硅球表面制备荧光分子印迹聚合物检测高效氟氯氰菊酯的研究

采用沉淀聚合法制备了以高效氟氯氰菊酯(Beta-cyhalothrin,BC)为模板分子的荧光分子印迹聚合物。以甲基丙烯酸甲酯为功能单体,三羟甲基丙烷三甲基丙烯酸酯作为交联剂。通过红外光谱、紫外光谱、扫描电镜、透射电镜、热重分析证明已成功地合成荧光分子印迹聚合物微球,并且具有良好的球形形貌(微球粒径约为200 nm,印迹层厚度约为20nm)、良好的单分散性和卓越的热稳定性。通过荧光检测实验可知,荧光强度与BC的浓度呈线性关系并建立了线性回归方程:I0/I-1=0.004 1c-0.018 6,R2=0.983 7,检出限为13.251 nmol/L。通过选择性实验说明,荧光分子印迹聚合物对BC具有较好的特异性识别性能。

Detection of Beta-cyhalothrin by a Core-shell Spherical SiO2-based Surface Fluorescent Molecularly Imprinted Polymer

In this work,fluorescent molecularly imprinted polymers(FMIPs) was synthesized via precipitation polymerization.Betacyhalothrin(BC) as the target molecule,methyl methacrylate(MMA) as the functional monomer,3-trimethylolpropane trimethacrylate(TRIM) as the cross linker.The characteristic of material has been measured by FTIR,UV,SEM,TEM,TGA.The resulting FMIPs are monodispersed sphere(average diameter and shell thickness of as-synthesized microspheres were 200 and 20 nm),and they have good thermal stability.The FMIPs is quenched specifically by BC by fluorescence detection.The linear range describe by the Stern-Volmer equation is I0/I-1 =0.004 1c-0.018 6,R2 =0.983 7.A lower limit of detection (LOD) is 13.251 nmol/L.It is demonstrated that high selectivity of FMIPs towards BC by selective detection.