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Selective ion sensing in aqueous media with ESIPT active fluorescent probes – A particular case for hypochlorite detection.

Authors :
Murga Cotrina, Christian Julio
Bhattacharyya, Arghyadeep
Wang, Shenming
Amouroux, Baptiste
Casaretto, Nicolas
Bourcier, Sophie
Leray, Isabelle
Zucchi, Gaël
Source :
Dyes & Pigments. Oct2023, Vol. 218, pN.PAG-N.PAG. 1p.
Publication Year :
2023

Abstract

We report two ESIPT active novel fluorescent probes, 1 and 2 , based on benzoxazole and benzimidazole units, respectively. Their sensing aptitude towards metal ions in aqueous media is reported. A specific response of 1 to Al3+ and, to a lesser extent, Zn2+, was found, while the emission of 2 is highly impacted by the Al3+, Cu2+, Fe2+ and Fe3+ metal ions by either a blue shift or a quenching of the emission. Emission of 2 also shows a relative sensitivity to the Ni2+ and Hg2+ cations. Anions sensing studies on 2 revealed a unique emission in presence of hypochlorite ions, while glyphosate and aminomethylphosphonic acid have the effect to decrease the emission intensity by 40% and 75%, respectively. Investigations on the recognition mechanism led to the conclusion that Al3+ was inhibiting the ESIPT process by deprotonation of the phenol group, and that a fast but weak interaction was taking place between the hypochlorite ion and 2. [Display omitted] • Chemical sensors with optical detection through ESIPT mechanism selective to Aluminum and hypochlorite ions. • Unprecedented hypochlorite/oxime interaction. • Increased sensitivity to glyphosate and its main metabolite. • Detection of species dissolved in water. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
01437208
Volume :
218
Database :
Academic Search Index
Journal :
Dyes & Pigments
Publication Type :
Academic Journal
Accession number :
165040205
Full Text :
https://doi.org/10.1016/j.dyepig.2023.111524