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Removal of aromatic amines and decolourisation of azo dye baths by electrochemical treatment / VÃctor López-Grimau in COLORATION TECHNOLOGY, Vol. 129, N° 4 (08/2013)
[article]
Titre : Removal of aromatic amines and decolourisation of azo dye baths by electrochemical treatment Type de document : texte imprimé Auteurs : VÃctor López-Grimau, Auteur ; Miquel Riera-Torres, Auteur ; Montserrat López-Mesas, Auteur ; Carmen Gutiérrez-Bouzán, Auteur Année de publication : 2013 Article en page(s) : p. 267–273 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amines Une amine est un composé organique dérivé de l'ammoniac dont certains hydrogènes ont été remplacés par un groupement carboné. Si l'un des carbones liés à l'atome d'azote fait partie d'un groupement carbonyle, la molécule appartient à la famille des amides. Découvertes en 1849, par Wurtz les amines furent initialement appelées alcaloïdes artificiels.
On parle d'amine primaire, secondaire ou tertiaire selon que l'on a un, deux ou trois hydrogènes substitués.
Par exemple, la triméthylamine est une amine tertiaire, de formule N(CH3)3.
Typiquement, les amines sont obtenues par alkylation d'amines de rang inférieur. En alkylant l'ammoniac, on obtient des amines primaires, qui peuvent être alkylées en amines secondaires puis amines tertiaires. L'alkylation de ces dernières permet d'obtenir des sels d'ammonium quaternaire.
D'autre méthodes existent : 1. Les amines primaires peuvent être obtenues par réduction d'un groupement azoture, 2. Les amines peuvent aussi être obtenues par la réduction d'un amide, à l'aide d'un hydrure, 3. L'amination réductrice permet l'obtention d'amines substituées à partir de composés carbonylés (aldéhydes ou cétones), 4. Les amines primaires peuvent être obtenues par la réaction de Gabriel.
Bains de teinture -- Epuration
Colorants azoïques
Composés aromatiques
Décoloration
Eaux usées -- Décontamination
Eaux usées -- Epuration
Electrochimie
Extraction (chimie)Index. décimale : 667.3 Teinture et impression des tissus Résumé : The presence of aromatic amines in effluent from dyeing processes of the textile industry is an added problem to the high coloration typical of this type of effluent. The main objective of the present work was to eliminate these two problems simultaneously by electrochemical treatment using bath solutions containing three azo dyes. For the analysis of amines, a liquid–liquid extraction method was developed as an easier and faster alternative to the method described in the standards and widely used in analytical laboratories. Four amines (aniline, o-toluidine, 4-chloroaniline and 4-aminobiphenyl) were detected by GC-MS in the residual azo dye baths. A total amine concentration of between 2.5 and 1 ppm was detected, 4-aminobiphenyl being the main compound. Both residual colour and amines were removed by electrochemical treatment carried out at three current densities (3, 24 and 40 mA/cm2). At 24 mA/cm2, more than 90% of colour removal was achieved, and the total amine concentration was reduced to below 0.15 ppm. DOI : 10.1111/cote.12021 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12021/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19038
in COLORATION TECHNOLOGY > Vol. 129, N° 4 (08/2013) . - p. 267–273[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15394 - Périodique Bibliothèque principale Documentaires Disponible Solid solution azo pigments / N. Sekar in PAINTINDIA, Vol. LII, N° 2 (02/2002)
[article]
Titre : Solid solution azo pigments Type de document : texte imprimé Auteurs : N. Sekar, Auteur Année de publication : 2002 Article en page(s) : p. 48-50 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants azoïques
DistillationIndex. décimale : 667.2 Colorants et pigments Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12317
in PAINTINDIA > Vol. LII, N° 2 (02/2002) . - p. 48-50[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001278 - Périodique Bibliothèque principale Documentaires Disponible Solubilisation study of water-insoluble dye in cationic single/dimeric surfactant micelles : effect of headgroup, non-polar tail, and spacer chain in aqueous and salt solution / Shailesh Padasala in COLORATION TECHNOLOGY, Vol. 132, N° 3 (06/2016)
[article]
Titre : Solubilisation study of water-insoluble dye in cationic single/dimeric surfactant micelles : effect of headgroup, non-polar tail, and spacer chain in aqueous and salt solution Type de document : texte imprimé Auteurs : Shailesh Padasala, Auteur ; Ketan Kuperkar, Auteur ; Pratap Bahadur, Auteur Année de publication : 2016 Article en page(s) : p. 208-216 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Solubilité
Colorants azoïques
Concentration micellaire critique
Hydrophobie
Solutions aqueuses (chimie)
SurfactantsIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The solubilisation of hydrophobic azo dye Orange OT in aqueous/salt solution in several cationic surfactant micelles was studied using UV-vis spectroscopy. An attempt was made to correlate dye solubilising strength with adsorption/micellar characteristics. In our experiments we determined the change in solubilisation of hydrophobic dye when added to an aqueous solution of oppositely charged quaternary-salt-based cationic surfactants (conventional and gemini) and remarked on the probable location of the solubilised dye in the surfactant micelle. Results highlight the onset of dye solubilisation around the critical micelle concentration of each surfactant, which is influenced by the non-polar tail, spacer, and polar headgroup, while no dye could be solubilised at concentrations below the critical micelle concentration. Orange OT solubilised almost linearly with increase in surfactant concentration at and above the critical micelle concentration. The change in colour intensity of the dye (darker below the critical micelle concentration, lighter at and above the critical micelle concentration) could be attributed to dye–surfactant interactions. Further dye solubilisation was observed in the presence of salt. Note de contenu : - EXPERIMENTAL : Materials - Instrumentation - Method
- RESULTS AND DISCUSSION : Effect of tail chain length and headgroup - Effect of salt - Effect of spacer chain length - Location of the solubilised dye in surfactant micelleDOI : 10.1111/cote.12208 En ligne : https://drive.google.com/file/d/19vsxn9TzSiIuqm_V9bIt_guHNHUfhyff/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26353
in COLORATION TECHNOLOGY > Vol. 132, N° 3 (06/2016) . - p. 208-216[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18101 - Périodique Bibliothèque principale Documentaires Disponible Solvatochromism and quantum mechanical investigation of disazo pyridone dye / Dusan Mijin in COLORATION TECHNOLOGY, Vol. 134, N° 6 (12/2018)
[article]
Titre : Solvatochromism and quantum mechanical investigation of disazo pyridone dye Type de document : texte imprimé Auteurs : Dusan Mijin, Auteur ; Bojan D. Bozic, Auteur ; Jelena Ladarevic, Auteur ; Luka Matovic, Auteur ; Gordana S. Uscumlic, Auteur ; Vesna D. Vitnik, Auteur ; Zeljko Vitnik, Auteur Année de publication : 2018 Article en page(s) : p. 478-490 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Analyse
Colorants azoïques
Solvatochromisme
Théorie quantiqueIndex. décimale : 667.2 Colorants et pigments Résumé : Disazo pyridone dye, 4‐methyl‐2,6‐dioxo‐5‐(2‐(4‐(phenyldiazenyl)phenyl)hydrazono)‐1,2,5,6‐tetrahydropyridine‐3‐carbonitrile, is synthesised and thoroughly characterised by a combination of experimental and computational approaches. Fourier Transform‐infrared and nuclear magnetic resonance (NMR) spectra prove the existence of the hydrazone form in the solid state and in dimethyl sulphoxide, which is also supported by vibrational and NMR theoretical studies. Ultraviolet (UV) spectral properties, as well as solvatochromism in 19 solvents of different polarity, are investigated. In most of the solvents, the dye is solely present in the hydrazone form, whereas in certain solvents, an acid–base equilibrium exists. Excellent agreement between computational and experimental UV–visible data was established. Frontier Molecular Orbital analysis was performed and proved the existence of intramolecular charge transfer through the dye molecule. A molecular electrostatic potential surface was plotted over the optimised geometry to lighten the reactivity of the investigated molecule. Note de contenu : - EXPERIMENTAL : Materials and measurements - Synthesis - 4-methyl-2,6-dioxo-5-(2-(4-(phenyldiazenyl)phenyl)hydrazono)-1,2,5,6-tetrahydropyridine-3-carbonitrile - Method of calculation
- RESULTS AND DISCUSSION : The solvent effect on absorption spectra - Correlation with multiparameter solvent polarity scales - Molecular geometry- Vibrational analysis - NMR analysis - UV-Vis studies and electronic properties - Molecular electrostatic potentialDOI : 10.1111/cote.12369 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12369 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31382
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Code-barres Cote Support Localisation Section Disponibilité 20430 - Périodique Bibliothèque principale Documentaires Disponible Solvatochromism, halochromism, and azo–hydrazone tautomerism in novel V-shaped azo-azine colorants / Amol S. Choudhari in COLORATION TECHNOLOGY, Vol. 132, N° 5 (10/2016)
[article]
Titre : Solvatochromism, halochromism, and azo–hydrazone tautomerism in novel V-shaped azo-azine colorants Type de document : texte imprimé Auteurs : Amol S. Choudhari, Auteur ; Sharad R. Patil, Auteur ; Nagaiyan Sekar, Auteur Année de publication : 2016 Article en page(s) : p. 387-398 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Analyse
Colorants azoïques
Halochromisme
Solvatochromisme
Tautomères
TautomérieIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The azo–hydrazone tautomerism, solvatochromism, and halochromism in four novel V-shaped asymmetrical acceptor-?-donor-?-acceptor (A-?-D-?-A) compounds were examined. They contain 2,7,15,16-functionalised benzophenazine cores connected to the anchoring electron-deficient phenyl core via azo linkers and 2,7-position fused with anthraquinone. These compounds derived from 2-hydroxy-1,4-napthaquinone (lawsone) have been prepared in moderate to good yields. The synthesis involved the diazotisation of substituted aromatic amines, coupling onto 2-hydroxy-1,4-napthaquinone, and further condensing the resulting azo compounds with 1,2-diaminoanthraquinone in acetic acid. The absorption wavelengths of the dyes in different solvents were in the range 500–720 nm. The spectral changes of the synthesised azo-azine compounds in different pH indicated the formation of hydrazone tautomer in acidic pH and of azo tautomer in alkaline pH. Density functional theory was used to assess the tautomers in terms of geometry and position of the tautomeric equilibrium. Time-dependent density functional theory calculations allowed us to assign the electronic transitions (>90%) of the low-energy bands. Note de contenu : - EXPERIMENTAL : Materials and instrumentation - Synthesis strategy - Computational details - Synthesis and characterisation
- RESULTS AND DISCUSSION : Photophysical properties - Structural effects - Halochromism - Electrochemical properties - Thermal stability - Optimised geometries of dyes 15 and 18 - Electronic vertical excitation spectra (TDDFT)DOI : 10.1111/cote.12226 En ligne : https://drive.google.com/file/d/1YGoI2-lkk5G1Ew6QERMfvPbApGUckdyM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27227
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Code-barres Cote Support Localisation Section Disponibilité 18353 - Périodique Bibliothèque principale Documentaires Disponible Structural, spectroscopic and computational study of 5-(substituted phenylazo)-3-cyano-1-ethyl-6-hydroxy-4-methyl-2-pyridones / Jelena Mirkovic in COLORATION TECHNOLOGY, Vol. 134, N° 1 (02/2018)
PermalinkStructure and hydrophilicity of azo-dye-derived rotaxane : density functional theory approach / Hyerim Kim in COLORATION TECHNOLOGY, Vol. 133, N° 5 (10/2017)
PermalinkSynthesis and absorption properties of five new heterocyclic disazo dyes containing pyrazole and pyrazolone and their acute toxicities on the freshwater amphipod Gammarus roeseli / Aykut Demirçali in COLORATION TECHNOLOGY, Vol. 137, N° 3 (06/2021)
PermalinkSynthesis and application of some novel antimicrobial monoazonaphthalimide dyes : synthesis and characterisation / Hanieh Shaki in COLORATION TECHNOLOGY, Vol. 128, N° 4 (2012)
PermalinkSynthesis and evaluation of a novel blue cationic reactive dye for modified nylon 6.6 ‘Tactel Coloursafe’ / Soleimani-Gorgani Atasheh in COLORATION TECHNOLOGY, Vol. 127, N° 4 (2011)
PermalinkSynthesis, characterisation, and study of the photophysical properties of highly stable imidazole-based novel solid-state fluorescent azo colourants / Preetam N. Moolya in COLORATION TECHNOLOGY, Vol. 131, N° 2 (04/2015)
PermalinkSynthesis of branched azo dyes based on benzene sulphonamide intermediates and their spectral properties in COLORATION TECHNOLOGY, Vol. 128, N° 6 (2012)
PermalinkSynthesis of pharmacological dyes and their application on synthetic fabrics / Mounir A. I. Salem in COLORATION TECHNOLOGY, Vol. 131, N° 4 (08/2015)
PermalinkSynthesis of temporarily solubilised azo disperse dyes containing a ?-sulphatoethylsulphonyl group and dispersant-free dyeing of polyethylene terephthalate fabric / Jae-Pil Kim in COLORATION TECHNOLOGY, Vol. 132, N° 5 (10/2016)
PermalinkSynthesis of yellow pyridonylazo colorants and their application in dye-pigment hybrid colour filters for liquid crystal display / Jong Min Park in COLORATION TECHNOLOGY, Vol. 133, N° 2 (04/2017)
PermalinkSynthesis, spectral properties and dyeing on polyester of monoazo dyes from indol-2-one derivatives / Ru Jia in COLORATION TECHNOLOGY, Vol. 128, N° 4 (2012)
PermalinkTautomerism, crystal structure, and copper(II) complexation of isomeric pyridonylazo dyes derived from 2- and 4-aminobenzoic acids / Yue-Hua Wang in COLORATION TECHNOLOGY, Vol. 132, N° 6 (12/2016)
PermalinkThe application of the microwave irradiation to the synthesis of azo pigments / Krzysztof Wojciechowski in PAINTINDIA, Vol. LVII, N° 3 (03/2007)
PermalinkThe evaluation of printability and non-enzymatic NADH reduction of 4'-chlorophenylazo-2-naphthol for use as a printing pigment / M. Oktav in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B3 (09/2005)
PermalinkThe sonochemical decolorisation of textile azo dye CI Reactive Orange 127 / Celalettin Özdemir in COLORATION TECHNOLOGY, Vol. 127, N° 4 (2011)
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