Feng Tian, Chen Zhenkun, Cheng Xiaomin
Key Laboratory Environment-Friendly Polymer Materials of Anhui Province, School of Chemistry and Chemical Engineering, Hefei, 230601, China.
J Fluoresc. 2025 Apr;35(4):1927-1936. doi: 10.1007/s10895-024-03634-8. Epub 2024 Mar 9.
A novel nanocomposite fluorescent probe consisting of quantum dots and a silica molecularly imprinted polymer (MIPs-capped ZnS:Mn QDs) was synthesized and applied for the rapid detection of teflubenzuron (TBZ) based on the fluorescence quenching of a composite probe via TBZ. The fluorescence quenching efficiency of MIP@SiO2@ZnS:Mn QDs displayed a linear relationship over the concentration range of 0-26.24 μmol/L with a correlation coefficient of 0.9857 and the limit of detection was 2.4 μg/L. The selectivity test showed that the nanocomposite had good selectively rebind TBZ with higher imprinting factor of 3.06 compared with four structurally similar compounds. In addition, the probe was successfully applied to the detection of TBZ in vegetable samples with a recovery of 90.3~97.1% and with a relative standard deviation below 3.2%. This developed method has the advantages of simple preparation, fast response and low toxicity for trace TBZ detection.
合成了一种由量子点和二氧化硅分子印迹聚合物组成的新型纳米复合荧光探针（MIP包覆的ZnS:Mn量子点），并基于该复合探针被氟铃脲（TBZ）荧光猝灭的原理，将其应用于氟铃脲的快速检测。MIP@SiO2@ZnS:Mn量子点的荧光猝灭效率在0 - 26.24 μmol/L浓度范围内呈线性关系，相关系数为0.9857，检测限为2.4 μg/L。选择性测试表明，与四种结构相似的化合物相比，该纳米复合材料对TBZ具有良好的选择性重结合能力，印迹因子高达3.06。此外，该探针成功应用于蔬菜样品中TBZ的检测，回收率为90.3%~97.1%，相对标准偏差低于3.2%。该方法制备简单、响应快速、对痕量TBZ检测毒性低。
