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A novel 2D metal–organic framework probe: a highly sensitive and visual fluorescent sensor for Al3+, Cr3+ and Fe3+ ions.
- Source :
-
New Journal of Chemistry . 10/21/2022, Vol. 46 Issue 39, p18911-18916. 6p. - Publication Year :
- 2022
-
Abstract
- The development of metal–organic framework (MOF)-based fluorescent sensors in the detection of metal ions has attracted significant interest. In this study, a novel 2D MOF Tb-DBA was constructed using Tb3+ and 2′-amino-1,1′:4,1′′-terphenyl-4,4′′-dicarboxylic acid (H2DBA) by a solvothermal method. Tb-DBA could detect Al3+, Cr3+ and Fe3+ ions rapidly, sensitively, selectively and reversibly. The detection limit is as low as the nM level. Tb-DBA displayed fluorescence enhancement in the presence of Al3+, Cr3+ and Fe3+ ions. Significantly, Al3+, Cr3+ and Fe3+ ions could be visually detected under UV light. Additionally, Tb-DBA could also act as an indicator for alkaline solutions when pH > 10. The detection mechanism was studied by ICP, EDS and PXRD tests. These studies illustrated that cation exchange proceeded between Tb-DBA and Al3+, Cr3+ and Fe3+ ions, which inhibited the energy transfer from DBA to Tb3+ and enhanced the π*–π transitions of DBA. [ABSTRACT FROM AUTHOR]
- Subjects :
- *METAL-organic frameworks
*TERBIUM
*METAL detectors
*IONS
*METAL ions
*DETECTORS
Subjects
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 46
- Issue :
- 39
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 159579070
- Full Text :
- https://doi.org/10.1039/d2nj03911g