亚胺
光致发光
共轭体系
超分子化学
化学
光化学
组合化学
材料科学
有机化学
分子
光电子学
聚合物
催化作用
作者
Xiaolong Hu,Haibo Sun,Yi Jiang,Xiang Xiao,Yunshan Liang,Ming Lei,Yuan Yang,Jiachao Zhang,Pufeng Qin,Lin Luo,Zhibin Wu
标识
DOI:10.1016/j.foodchem.2024.140688
摘要
As the contamination and enrichment in food chain of levofloxacin (LV) antibiotics have caused a significant threat to life safety, the instant detection of LV has become an urgent need. Here, a PDI-functionalized imine-based covalent organic framework (PDI-COF300) was prepared by the electrostatic self-assembly method as fluorescent probe for smartphone visual detection of LV, which exhibited excellent fluorescence quantum yield (82.68%), greater stability, high sensitivity with detection limit of 0.303 μM. Based on the results of molecular docking and Stern-Volmer equation, the LV detection by PDI-COF300 was mainly a static quenching process through π-π stacked hydrophobic interactions and fluorescence resonance energy transfer. Besides, PDI-COF300 was applied to LV detection in environmental medium and milk samples with recoveries from 85.56% to 108.34% and relative standard deviations <2.70%. This work also provided a new general strategy for using PDI-COF in smartphone devices and fluorescent papers for LV fluorescence detection and microanalysis.
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