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

Molecules

Xue-Meng Ji¹  Shi-Jie Li¹  Jin Wang¹  Jing-Min Liu¹  Lu Yang¹  Shuo Wang¹  Chi-Xuan Yao¹  Lu Dong¹  Huan Lv¹ 

[1] Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China;

关键词: ZIF-67;    heavy metal ions;    food-safety;    ratiometric fluorescence;   

DOI  :  10.3390/molecules27072356

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown