Sequential Fluorescence Recognition of Molybdenum(VI), Arsenite, and Phosphate Ions in a Ratiometric Manner: A Facile Approach for Discrimination of AsO
Journal
ACS omega
ISSN: 2470-1343
Titre abrégé: ACS Omega
Pays: United States
ID NLM: 101691658
Informations de publication
Date de publication:
30 Jun 2019
30 Jun 2019
Historique:
received:
09
02
2019
accepted:
15
05
2019
entrez:
29
8
2019
pubmed:
29
8
2019
medline:
29
8
2019
Statut:
epublish
Résumé
An amide-based smart probe (L) is explored for nanomolar detection of Mo(VI) ion in a ratiometric manner, involving hydrogen-bond-assisted chelation-enhanced fluorescence process through inhibition of photoinduced electron transfer process. The recognition of Mo(VI) is associated with a 17-fold fluorescence enhancement and confirmed by single-crystal X-ray diffraction of the resulting Mo(VI) complex (M1). Further, M1 selectively recognizes arsenite through green emission of their adduct (C1) with an 81-fold fluorescence enhancement. Interestingly, dihydrogen phosphate causes dissociation of C1 back to free L having weak fluorescence. The methods are fast, highly selective, and allow their bare eye visualization at physiological pH. All of the interactions have been substantiated by time-dependent density functional theory calculations to rationalize their spectroscopic properties. The corresponding lowest detection limits are 1.5 × 10
Identifiants
pubmed: 31460185
doi: 10.1021/acsomega.9b00377
pmc: PMC6648501
doi:
Types de publication
Journal Article
Langues
eng
Pagination
10877-10890Déclaration de conflit d'intérêts
The authors declare no competing financial interest.
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