Spectroscopic study of lactonic rhodamine B immobilised on polytetrafluoroethylene porous film / Shohei Yamaguchi in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)  

[article]  inCOLORATION TECHNOLOGY > Vol. 139, N° 4 (08/2023) . - p. 464-474 Titre : Spectroscopic study of lactonic rhodamine B immobilised on polytetrafluoroethylene porous film Type de document : texte imprimé Auteurs : Shohei Yamaguchi, Auteur ; Iori Umeki, Auteur ; Megumi Nagashima, Auteur ; Daisuke Yamamoto, Auteur ; Terumitsu Ishii, Auteur ; Akira Hashimoto, Auteur ; Kazunori Matsui, Auteur Année de publication : 2023 Article en page(s) : p. 464-474 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale Films plastiques Lactones Matériaux poreux Polytétrafluoréthylène Rhodamine Stabilité chimique Teinture Index. décimale : 667.3 Teinture et impression des tissus Résumé : Rhodamine B (RB) is frequently used in chemical sensors, where the sensing principle depends on its structural changes to lactone (L), zwitterion (Z), and cation (C) forms in response to the local environment. Compared to the Z- and C-forms, stabilising the L-form in matrices is difficult because of the required low environmental polarity. In this study, we report a simple and easy method to stabilise the L-form of RB on the surface of a polytetrafluoroethylene porous film (p-PTFE), in which the film is dipped in an ethanol solution containing RB and dried. This phenomenon was not observed on polyethylene film and cellulose filter paper in RB solutions. Furthermore, a chemical stability test for colourless RB/p-PTFE samples was conducted by exposing these samples to a humid environment. The test result indicated that, with an increase in the environmental humidity, the equilibrium shifted from the L-form to the Z-form of RB immobilised on the p-PTFE film. Note de contenu : - EXPERIMENTAL : Materials - Sample preparation - Chemical stability test - Instrumental analysis - RESULTS AND DISCUSSION : Dyeing of PTFE, PE and CFP - UV-Vis study of RB in solutions - UV-Vis study of RB-immobilised p-PTFE and PE films, and CFP - IR study of RB-immobilised p-PTFE and PE films, and CFP - Effect of humidity on the chemical stability of lactonic RB-immobilised p-PTFE films - Table 1 : Dyeing results of PTFE, PE and CFP samples dipped in RB solution - Table 2 : Characteristic IR absorption bands (cm−1) and vibration mode assignments based on.14 Rhodamine B base and Rhodamine powders are abbreviated as LRB and CRB, respectively DOI : https://doi.org/10.1111/cote.12659 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12659 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39683 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
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