Novel polycyclic “turn-on” and “turn-off” pyrazoline and pyrazole fluorescent sensors for selective real-world monitoring of Fe3+/Fe2+ in aqueous environments

Seven novel polycyclic pyrazoline and pyrazole sensors were synthesised and screened for useful photophysical properties with pyrazoline 2 and pyrazole 7, displaying an Fe3+ “turn-off” response in aqueous environments with Fe3+ limits of detection (LoD) of 2.12 μM and 3.41 μM, respectively. Both 2 a...

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Bibliographic Details
Published in:RSC advances 2024-10, Vol.14 (47), p.34918-34924
Main Author: Ciupa, Alexander
Format: Article
Language:English
Subjects:
Aqueous environments
Chemistry
Drinking water
Environmental protection
Fluorescence
Pyrazole
Sensors
Water sampling
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Summary:Seven novel polycyclic pyrazoline and pyrazole sensors were synthesised and screened for useful photophysical properties with pyrazoline 2 and pyrazole 7, displaying an Fe3+ “turn-off” response in aqueous environments with Fe3+ limits of detection (LoD) of 2.12 μM and 3.41 μM, respectively. Both 2 and 7 sensors functioned in aqueous environments with real-world examples of Fe3+ detection in tap water and mineral water samples. 2 and 7 are suitable for the detection of Fe3+ at concentrations below the maximum iron limits for drinking water set by the Environmental Protection Agency (EPA) and European Union (EU).
ISSN:2046-2069
2046-2069
DOI:10.1039/d4ra06457g