An innovative molecular imprinted polymer based on KH-570 modified SiO₂-coated cadmium telluride quantum dots was prepared as fluorescence sensor for sulfadimidine (SM₂) sensitive and selective detection. The quantum dots were firstly encapsulated in silica by sol–gel process, and then the double bond was modified on the surface of silica with KH-570. Finally, the molecular imprinted layer was synthesized on the surface of silica by template molecule, methacrylic acid (MAA) and ethylene glycol dimethyl acrylate. The fluorescence sensors showed good structure when characterized by SEM. Besides, the fluorescence sensors showed a good linear range from 10 to 80 μmol^.L⁻¹ with a lower LOD of 0.42 μmol^.L⁻¹. These sensors were successfully applied to detect SM₂ in the water samples with a recovery rate from 91.6% to 97.8% and the relative standard deviation less than 2.5%, indicating that fluorescence sensors have the potential application in the detection of real samples.

制备了一种基于 KH-570 改性 SiO ₂包覆碲化镉量子点的创新分子印迹聚合物作为磺胺二甲嘧啶 (SM ₂ ) 灵敏和选择性检测的荧光传感器。首先通过溶胶-凝胶工艺将量子点封装在二氧化硅中，然后用 KH-570 在二氧化硅表面修饰双键。最后，通过模板分子、甲基丙烯酸（MAA）和乙二醇丙烯酸二甲酯在二氧化硅表面合成分子印迹层。当用SEM表征时，荧光传感器显示出良好的结构。此外，荧光传感器在 10 至 80 μmol 之间显示出良好的线性范围^。L ^-1具有 0.42 μmol 的较低 LOD ^。升^-1。这些传感器成功应用于检测水样中的SM ₂，回收率从91.6%到97.8%，相对标准偏差小于2.5%，表明荧光传感器在实际样品的检测中具有潜在的应用价值。