Chen Qianmiao, Wen Guiqing, Liang Aihui, Jiang Zhiliang
Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Guangxi Normal University, Ministry of Education, Guilin 541004, China.
Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China.
Langmuir. 2024 Mar 19;40(11):5753-5763. doi: 10.1021/acs.langmuir.3c03457. Epub 2024 Mar 4.
With four nanoparticles as the nanomatrix, dinotefuran (DNF) as the template molecule, -isopropylacrylamide as the functional monomer, trimethylolpropane and trimethacrylate as the cross-linker, four nanosurface molecularly imprinted polymer (MIP) bifunctional probes were prepared by microwave synthesis. It was found that palladium nanosurface MIP (Pd@MIP) not only recognized DNF but also had the strongest catalytic effect on the new nanogold indicator reaction of acrylic acid-HAuCl, which was evaluated quickly with the slope procedure developed by us. The generated gold nanoparticles (AuNPs) not only possessed the resonance Rayleigh scattering (RRS) effect but also strong surface-enhanced Raman scattering (SERS) activity. The combination of Pd@MIP with DNF enhanced the catalytic effect by coupling the nanosurface electrons with π-electrons, thus enhancing both scattering signals. A new Pd@MIP nanoprobe catalytic-SERS/RRS dual-mode analytical platform was developed for the specific and sensitive detection of DNF. The linear ranges of the SERS and RRS methods were 0.075-0.75 and 0.1-0.75 nmol/L, and the limits of detection were 0.03 and 0.06 nmol/L, respectively. The standard deviations were 0.54-2.39%, and the recoveries were 93-105%.
以4种纳米粒子为纳米基质，呋虫胺（DNF）为模板分子，N-异丙基丙烯酰胺为功能单体，三羟甲基丙烷三甲基丙烯酸酯为交联剂，通过微波合成法制备了4种纳米表面分子印迹聚合物（MIP）双功能探针。研究发现，钯纳米表面MIP（Pd@MIP）不仅能识别DNF，而且对丙烯酸-HAuCl新型纳米金指示剂反应具有最强的催化作用，采用我们建立的斜率法可快速进行评估。生成的金纳米粒子（AuNPs）不仅具有共振瑞利散射（RRS）效应，还具有很强的表面增强拉曼散射（SERS）活性。Pd@MIP与DNF的结合通过纳米表面电子与π电子的耦合增强了催化作用，从而增强了两种散射信号。构建了一种新型的Pd@MIP纳米探针催化-SERS/RRS双模式分析平台，用于特异性、灵敏地检测DNF。SERS和RRS方法的线性范围分别为0.075～0.75和0.1～0.75 nmol/L，检测限分别为0.03和0.06 nmol/L。标准偏差为0.54%～2.39%，回收率为93%～105%。
