基于嵌入碳点的分子印迹硅胶的新型光学传感器用于选择性检测吡虫啉。
A novel optical sensor based on carbon dots embedded molecularly imprinted silica for selective acetamiprid detection.
机构信息
Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2019 Mar 5;210:36-43. doi: 10.1016/j.saa.2018.08.030. Epub 2018 Aug 17.
A molecularly imprinted polymer (MIP) on silane-doped carbon dots (Si-CDs) has been synthesized as a novel optical sensor for selective detection of acetamiprid (ACT). Highly fluorescence Si-CDs have been first prepared by hydrothermal method. Subsequently, MIP has been formed on the surface of Si-CDs (MIP@Si-CDs) by a sol-gel process. The properties and structure of the Si-CDs and MIP@Si-CD nanocomposites have been characterized by fluorescence spectroscopy, UV-Vis absorption spectroscopy, transmission electron microscopy, dynamic light scattering, Fourier transform infrared spectroscopy, and X-ray diffraction techniques. Various parameters, which affect the optical signal, have been optimized. The fluorescence signal of MIP@Si-CDs showed linear response with ACT concentration in the 7-107 nM range with a detection limit of 2 nM and a precision of 2.7% and 3.3% for five replicate detections of 17 and 33 nM ACT under optimal conditions. In addition, the sensor has been satisfactorily utilized for the detection of ACT content in real samples.
一种基于硅掺杂碳点（Si-CDs）的分子印迹聚合物（MIP）已被合成，作为一种用于选择性检测乙虫腈（ACT）的新型光学传感器。首先通过水热法制备了高荧光性 Si-CDs。随后，通过溶胶-凝胶过程在 Si-CDs 表面形成了 MIP（MIP@Si-CDs）。通过荧光光谱、紫外-可见吸收光谱、透射电子显微镜、动态光散射、傅里叶变换红外光谱和 X 射线衍射技术对 Si-CDs 和 MIP@Si-CD 纳米复合材料的性质和结构进行了表征。优化了影响光学信号的各种参数。在最佳条件下，MIP@Si-CDs 的荧光信号在 7-107 nM 范围内对 ACT 浓度表现出线性响应，检测限为 2 nM，对 17 和 33 nM ACT 的五次重复检测的精度分别为 2.7%和 3.3%。此外，该传感器已成功用于实际样品中 ACT 含量的检测。
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