Dyes based on the azo-1H-pyrrole moiety – synthesis, spectroscopic and electrochemical properties, and adsorption on TiO2 / Anna Maruszewska in COLORATION TECHNOLOGY, Vol. 132, N° 1 (02/2016)  

[article]  inCOLORATION TECHNOLOGY > Vol. 132, N° 1 (02/2016) . - p. 92-97 Titre : Dyes based on the azo-1H-pyrrole moiety – synthesis, spectroscopic and electrochemical properties, and adsorption on TiO2 Type de document : texte imprimé Auteurs : Anna Maruszewska, Auteur ; Radoslaw Podsiadly, Auteur Année de publication : 2016 Article en page(s) : p. 92-97 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse électrochimique Analyse spectrale Caractérisation Colorants -- Adsorption Colorants -- Chimie Colorants -- Synthèse Colorants azoïques Dioxyde de titane Index. décimale : 667.3 Teinture et impression des tissus Résumé : A series of novel azo dyes based on the azo-1H-pyrrole moiety were synthesised. The dyes were characterised in terms of their spectroscopic, electrochemical, and physicochemical properties. In these dyes, the electron-rich 1H-pyrrole moiety was assembled as Ï€-bridges in donor–acceptor Ï€-conjugated dye, and aminophenylimine fragments and the carboxyl group were used as donor and anchoring acceptor groups respectively. The dyes had adequate HOMO and LUMO levels that matched the conduction band of TiO2 and the redox potential of the electrolyte. The adsorption of these azo compounds with carboxyl group(s) on TiO2 was investigated. Experimental data showed that the introduction of two carboxyl groups could greatly enhance the adsorption efficiency of the studied dyes on TiO2. The sorption kinetics was measured for selected dyes derived from 5-aminoisophthalic acid. Results indicate that a pseudo-second-order equation can better describe the adsorption kinetics of these dyes on TiO2. Note de contenu : - EXPERIMENTAL : General - Synthesis of azopyrrole-2-carbaldehydes - Synthesis of dye 4a - RESULTS AND DISCUSSION : Synthesis and spectroscopic studies - Electrochemical properties - Adsorption studies DOI : 10.1111/cote.12192 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12192/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25580 [article]

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Synthesis and ultraviolet-visible spectroscopic and electrochemical analyses of dyes derived from 2-aminobenzothiazole, and study of their adsorption on titanium dioxide / Anna Maruszewska in COLORATION TECHNOLOGY, Vol. 130, N° 4 (08/2014)  

[article]  inCOLORATION TECHNOLOGY > Vol. 130, N° 4 (08/2014) . - p. 243-249 Titre : Synthesis and ultraviolet-visible spectroscopic and electrochemical analyses of dyes derived from 2-aminobenzothiazole, and study of their adsorption on titanium dioxide Type de document : texte imprimé Auteurs : Anna Maruszewska, Auteur ; Radoslaw Podsiadly, Auteur Année de publication : 2014 Article en page(s) : p. 243-249 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aminobenzothiazoles Colorants -- Adsorption Dioxyde de titane Electrochimie Spectroscopie ultraviolette Index. décimale : 667.3 Teinture et impression des tissus Résumé : A series of Schiff bases with hydroxyl anchoring group/s in various positions were synthesised. Their visible light absorption and electrochemical and physicochemical adsorption properties were investigated. Results show that the studied compounds have adequate highest-occupied-molecular-orbital and lowest-unoccupied-molecular-orbital levels that match with the conduction band of titanium dioxide and the redox potential of the electrolyte. Adsorption of azomethine compounds with hydroxyl group/s on titanium dioxide was studied. Experimental data show that the introduction of two ?-hydroxyethyl groups can greatly enhance the adsorption efficiency of the studied Schiff base on titanium dioxide. Sorption kinetics was measured for di-(?-hydroxyethyl)aminobenzyliden-2-aminobenzothiazol. Results show rapid initial sorption (<30 min), followed by a slower rate of increasing uptake between 0.5 and 6 h. Kinetic data were modelled using pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetics equations. These results indicate that the pseudo-second-order equation and intraparticle diffusion model can better describe the adsorption kinetics of di-(?-hydroxyethyl)aminobenzyliden-2-aminobenzothiazol onto titanium dioxide. Note de contenu : - EXPERIMENTAL : General - Synthesis of Schiff bases derived from 2-aminobenzothiazole - Absorption on titanium dioxide - RESULTS AND DISCUSSION : Synthesis and spectroscopic studies - Electrochemical properties - Adsorptions studies DOI : 10.1111/cote.12198 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12098 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21775 [article]

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