![](./images/home.jpg)
![](./images/bar_spacer.gif)
Détail de l'auteur
Auteur Andrew D. Towns |
Documents disponibles écrits par cet auteur
![](./images/expand_all.gif)
![](./images/collapse_all.gif)
![](./images/orderby_az.gif)
Coloration properties and clearability of phthalimide-derived monoazo disperse dyes containing ester groups / Jae-Hong Choi in COLORATION TECHNOLOGY, Vol. 129, N° 5 (10/2013)
![]()
[article]
Titre : Coloration properties and clearability of phthalimide-derived monoazo disperse dyes containing ester groups Type de document : texte imprimé Auteurs : Jae-Hong Choi, Auteur ; Jong-Yoon Choi, Auteur ; Eun-Mi Kim, Auteur ; Jae-Pil Kim, Auteur ; Andrew D. Towns, Auteur ; Chun Yoon, Auteur Année de publication : 2013 Article en page(s) : p. 352-359 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Absorption
Colorants azoïques
Colorimétrie
Paramètres de solubilité
PhtalimideLe phtalimide est un imide aromatique, c'est-à -dire un composé organique avec deux groupements carbonyle liés à un atome d'azote trigonal. C'est l'imide de l'acide benzène-1,2-dicarboxylique (acide phtalique).
Propriétés : Le phtalimide est un solide blanc cristallisé à température ambiante. Il est pratiquement insoluble dans l'eau froide, très peu soluble dans le benzène et l'éther de pétrole, et assez soluble dans l'éthanol chaud, l'acide éthanoïque et les bases concentrées.
Obtention : Le phtalimide est obtenu par réaction à chaud de l'anhydride phtalique avec l'ammoniac en solution aqueuse.
Polyesters
Solidité de la couleur
Solubilité
Teinture -- Fibres textiles synthétiquesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The coloration properties and clearability of disperse dyes prepared from phthalimide-derived diazo components and a coupling component containing two carboxylic acid ester groups have been investigated. Members of the series featured C2–C4 alkyl substituents on their phthalimidyl nitrogen atom. The nature of the N-alkyl group made no consistent difference to dye uptake on polyester. No correlation was found between percentage exhaustion and calculated solubility parameters. Wash fastness was extremely good. Comparison with analogues indicated that the diester motif was of significant extra benefit to wash fastness for phthalimide-derived dyes, but did not increase photostability above the lower range of commercial acceptability. Clearability was compared with that of dyes lacking one or both hydrolysable structural features, as well as with that of some industrial dyes. The novel dyes exhibited a greater tendency to be solubilised, consistent with hydrolysis of their ester and/or phthalimide functionalities. Note de contenu : - EXPERIMENTAL : Materials - Milling of dyes - Dyeing and reduction clearing procedure - Colorimetric measurements - Destination of dye exhaustion yields - Colour fastness testing - Testing the effect of simulated reduction clearing on dyes
- RESULTS AND DISCUSSION : Dye uptake - Calculations of the solubility parameter - Colour properties of the dyes on polyester - Colour fastness - Assessment of clearabilityDOI : 10.1111/cote.12037 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12037/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19353
in COLORATION TECHNOLOGY > Vol. 129, N° 5 (10/2013) . - p. 352-359[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 15533 - Périodique Bibliothèque principale Documentaires Disponible Industrial organic photochromic dyes / S. Nigel Corns in COLORATION TECHNOLOGY, Vol. 125, N° 5 (2009)
![]()
[article]
Titre : Industrial organic photochromic dyes Type de document : texte imprimé Auteurs : S. Nigel Corns, Auteur ; Steven M. Partington, Auteur ; Andrew D. Towns, Auteur Année de publication : 2009 Article en page(s) : p. 249-261 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : Organic photochromic molecules are well established as colorants in the manufacture of niche products, providing striking colour change effects when irradiated with light. This paper describes the industrially important classes of photochromic dye in terms of their development and chemistries, the applications in which their photochromism is employed commercially, and the technical features behind their success. Photochromic systems form the subject of much industrially funded research into nascent high-tech applications that have the potential to become the most commercially significant outlets for photochromic dyes. Those types being scrutinised are therefore also discussed along with the directions in which the industrial use of photochromic colorants may take. DOI : 10.1111/j.1478-4408.2009.00204.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2009.00204.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6860
in COLORATION TECHNOLOGY > Vol. 125, N° 5 (2009) . - p. 249-261[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 011765 - Périodique Bibliothèque principale Documentaires Disponible Molecular electronic spectroscopy : from often neglected fundamental principles to limitations of state-of-the-art computational methods / Heinz Mustroph in COLORATION TECHNOLOGY, Vol. 131, N° 1 (02/2015)
![]()
[article]
Titre : Molecular electronic spectroscopy : from often neglected fundamental principles to limitations of state-of-the-art computational methods Type de document : texte imprimé Auteurs : Heinz Mustroph, Auteur ; Steffen Ernst, Auteur ; Bianca Senns, Auteur ; Andrew D. Towns, Auteur Année de publication : 2015 Article en page(s) : p. 9-26 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Calcul
Colorants
Logiciels
Spectroscopie moléculaireIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The creation of the first synthetic dyes not only stimulated the hunt for new colorants but also drove the search for rules correlating the constitution of organic compounds with their colour. Dye chemistry additionally facilitated the development of molecular electronic spectroscopy as well as theories of molecular electronic structure and electronic transitions. Powerful quantum chemical computational tools are now available for the prediction of the electronic structure and spectroscopic characteristics of organic compounds. Such methods are thus useful in designing new functional colorants and aiding interpretation of their properties. However, without a deep appreciation of the principles and assumptions behind the calculations, one runs the risk of misunderstanding what can be achieved as well as becoming confused about how the outputted electronic and vibronic transition data correspond to observed absorption spectra. This review therefore aims to cover fundamentals of electronic spectroscopy that are often overlooked and enable the dye chemist using modern computational methods to comprehend the subtle differences in the types of transition energy value that such software can generate. In addition, the limitations of these methods in predicting absorption maxima and intensities of real-world colorants will be discussed in the context of physical influences on absorption band position and shape, for example from the perspective of different forms of the Franck–Condon principle. In essence, the goal of this review is to clarify, in terms that practical dye chemists will understand, what computational methods can predict and how valid these predictions are compared with reality. Note de contenu : - MOLECULAR ELECTRONIC SPECTROSCOPY : Electronic transition energy in atoms and molecules - some fundamentals - Calculation of electronic transition energies in molecules - Sources of disparity between calculated transition energies and experimental data - Intensity of electronic transitions in molecules - Absorption band shapes - the Franck-Condon principle DOI : 10.1111/cote.12120 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12120 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22968
in COLORATION TECHNOLOGY > Vol. 131, N° 1 (02/2015) . - p. 9-26[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 16810 - Périodique Bibliothèque principale Documentaires Disponible Novel azo dyes derived from phthalimide. Part 1 : Synthesis and spectroscopic properties / Jae-Hong Choi in COLORATION TECHNOLOGY, Vol. 124, N° 2 (2008)
![]()
[article]
Titre : Novel azo dyes derived from phthalimide. Part 1 : Synthesis and spectroscopic properties Type de document : texte imprimé Auteurs : Jae-Hong Choi, Auteur ; Chun Yoon, Auteur ; Andrew D. Towns, Auteur ; Mi-Hyeon Kim, Auteur ; Jeong-Min Jeon, Auteur Année de publication : 2009 Article en page(s) : p. 92-99 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : A series of azo dyes has been synthesised based on N-alkylphthalimide diazo components featuring one of three different alkyl groups. An analogous set of dyes was prepared in which the N-alkylphthalimidylazo systems bore an o,o-dibromo-substitution pattern. In these cases, cyanodebromination was performed to give the corresponding dicyano analogues. All the synthesised intermediates and dyes were characterised by mass spectrometry, proton nuclear magnetic resonance spectroscopy and elemental analysis. The absorption maxima of the dyes in dimethylformamide (N,N-dimethyl ~) were observed to be in the range 435–608 nm and found to be consistent with results seen in previous studies of conventional monoazo disperse dyes. Replacement of both halogens in the dibromo-substituted dyes with cyano groups led to large bathochromic shifts (128–141 nm) in absorption maxima. Bathochromism was also observed when acetylamino groups were present on the coupler ring ortho to the azo link. However, variation of the N-alkyl function on the imido ring from n-butyl to sec-butyl and iso-propyl had little effect on absorption maxima, values being similar to that reported for the parent N-unsubstituted analogue. DOI : 10.1111/j.1478-4408.2008.00127.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2008.00127.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3148
in COLORATION TECHNOLOGY > Vol. 124, N° 2 (2008) . - p. 92-99[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 010962 - Périodique Bibliothèque principale Documentaires Disponible Novel azo dyes derived from phthalimide. Part 2 / Jae-Hong Choi in COLORATION TECHNOLOGY, Vol. 124, N° 6 (2008)
![]()
[article]
Titre : Novel azo dyes derived from phthalimide. Part 2 : Dyeing properties and colour fastness on polyester fibres Type de document : texte imprimé Auteurs : Jae-Hong Choi, Auteur ; Jong-yun Choi, Auteur ; Hyun-young Lee, Auteur ; Andrew D. Towns, Auteur ; Chun Yoon, Auteur Année de publication : 2009 Article en page(s) : p. 364-369 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : The coloration and fastness properties of 18 carbocyclic monoazo disperse dyes bearing a phthalimide ring fused to the aromatic ring of their diazo components have been investigated. In each case, the phthalimidyl nitrogen atom was substituted with either a butyl, sec-butyl or isopropyl group, while the adjoined phenyl ring bore a substitution pattern typical of commercial colorants. Dye uptake and build-up onto both conventional and microfibre polyester through exhaustion dyeing were examined: while the expected tendency of greater exhaustion on microfibre was noted, there were few clear trends with respect to dye structure. The nature of the N-alkyl group made no consistent difference to dye uptake. Attempts to explain the observed percentage exhaustion values by mapping them to calculated partition coefficient or solubility parameter values were unsuccessful. Wash fastness tended to be best for blue dicyano-substituted derivatives, which may be as a result in part of these substituents promoting hydrolysis of the adjacent phthalimide ring to give more soluble phthalate species. In contrast, the dicyano dyes had relatively poor photostability compared with their unsubstituted analogues. DOI : 10.1111/j.1478-4408.2008.00164.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2008.00164.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3245
in COLORATION TECHNOLOGY > Vol. 124, N° 6 (2008) . - p. 364-369[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 010992 - Périodique Bibliothèque principale Documentaires Disponible A review of developments in industrial hair colorant actives for oxidative dyes / Andrew D. Towns in COLORATION TECHNOLOGY, Vol. 137, N° 4 (12/07/2021)
![]()
PermalinkSynthesis and spectroscopic properties of novel azo dyes derived from phthalimide / Jae-Hong Choi in COLORATION TECHNOLOGY, Vol. 123, N° 6 (2007)
![]()
PermalinkSynthesis and spectroscopic properties of novel phthalimide-derived monoazo disperse dyes containing ester groups / Jae-Hong Choi in COLORATION TECHNOLOGY, Vol. 126, N° 4 (2010)
![]()
Permalink