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- Title
Encapsulation of Dual‐Emitting Fluorescent Magnetic Nanoprobe in Metal‐Organic Frameworks for Ultrasensitive Ratiometric Detection of Cu<sup>2+</sup>.
- Authors
Wang, Jing; Chen, Haiyong; Ru, Fan; Shan, Duoliang; Chen, Jing; Lu, Xiaoquan; Zhang, Zhen; Mao, Xiang
- Abstract
Abstract: An effective dual‐emission fluorescent metal‐organic framework (MOF)‐based nanoprobe has been established for ultrasensitive and rapid ratiometric detection of Cu2+. Such a nanoprobe was prepared by encapsulating fluorescein isothiocyanate (FITC), and Eu(III) complex‐functionalized Fe3O4 into the zeolitic imidazolate framework material (ZIF‐8). In this nanoprobe, FITC was used as a reference signal, thus improving the influence of external uncertainties. The Eu‐complex signal could be quenched after adding an amount of Cu2+. The ZIF‐8 could enrich the target analytes, which can amplify the fluorescence signal due to the good adsorption properties of the ZIF‐8. Based on above structural and compositional features, the detection limit of the nanoprobe is 0.1 n m for Cu2+, almost 2×104 times lower than the maximum allowable amount of Cu2+ in drinking water, which constructed a platform for effective detection of Cu2+. Using the nanoprobe to detect Cu2+ in aqueous solution is rapid and the probe still remained stable. Additionally, this sensor for the ratiometric fluorescence imaging of copper ions was also certified in real samples and live cells.
- Subjects
ENCAPSULATION (Catalysis); METAL-organic frameworks; OPTICAL properties of copper; NANO-probe sensors; FLUORESCENT lighting; STRUCTURAL frames
- Publication
Chemistry - A European Journal, 2018, Vol 24, Issue 14, p3499
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201704557