Journal
ANALYTICA CHIMICA ACTA
Volume 1187, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.aca.2021.339168
Keywords
1,2,4]triazolo[1,5-a]pyrimidine; Fluorescence probe; Fe3+ detection; Cellular imaging
Categories
Funding
- Natural Science Foundation of Shandong Province [ZR2020MB104]
- Open Fund of Fujian Provincial Key Laboratory of Eco-Industrial Green Technology [WYKF2020-3]
- Educational Research Project of Young and Middle-aged Teachers in Fujian Province [JAT190772]
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A novel fluorescence probe for Fe3+ with specific selectivity, rapid response, low detection limit, and the capability to identify and detect Fe3+ in the presence of strong chelating agents has been synthesized. The probe shows great potential as a bioimaging reagent and can be used to rapidly identify Fe3+ with an Id-based test paper.
The detection of metal ions is of particular importance for monitoring environmental pollution and life metabolic activities. However, it is still a challenge to achieve Fe3+ detection with specific sensitivity and rapid response, especially in the presence of chelating agents for Fe3+ ions. Herein, a novel fluorescence probe for Fe3+, i.e., amide derivative of [1,2,4]triazolo[1,5-a] pyrimidine (TP, Id), was synthesized, featuring specific Fe3+ selectivity, rapid quenching (5 s), low limit of detection (0.82 mu M), good permeability and low cytotoxicity. More importantly, Id can be used to identify and detect Fe3+ in the presence of existing strong chelating agents (e.g., EDTA) for Fe3+ ions. The results show that the as-synthesized fluorescence probe is particularly suitable as a bioimaging reagent to monitor intracellular Fe3+ in living HeLa cells. Furthermore, we proposed the binding mode for Id with Fe3+ ions and the lighte-mitting mechanism through high-resolution mass spectra and density function theory calculations, respectively. An Id-based test paper can be used to rapidly identify Fe3+. These results are expected to improve the development of new sensitive and specific fluorescent sensors for Fe3+. (C) 2021 Published by Elsevier B.V.
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