Ratiometric fluorescent detection of carbendazim in foods based on metallic nanoclusters self-assembled nanocomplex

作者：Xiujin Chen, Guowen Li, Yue Xin, Chifang Peng, Jun Wang · 发表于：Food Chemistry · 年份：2023 · DOI：10.1016/j.foodchem.2023.136478 · 被引用次数：31 · 研究领域：Nanocluster Synthesis and Applications、Carbon and Quantum Dots Applications、Advanced Nanomaterials in Catalysis

Indicator replacement assay combining with fluorescence resonance energy transfer (FRET) effect has attractive performance in sensing small molecules, however, there wasn't application in pesticide molecule sensing reported so far. In this work, we prepared a nanocomplex (NCP), AuAgNCs-CD, through self-assembly of gold nanoclusters (AuNCs), silver nanoclusters (AgNCs) and carboxymethyl-β-cyclodextrin (CM-β-CD) by one-step method. The emission of AuNCs was significantly enhance. It was found that FRET between the AuAgNCs-CD and rhodamine B (RhB) existed after AuAgNCs-CD combined with RhB. And carbendazim (CBZ) could induce anti-FRET effect through competing with RhB and binding to AuAgNCs-CD. Thus, this phenomenon was utilized to develop a ratiometric fluorescent detection of CBA. This method was applied in food sample detection and reliable results were obtained. Due to high sensitivity, rapidness and good selectivity, this ratiometric fluorescent method was expected to hold high application potential in monitoring CBZ in foods.