[article]
| Titre : |
A cyanine-based dual-modal probe for fluorimetric detection of mercury ion and colorimetric sensing of pH |
| Type de document : |
texte imprimé |
| Auteurs : |
Yanjie Li, Auteur ; Youguo Qi, Auteur ; Zhenxiang Xu, Auteur ; Yanxi Song, Auteur ; Hongqi Li, Auteur ; Jian Zhang, Auteur ; Junjie Tang, Auteur ; Jun Zhou, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 427-439 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse spectrale
Colorimétrie
CyaninesLes cyanines sont le nom non systématique d'une famille de marqueurs synthétiques appartenant au groupe des polyméthines. Les cyanines ont de nombreuses utilisations comme marqueurs fluorescents, particulièrement en imagerie biomédicale. Selon la structure, elles couvrent un spectre allant de l'IR à l'UV.
Ions mercure
pH
Produits chimiques -- Détection
Sondes fluorescentes
|
| Index. décimale : |
535.6 Couleur |
| Résumé : |
A fluorescent probe derived from cyanine-rhodanine conjugate was developed for dual detection of mercury (Hg2+) ion and pH. Addition of Hg2+ ion to the weakly fluorescent probe solution in dimethyl sulphoxide/water (DMSO/H2O, 7:3, v/v) induced discernible colour change and fluorescence enhancement while other metal cations including Li+, Na+, K+, Ag+, Cu2+, Fe2+, Zn2+, Co2+, Ni2+, Mn2+, Sr2+, Ca2+, Mg2+, Al3+, Cr3+ and Fe3+ did not cause obvious change in colour and fluorescence emission. The detection limit of the probe toward Hg2+ ion is 1.61 × 10−7 M. The probe also exhibited remarkable pH-responsive effect. It acts as a dual chromogenic and spectroscopic probe for determining different pH scales over a wide range of pH 1.0–14.0: bright yellow with maximum wavelength (λmax) 416 nm for pH 1.0–2.0, orange with λmax 470 nm for pH 3.0–9.0, and pale yellow with λmax below 400 nm for pH 10.0–14.0. Plausible sensing mechanisms of the probe toward Hg2+ ion and pH have been proposed. |
| Note de contenu : |
- EXPERIMENTAL : Materials and instruments - Synthesis of probe CY - Measurements of absorption and fluorescence spectra
- RESULTS AND DISCUSSION : Preparation of probe CY - Sensing of mercury ions by probe CY - Sensing of pH by probe CY
- Table 1 : Performance comparison of fluorescent probes for the detection of mercury (Hg2+) ion
- Table 2 : Application of probe CY to determination of mercury (Hg2+) ion concentrations in different water samples |
| DOI : |
https://doi.org/10.1111/cote.12603 |
| En ligne : |
https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12603 |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37895 |
in COLORATION TECHNOLOGY > Vol. 138, N° 4 (08/2022) . - p. 427-439
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