Colorimetric and ratiometric supramolecular AIE fluorescent probe for the on-site monitoring of fipronil

• Published in: Analyst (London) Vol. 148; no. 21; pp. 5395 - 541
• Main Authors: Ge, Junxu, Wang, Li-Juan, Pan, Xiu, Zhang, Chungu, Wu, Ming-Yu, Feng, Shun
• Format: Journal Article
• Language: English
• Published: London Royal Society of Chemistry 23.10.2023
• Subjects: Colorimetry; Fluorescent indicators; Monitoring; Onsite; Portability; Serum albumin; Test equipment
• ISSN: 0003-2654; 1364-5528
• DOI: 10.1039/d3an01333b

The overuse of fipronil (FPN, a broad-spectrum insecticide) in agriculture has brought great concerns for environmental pollution and food safety. The development of a rapid, reliable, and portable analytical method for the on-site monitoring of FPN is therefore of great significance but is full of challenge. Herein, a novel supramolecular probe using human serum albumin (HSA) as the host and an aggregation-induced emission-active fluorescence probe LIQ-TPA-TZ as the guest was developed for the colorimetric and ratiometric detection of FPN, displaying fast response (30 s), high sensitivity (LOD ∼ 0.05 μM), and good selectivity and anti-interference performance. Moreover, portable paper-based test strips could be facilely obtained and utilized for the determination of FPN, showing colorimetric changes from yellow to orange. This supramolecular probe also demonstrated great potential in real applications for choosing the best cleaning method to reduce the residue rate of FPN on apples. This study provides a versatile tool for the fast and real-time analysis of FPN, which greatly benefits the on-site determination of pesticides with the use of simple testing apparatus. A novel colorimetric and ratiometric supramolecular probe is developed for the on-site detection of FPN with a fast response, high sensitivity, and good selectivity and anti-interference performance.