[article]
| Titre : |
A new, highly potent 1,8-naphthalimide-based fluorescence turn-off chemosensor capable of detecting Cu(II) ions in real-world water samples |
| Type de document : |
texte imprimé |
| Auteurs : |
Chuang Li, Auteur ; Xintong Han, Auteur ; Shanshan Mao, Auteur ; Stephen Opeyemi Aderinto, Auteur ; Xinkui Shi, Auteur ; Kesheng Shen, Auteur ; Huilu Wu, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 230-239 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse quantitative (chimie)
Eaux usées -- Recyclage
Ions cuivre
Produits chimiques -- Détection
Récupération (Déchets, etc.)
|
| Index. décimale : |
667.3 Teinture et impression des tissus |
| Résumé : |
The synthesis of a new 1,8-naphthalimide-based fluorescence turn-off chemosensor for the effective detection of Cu(II) ions is reported. The chemosensor MAST was characterised by mp, Fourier Transform-infrared (FTIR), ultraviolet-visible (UV-vis), fluorescence, 1H-NMR and 13C-NMR spectroscopy, and mass spectrometry. After treatment with Cu(II) ions in coexistence with various competitive metal ions in a dimethylsulphoxide (DMSO)/4-2-hydroxyethyl)-1-piperazineethanesulphonic acid (HEPES) buffer solution (v/v, 1:1; pH 7.4), the chemosensor demonstrated high selectivity towards Cu(II) ions and a fluorescence quenching of 83.67% was observed. In addition, a good linear response for the chemosensor detecting Cu(II) ions was obtained over the concentration range 0.2–1 µm. The combined results of UV-vis and fluorescence titrations with the Job plot yielded a 1:1 stoichiometric interaction of the chemosensor with Cu(II) ions. The association constant and detection limit were calculated as 1.37 x 10-6 m-1 and 1.69 x 10-8 m, respectively. Based on results, the quenching response of MAST towards Cu(II) ions could be ascribed to the reverse-photoinduced electron transfer (PET) mechanism. Finally, the proposed chemosensor was applied to quantify Cu(II) ions in real-world water samples and excellent recovery rates of 98–105.8% were obtained. |
| Note de contenu : |
- EXPERIMENTAL : Reagents and materials - Instrumentation - Procedures for spectroscopic measurements - Procedures for spectroscopic measurements - Synthesis - Synthesis of intermediate compound 2, 3 and 4 - Synthesis of the proposed chemosensor, MAST
- RESULTS AND DISCUSSION : Synthesis and characterisation - Investigation of the photophysical properties of MAST - Investigation of the effect of pH on the sensing properties of MAST - UV-vis and fluorescence titration of MAST towards Cu(II) ions - Spectroscopic assessment of MAST in the presence of various metal ions - Selectivity study of MAST for Cu(II) ions over competitive metal ions - Determination of the soichiometric ratio and binding constant - Determination of the detection limit of MAST - Propsed sensing mechanism - response time - Real-worl application of MAST for Cu(II) quantification |
| DOI : |
10.1111/cote.12340 |
| En ligne : |
https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12340 |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30647 |
in COLORATION TECHNOLOGY > Vol. 134, N° 3 (06/2018) . - p. 230-239
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