荧光
分子印迹聚合物
检出限
碲化镉光电
单体
量子点
聚合物
肉眼
化学
材料科学
纳米技术
色谱法
有机化学
选择性
催化作用
物理
量子力学
作者
Yeqing Xu,Ting Huang,Bo Hu,Minjia Meng,Yongsheng Yan
标识
DOI:10.1016/j.microc.2021.106899
摘要
Molecular imprinted ratiometric fluorescent analysis method has been a popular method for the quantitative and qualitative tests of target analysis yet encounters low detection efficiency caused by the deep embedment and uneven distribution of fluorescent monomers, even the embedding rate of fluorescent monomer directly affects the visual detection effect. Herein, the ratiometric fluorescent molecularly imprinted polymers (F-PDA/CdTe QDs[email protected]2@MIPs) based fluorescent polydopamine (F-PDA) and CdTe quantum dots (CdTe QDs) was successfully synthesized to detect p-nitrophenol (p-NP) selectively and visually. F-PDA was firstly used in the synthesis of ratiometric fluorescent molecularly imprinted polymers to serve as both fluorescent monomer and functional monomer, which greatly shorten the detection time while reducing the fluorescence loss caused by polymer coating. The test results showed that the p-NP quenched the fluorescent of F-PDA via electron transfer. Meanwhile, F-PDA/CdTe [email protected]2@MIPs enabled to visually detect a low detection limit of p-NP (56.68 nM) within 2.0 min by naked eyes. The detection time was as fast as quantum dots detect targets directly and the detection limit was well below the standard concentration of p-NP in drinking water. Finally, the F-PDA/CdTe [email protected]2@MIPs realize the detection of p-NP in the drinking and wastewater respectively.
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