and multifunctional magnetic CD-MONs-based adsorbents and reveals the considerable potential of CD-MONs in sample pretreatment.
A facile one-pot in situ doping strategy is developed to prepare a novel magnetic PBA-functionalized CD-MON for selective extraction of trace SUHs from complex food and environmental water samples.
Chun-Ying Xu, Xiao-Lin Luan, Yuan-Yuan Cui, Cheng-Xiong Yang (2025) One-pot in situ doping synthesis of phenylboronic acid-functionalized magnetic-cyclodextrin microporous organic network for specific enrichment and detection of sulfonylurea herbicides. Chinese Chemical Letters 110937
https://doi.org/10.1016/j.cclet.2025.110937.