A cyanine-based dual-modal probe for fluorimetric detection of mercury ion and colorimetric sensing of pH / Yanjie Li in COLORATION TECHNOLOGY, Vol. 138, N° 4 (08/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 4 (08/2022) . - p. 427-439 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 Cyanines Les 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 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23520	-	Périodique	Bibliothèque principale	Documentaires	Disponible

A novel near-infrared fluorescent and colorimetric probe for selective detection of Ag+ and Hg2+ / Yuquan Min in COLORATION TECHNOLOGY, Vol. 140, N° 1 (02/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 1 (02/2024) . - p. 30-41 Titre : A novel near-infrared fluorescent and colorimetric probe for selective detection of Ag+ and Hg2+ Type de document : texte imprimé Auteurs : Yuquan Min, Auteur ; Xin Han, Auteur ; Youguo Qi, Auteur ; Lin Jiang, Auteur ; Yanxi Song, Auteur ; Yilin Ma, Auteur ; Hongqi Li, Auteur Année de publication : 2024 Article en page(s) : p. 30-41 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Ions argent Ions mercure Ions métalliques Sondes fluorescentes Index. décimale : 667.3 Teinture et impression des tissus Résumé : It is particularly important to develop effective and specific detection methods for harmful metal ions such as the silver ion (Ag+) and mercury ion (Hg2+). In this article, a new near-infrared (NIR) fluorescent probe (N-FP) based on intramolecular charge transfer (ICT) effect was designed and synthesised, which exhibited the characteristics of large Stokes shift (163 nm) and excellent stability. Addition of Ag+ or Hg2+ to the N-FP solution in ethanol/water (9:1, v/v) caused remarkable enhancement of fluorescence emission at 661 nm, bathochromic shift of ultraviolet-visible absorption wavelength, and colour change from orange to red or purple. While adding other metal ions including Li+, Na+, K+, Ag+, Cu2+, Fe2+, Zn2+, Co2+, Ni2+, Mn2+, Sr2+, Ca2+, Mg2+, Al3+, Cr3+ and Fe3+ did not bring about substantial spectral and colour change. The detection limit of the N-FP for Ag+ and Hg2+ was calculated to be 1.1 and 0.72 μM, respectively. The N-FP could be used to recognise Ag+ and Hg2+ in a wide pH range of 1–10. The sensing mechanism was proposed and demonstrated by proton nuclear magnetic resonance (1H-NMR), high-performance liquid chromatography (HPLC) and mass spectrometry (MS) measurements. Note de contenu : - EXPERIMENTAL : Materials and equipment - Synthesis of compound N-OH - Synthesis of the N-FP - Measurement of absorption and fluorescence spectra - RESULTS AND DISCUSSION : 3.1 Synthesis and structural characterisation of the N-FP - Fluorescence emission spectra of the N-FP in different solvents - Selectivity of the N-FP for detection of Ag+ and Hg2+ - Anti-interference test on the N-FP for detection of Ag+ and Hg2+ - Study on Ag+ and Hg2+ detection limits by the N-FP - Study on the response time of the N-FP to Ag+ and Hg2+ - Effect of pH on stability and applicability of the N-FP - Comparison of sensing performance of the N-FP with other Hg2+/Ag+ sensors - Study on the detection mechanism of the N-FP - Table 1 : Comparison of performance of different fluorescent probes for mercury ion/silver ion (Hg2+/Ag+) detection DOI : https://doi.org/10.1111/cote.12687 En ligne : https://drive.google.com/file/d/1jEYF6WkyNLXuFJ3F75h1gC7miTeN7grd/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40388 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
24413	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)