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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]
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 fluorescentesIndex. 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+) detectionDOI : https://doi.org/10.1111/cote.12687 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12687 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40388
in COLORATION TECHNOLOGY > Vol. 140, N° 1 (02/2024) . - p. 30-41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24413 - Périodique Bibliothèque principale Documentaires Disponible Polyurethaneurea aqueous dispersions prepared with diethyltoluenediamine as chain extender / Lin Jiang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
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Titre : Polyurethaneurea aqueous dispersions prepared with diethyltoluenediamine as chain extender Type de document : texte imprimé Auteurs : Lin Jiang, Auteur ; Yong Lin Chen, Auteur ; Chun Pu Hu, Auteur Année de publication : 2007 Article en page(s) : p. 59-66 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère uréthane-urée
Couches minces -- Propriétés mécaniques
Diéthyl toluène diamine
Dispersions et suspensions
Résistance à l'humidité:Résistance à l'eauIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of polyurethaneurea (PUU) aqueous dispersions either with diethyltoluenediamine (DETDA) or ethylenediamine (EDA) as chain extender were prepared with polyester polyol, isophorone diisocyanate and dimethylol propionic acid (DMPA), and characterized. It was found that the physical properties of the PUU aqueous dispersions prepared with DETDA were similar to or better than those prepared with EDA. Compared with the EDA-extended waterborne PUU films, the water resistance and the mechanical properties of the DETDA-extended waterborne PUU films were enhanced appreciably; these enhancements are attributed to the strong hydrogen bonding in urea carbonyl groups and the ordered structure of hard segments in the systems. The DETDA-extended PUU film with 40 wt.% of hard segment and 4.0 wt.% of DMPA unit showed the lowest water-absorbing amount (2.6 wt.%) over all PUU films studied. The hydrophobic surface of the DETDA-extended PUU film modified with a small amount of aminoethylaminopropyl polydimethylsiloxane (AEAPS) was observed and its hydrophobicity was enhanced by increasing the AEAPS content further. DOI : 10.1007/s11998-007-9010-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9010-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3671
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Code-barres Cote Support Localisation Section Disponibilité 007149 - Périodique Bibliothèque principale Documentaires Disponible 008267 - Périodique Bibliothèque principale Documentaires Disponible