School of Chemistry and Materials Science, Shanxi Normal University, Taiyuan 030000, China.
School of Chemistry and Materials Science, Shanxi Normal University, Taiyuan 030000, China; Research Institute of Materials Science of Shanxi Normal University & Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and Technology, Taiyuan 030000, China.
Food Chem. 2024 Jan 1;430:137096. doi: 10.1016/j.foodchem.2023.137096. Epub 2023 Aug 6.
The photoluminescent properties of Mn-doped ZnS quantum dots were fully exploited, and room-temperature phosphorescence (RTP)-ratiometric fluorescence (RF) magnetic mesoporous molecularly imprinted polymers (PFMM-MIPs) were prepared by integrating molecular imprinting technology. RTP was used to detect malachite green (MG). The fluorescence at 420 nm and the peak at 590 nm in the fluorescence mode were used as the response reference signals respectively to detect tartrazine (TZ). The linear responsive range and detection limit of MG were 0.01-150 μM and 4.3 nM, and these of TZ were 0.05-80 μM and 23.7 nM. RTP, which can avoid the interference of background fluorescence, and RF with self-calibration ability can both largely weaken the matrix effect. This work enables single-probe-type MIPs to achieve dual-target analysis via RTP and RF. This method provides excellent sensitivity, specificity, recovery and recyclability, and is expected to be prospectively applied in the fields of food, environment and biological analyses.
充分利用了 Mn 掺杂的 ZnS 量子点的光致发光特性，并通过整合分子印迹技术制备了室温磷光（RTP）-比率荧光（RF）磁性介孔分子印迹聚合物（PFMM-MIPs）。RTP 用于检测孔雀石绿（MG）。荧光模式下的 420nm 处的荧光和 590nm 处的峰分别用作响应参考信号，以检测柠檬黄（TZ）。MG 的线性响应范围和检测限分别为 0.01-150μM 和 4.3nM，而 TZ 的线性响应范围和检测限分别为 0.05-80μM 和 23.7nM。RTP 可以避免背景荧光的干扰，而具有自校准能力的 RF 都可以在很大程度上削弱基质效应。这项工作使单探针型 MIP 能够通过 RTP 和 RF 实现双目标分析。该方法具有出色的灵敏度、特异性、回收率和可重复性，有望在食品、环境和生物分析领域得到应用。
