Selective determination of dimethoate via fluorescence resonance energy transfer between carbon dots and a dye-doped molecularly imprinted polymer
Selective determination of dimethoate via fluorescence resonance energy transfer between carbon dots and a dye-doped molecularly imprinted polymer
复制标题
DOI：
10.1016/j.snb.2014.09.038
复制
发表时间：
2015
影响因子：
8.4
通讯作者：
Shuhuai Li;Jinhui Luo;Guihao Yin;Zhi Xu;Le Yuan;Xiaofang Wu;Nancun Wu;Qun Zhang
中科院分区：
文献类型：
--
作者：
Shuhuai Li;Jinhui Luo;Guihao Yin;Zhi Xu;Le Yuan;Xiaofang Wu;Nancun Wu;Qun Zhang
基于荧光共振能量转移原理，建立了一种测定乐果的分子印迹荧光传感器。首先，通过电聚合制备掺杂的分子模板聚合物。在乐果检测过程中，碳点标记的乐果与乐果之间发生竞争反应。传感器中残留的乐果标记碳量子点与掺杂分子印迹聚合物上的甲基红发生荧光共振能量转移，增强了传感器的荧光信号。当样品中的碳量子点标记的乐果分子被乐果分子取代时，荧光强度降低。在最佳条件下，乐果在6 × 10− 10 ~ 3.4 × 10− 8 mol/L浓度范围内线性关系良好，检出限为1.83 × 10− 11 mol/L。该传感器用于实际样品中乐果的检测，回收率为95.0%~ 106.0%。
A novel molecularly imprinted fluorescent sensor was developed for dimethoate determination based on fluorescence resonance energy transfer. First, a doped molecular template polymer was prepared by electropolymerization. During dimethoate detection, a competitive reaction occurred between dimethoate and carbon dot labeled dimethoate. Fluorescence resonance energy transfer between residual carbon dots labeled dimethoate in the sensor and methyl red on the doped molecularly imprinted polymer then occurred, enhancing the fluorescence signal of the sensor. The fluorescence intensity decreased when the carbon dots labeled dimethoate molecules were replaced by dimethoate molecules in the samples. Under optimal conditions, good linear correlation was obtained for dimethoate over the concentration range from 6 × 10−10mol/L to 3.4 × 10−8mol/L with a detected limit of 1.83 × 10−11mol/L. This sensor was used to detect for dimethoate in actual samples, for which recoveries ranging from 95.0% to 106.0% were obtained.