A novel and visible ratiometric fluorescence determination of carbaryl based on red emissive carbon dots by a solvent-free method  

作　　者：Meiling Xu Xinyang Li Pengyuan Liu Junjun Liu Xiao Han Guodong Chai Shuangling Zhong Bai Yang Liying Cui 

机构地区：[1]College of Resources and Environment,Jilin Agricultural University,Changchun 130118,China [2]State Key Laboratory of Supramolecular Structure and Materials,College of Chemistry,Jilin University,Changchun 130012,China [3]Key Laboratory of Straw Biology and Utilization,The Ministry of Education,Jilin Agricultural University,Changchun 130118,China

出　　处：《Chinese Chemical Letters》2025年第2期286-290,共5页中国化学快报(英文版)

基　　金：supported by the Natural Science Foundation of the Science and Technology Department of Jilin Province(No.20220101086JC)。

摘　　要：In this study,a simple and effective ratiometric fluorescence method has been developed for carbaryl detection,utilizing red emissive carbon dots(R-CDs).The underlying principle of this proposed strategy relies on the rapid hydrolysis of carbaryl under an alkaline condition and production of 1-naphthol with blue-emission at 462 nm.Furthermore,the as-synthesized R-CDs(Em.677 nm),serve as a reference,enhancing the visual tracking of carbaryl through the transformation of fluorescent color from red to blue.The concentration of carbaryl exhibits a commendable linear correlation with the ratio of fluorescence intensity,ranging from 0 to 20μg/m L(R^(2)=0.9989)with a low detection limit of 0.52 ng/m L.Additionally,the described methodology can be used for the enzyme-free visual assay of carbaryl,even in the presence of other carbamate pesticides and metal ions,in tap water and lake water samples with excellent accuracy(spiked recoveries,94%-106.1%),high precision(relative standard deviation(RSD)≤2.42),and remarkable selectivity.This fast and highly sensitive naked-eye ratiometric sensor holds immense promise for carbaryl detection in intricate environments and food safety fields.

关 键 词：Carbon dots Visual detection Fluorescence sensor Quantum yield Carbaryl detection 

分 类 号：X832[环境科学与工程—环境工程] O657.3[理学—分析化学]