1. Amino-functionalized Al-MOF modulated TpTt-COF with dual-emission for fluorescent and optosmart detecting tetracycline in food samples.
- Author
-
Li, Chunhua, Xu, Xiao, Ji, Yixin, Wang, Fuli, Shi, Yubo, Zhao, Xin, Liu, Jue, Yang, Ying, and Zhao, Zhilei
- Subjects
- *
TETRACYCLINE , *TETRACYCLINES , *FLUORESCENCE quenching , *FOOD chemistry , *DETECTION limit - Abstract
[Display omitted] • NH 2 -MIL-53(Al) as modulator enhances fluorescence dual-emission of TpTt-COF. • Benzene ring of the probe recognizes tetracycline through π-π interactions. • Fluorescence quenching via N/O of the probe and −OH/−NH 2 of tetracycline. • Limit of detection of 0.014 μmol/L and recoveries of 94.39–105.67% are achieved. • The optosmart sensing system is applied to visual detection of tetracycline. Tetracycline residues in animal-derived food pose serious harm to human health, making it demanded to develop simple and sensitive method for detecting tetracycline. Herein, a dual-emission synchronous response fluorescence probe is reported based on amino-functionalized Al-MOF modulated TpTt-COF (donate as NMT). NMT exhibits excellent dual-emission at 455 and 575 nm under single excitation. Tetracycline is sensitively detected through quenching the dual-emission of NMT. NMT specifically recognizes tetracycline through intermolecular hydrogen bonding between –OH/−NH 2 of tetracycline and deprotonated O−/−NH−/C N of NMT. A calibration curve is built between the fluorescence ratio and the tetracycline concentration with a detection limit of 0.014 μmol/L. NMT is employed to detect tetracycline in milk, pork and chicken, and displays satisfactory recoveries of 94.39–105.67%, respectively. The optosmart sensor based on NMT and smartphone has been constructed for visually detecting tetracycline. This method provides routes to construct MOF-COF fluorescence probes and has good prospects in food analysis. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF