Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China.
Molecules. 2022 Apr 6;27(7):2356. doi: 10.3390/molecules27072356.
Functional nanoprobes which detect specific food hazards quickly and simply are still in high demand in the field of food-safety inspection research. In the present work, a dual-emission metal-organic framework-based ratiometric fluorescence probe was integrated to detect Cu and Pb with rapidness and ease. Specifically, quantum dots (QDs) and carbon quantum dots (CQDs) were successfully embedded into zeolitic imidazolate framework-67 (ZIF-67) to function as a novel ratiometric fluorescent sensing composite. The ratiometric fluorescence signal of CQDs/QDs@ZIF-67 was significantly aligned with the concentration of metal ions to give an extremely low detection limit of 0.3324 nM. The highly sensitive and selective CQDs/QDs@ZIF-67 composite showed potential for the rapid and cost-effective detection of two metal ions.
在食品安全检测研究领域，快速、简单检测特定食物危害的功能性纳米探针仍有很高的需求。在本工作中，构建了一种基于双发射金属有机骨架的比率荧光探针，可快速、轻松地检测 Cu 和 Pb。具体来说，将量子点（QDs）和碳量子点（CQDs）成功嵌入沸石咪唑酯骨架-67（ZIF-67）中，作为一种新型比率荧光传感复合材料。CQDs/QDs@ZIF-67 的比率荧光信号与金属离子浓度显著一致，检测限低至 0.3324 nM。高灵敏度和选择性的 CQDs/QDs@ZIF-67 复合材料有望实现两种金属离子的快速、经济高效检测。
