Integration of Metal-Organic Frameworks with Bi-Nanoprobes as Dual-Emissive Ratiometric Sensors for Fast and Highly Sensitive Determination of Food Hazards

• Main Authors: Dong, L. (Author), Ji, X.-M (Author), Li, S.-J (Author), Liu, J.-M (Author), Lv, H. (Author), Wang, J. (Author), Wang, S. (Author), Yang, L. (Author), Yao, C.-X (Author)
• Format: Article
• Language: English
• Published: NLM (Medline) 2022
• Subjects: carbon; Carbon; fluorescent dye; Fluorescent Dyes; food-safety; heavy metal ions; ion; Ions; limit of detection; Limit of Detection; metal organic framework; Metal-Organic Frameworks; quantum dot; Quantum Dots; ratiometric fluorescence; ZIF-67
• Online Access: View Fulltext in Publisher
• ISBN: 14203049 (ISSN)
• 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 Cu2+ and Pb2+ 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.