Li Yanping, Yuan Jiangpei, Fang Yu
College of Information Science and Engineering, Changsha Normal University, Changsha 410100, Hunan, China.
College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China.
Inorg Chem. 2022 Feb 21;61(7):3103-3110. doi: 10.1021/acs.inorgchem.1c03339. Epub 2022 Feb 8.
HO detection is closely relevant to human health; however, most of the HO probes suffer from low accuracy and sensitivity because of the aggregating nature of solid sensors. In contrast, a mixed-matrix membrane (MMM) with high processability and flexibility is a suitable HO probe to overcome these drawbacks. Herein, we fabricated MOF-based MMMs by using a robust UiO-66-(COOH) with carboxylate-chelating moieties, which were utilized for binding Fe (II) metal centers. The Fe (II)-immobilized MOF-MMM involved in a Fenton reaction when treated with HO, exhibiting a fluorescence turn-on property. Compared to the bulk-state MOF powder, the MOF-MMM sensor showed much-improved sensitivity (detection limit down to 0.0215 μM) because of the uniform dispersion of the probe and a sufficient contact with the analyte. This MOF-MMM sensor combinedly exhibited a turn-on fluorescence response and outstanding sensing properties with flexibility and processability, providing a novel platform suitable for practical sensing applications.
