Nitrogen-doped carbon dots as efficient turn-on fluorescent probe for assay of organophosphorus pesticides  

作　　者：Jiqing Zhang Shushu Chu Chenyu Tao Jinghao Yan Yuanyuan Jiang Yizhong Lu 

机构地区：[1]School of Materials Science and Engineering,University of Jinan,Jinan 250022,China

出　　处：《ChemPhysMater》2024年第4期462-469,共8页化学物理材料（英文）

基　　金：supported by the National Natural Science Foundation of China(22172063 and 21902062);Young Taishan Scholar Program(tsqn201812080);Independent Cultivation Program of Innovation Team of Ji’nan City(2021GXRC052).

摘　　要：Concerns regarding human health and food safety have generated interest in developing simple,accurate,and cost-effective strategies for evaluating organophosphorus pesticide(OP)residues.In this study,nitrogen-doped carbon dots(N-CDs)were synthesized from a common low-cost precursor via a simple pyrolysis process.The fluorescence of the N-CDs can be suppressed by p-nitrophenol,which is the hydrolysis product of the p-nitrophenyl phosphate salt catalyzed by alkaline phosphatase(ALP).A fluorescent turn-on assay for the inhibitory effect of glyphosate was developed with a low detection limit and wide linear range.Moreover,the feasibility of visualizing OPs in vegetables was demonstrated by the fluorescence imaging of glyphosate on cabbage leaves.This research not only offers a facile method for the synthesis of highly fluorescent CDs but also inspires the development of effective multi-mode sensing platforms that include fluorescent testing and imaging for monitoring pesticide residues.

关 键 词：Nitrogen-doped carbon dots Alkaline phosphatase Organophosphorus pesticides Logic gates Fluorescence imaging 

分 类 号：O62[理学—有机化学]