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Two novel rhodamine-based fluorescent probes for the rapid and sensitive detection of Fe3+: Experimental and DFT calculations.
- Source :
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Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy . Apr2019, Vol. 213, p167-175. 9p. - Publication Year :
- 2019
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Abstract
- Abstract Fe3+ ions play an important role in both biological and environmental field. In this work, two novel rhodamine-based colorimetric and fluorescent probes (RBA2 and RBA3) were designed and synthesized for the efficient detection of Fe3+. Upon the addition of Fe3+, the fluorescence intensity of RBA2 and RBA3 enhanced 108-fold and 222-fold, respectively. RBA2 and RBA3 exhibited a low detection limit which could achieve 12.8 nM and 11.0 nM. In addition, the binding modes of RBA2 and RBA3 with Fe3+ were proved to be 1:1 stoichiometry in the complexes by Job's plot, ESI-MS and 1H NMR results. The complexing ability of RBA3 with Fe3+ excessed to that of RBA2 that was determined by the binding association constants, and highly consistent with DFT calculations results. Furthermore, RBA2 and RBA3 were further utilized to detect Fe3+ in living cells and real water samples, indicating their promising prospects in biological and environmental field. Graphical Abstract Unlabelled Image Highlights • Two novel rhodamine-based fluorescent probes for naked eye detection of Fe3+ were synthesized and characterized. • The binding modes of RBA2 and RBA3 with Fe3+ were proved to be 1:1 stoichiometry by Job's plot, ESI-MS and 1H NMR results. • The binding abilities of RBA2 and RBA3 with Fe3+ were investigated, consisting with DFT calculations. • These two probes can be used in three water samples and the living systems. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13861425
- Volume :
- 213
- Database :
- Academic Search Index
- Journal :
- Spectrochimica Acta Part A: Molecular & Biomolecular Spectroscopy
- Publication Type :
- Academic Journal
- Accession number :
- 134884423
- Full Text :
- https://doi.org/10.1016/j.saa.2019.01.032