Lv Xiaodong, Gao Peng
School of Electrical Engineering and Control Science, Nanjing Tech University Nanjing 211899 China
School of Electrical Engineering, Tongling University Tongling 244000 China.
RSC Adv. 2020 Jul 3;10(42):25402-25407. doi: 10.1039/d0ra03708g. eCollection 2020 Jun 29.
Based on the electron-transfer mechanism between the template and quantum dots (QDs), an optical sensor was structured. It is a phenol sensor, which has the room-temperature phosphorescence (RTP) property of Mn-doped ZnS QDs and high selectivity of molecular imprinted polymers (MIPs). On the surface of the silane modified Mn-doped ZnS QDs, the phenol sensor was prepared by double cross-linker precipitation polymerization in the absence of any stabilizer and additive. Double cross-linkers, divinylbenzene (DVB) and ethyleneglycol dimethacrylate (EGDMA), make a great contribution to the imprinted polymerization with hydrogen-bonding interaction. Then, as a result of the functional monomer, methacrylic acid (MAA), a carboxylic acid was grafted onto the surface of ZnS QDs:Mn@MIPs. Under optimal conditions, the phenol determination experiment had a linear range of 5.0 to 55 μmol L with a correlation coefficient of 0.9984, and a high imprinting factor (IF) of 3.43. In addition, the prepared ZnS QDs:Mn@MIPs were successfully used to detect phenol in real water samples. Therefore, this work provided a highly selective and sensitive RTP probe for phenol determination.
基于模板与量子点（QDs）之间的电子转移机制，构建了一种光学传感器。它是一种苯酚传感器，具有掺锰硫化锌量子点的室温磷光（RTP）特性和分子印迹聚合物（MIPs）的高选择性。在硅烷修饰的掺锰硫化锌量子点表面，通过双交联剂沉淀聚合在无任何稳定剂和添加剂的情况下制备了苯酚传感器。双交联剂二乙烯基苯（DVB）和乙二醇二甲基丙烯酸酯（EGDMA）通过氢键相互作用对印迹聚合有很大贡献。然后，由于功能单体甲基丙烯酸（MAA），羧酸接枝到了ZnS QDs:Mn@MIPs的表面。在最佳条件下，苯酚测定实验的线性范围为5.0至55 μmol/L，相关系数为0.9984，印迹因子（IF）高达3.43。此外，制备的ZnS QDs:Mn@MIPs成功用于实际水样中苯酚的检测。因此，这项工作为苯酚测定提供了一种高选择性和灵敏的RTP探针。
