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]

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