The pervasive use of pyrethroids and their potential for bioaccumulation necessitate the development of rapid, broad-spectrum, and field-deployable monitoring tools. A novel sensing strategy using fluorinated silicon quantum dots (FSiQDs) for the indirect detection of pyrethroids was developed by targeting their universal degradation product, 3-phenoxybenzaldehyde (3-PBD). FSiQDs modified with 3,5-difluorophenylhydrazine exhibited superior quenching rate (71.32%) toward 3-PBD through a Schiff base-mediated static quenching mechanism. Under optimized conditions, the sensor achieved a limit of detection (LOD) of 0.28 μM within a 10 min response time. To facilitate on-site analysis, an integrated portable fluorescence detector (PFD) was engineered, demonstrating reliable performance in waters from Taihu, Yangcheng, and Cheng Lakes with recoveries ranging from 96.96% to 102.67%. This work represents the first application of fluorine-doped SiQDs for fluorescence sensing, offering a practical solution for the rapid, broad-spectrum screening of pesticide residues in complex environmental and food matrices.
Thiophenol (PhSH) is a highly toxic aromatic thiol endangering ecosystems, food safety, and human health. Traditional detection methods are limited by instrument dependence and inability for real-time imaging. This study developed a red-emitting fluorescent probe, TTCP-DN, based on the PET mechanism. The probe employs...
Yukun Zhang, Xiaoli Li, Rui-Yuan Liu et al.· Food Chemistry· 0 citations
Tebuconazole (Tbz) is one of the most widely used fungicides in the agricultural field due to its high efficacy, systemic properties, and broad-spectrum activity. However, the presence of excessive Tbz residues can pose a serious threat to both human and animal health. Conventional detection techniques used to monitor...
Shahida Rashid, S. A. Shah, Jigneshkumar V. Rohit· Analytical Methods· 0 citations
In this study, a pyrene-based fluorescent probe (PCPA) was designed, synthesized and developed for the detection of HA. In the presence of HA, PCPA was converted to the oxime derivative (PCO) through a nucleophilic addition–elimination reaction, accompanied by significant enhancement in fluorescence at 408/425 nm. Furt...
Wen‐Jie Zhang, Yi Hu, Yan-Chang Huang et al.· RSC Advances· 0 citations
Thiamethoxam, a widely utilized neonicotinoid insecticide, has been extensively applied in agricultural practices, leading to various adverse effects on human health, such as neurotoxicity, developmental issues, and endocrine disruption. Therefore, establishing a comprehensive and standardized surveillance framework fo...
Nitrogen-doped silicon quantum dots (N-SiQDs) were prepared via a one-pot hydrothermal route, and subsequently utilized to establish a fluorescent sensing system for the rapid determination of chlorogenic acid (CGA). Mechanistic studies revealed a mixed quenching mechanism. The inner filter effect arises from the stron...
Yue Wang, Zhongling Xu, Qing Yang et al.· Spectrochimica Acta Part A -...· 1 citation
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