Liu Wenjing, Zheng Ping, Xia Yuanxing, Li Feng, Zhang Ming
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China.
Department of Fundamental Study of Public Security, Criminal Investigation Police University of China, Shenyang, 110854, PR China.
Talanta. 2024 Mar 1;269:125352. doi: 10.1016/j.talanta.2023.125352. Epub 2023 Nov 10.
The threat from pesticide trifluralin residues to ecological environment and public health is becoming a growing problem. Thus, rapid and sensitive detection, particularly a simple and portable detected platform for trifluralin residues, are highly desired. Here, a small organic aggregation-induced emission (AIE) molecule (TPETPy) is facilely synthesized and applied to detect trifluralin both in lab and in actual water systems. Based on the photo-induced electron transfer (PET) mechanism, the emissive peak of TPETPy located at 475 nm in tetrahydrofuran (THF)/water mixture (ƒ = 90 %) under the excitation of 340 nm, decreases dramatically upon trace trifluralin addition and exhibits ultra-fast response (3 s), high sensitivity and selectivity, and good anti-interference ability. The fluorescence sensing correlation with the concentration of trifluralin shows good linearity in the range of 20-90 μg L with the limit of detection of 6.28 μg L. Moreover, a portable smartphone-integrated detected platform based on fluorescent pattern Red/Green/Blue (RGB) values is first employed to realize the real-time and on-site quantitative fluorescent detection of trifluralin in actual water sources, featuring good accuracy and reproducibility. Hereby, this work provides not only a highly efficient trifluralin residues fluorescent probe but also a portable and straightforward operating platform to detect trifluralin pesticides quantitatively.
农药氟乐灵残留对生态环境和公众健康的威胁日益严重。因此，快速、灵敏的检测，特别是一种简单便携的氟乐灵残留检测平台，成为迫切需求。在此，一种小型有机聚集诱导发光（AIE）分子（TPETPy）被简便合成，并应用于实验室和实际水系统中检测氟乐灵。基于光诱导电子转移（PET）机制，在340 nm激发下，TPETPy在四氢呋喃（THF）/水混合物（ƒ = 90%）中位于475 nm的发射峰，在加入痕量氟乐灵后显著降低，并表现出超快响应（3 s）、高灵敏度和选择性以及良好的抗干扰能力。氟乐灵浓度与荧光传感的相关性在20 - 90 μg L范围内呈现良好线性，检测限为6.28 μg L。此外，首次采用基于荧光模式红/绿/蓝（RGB）值的便携式智能手机集成检测平台，实现实际水源中氟乐灵的实时现场定量荧光检测，具有良好的准确性和重现性。据此，本工作不仅提供了一种高效的氟乐灵残留荧光探针，还提供了一个便携式且操作简便的平台来定量检测氟乐灵农药。
