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N-Sulphonatoalkyl indophenine derivatives: Design, synthesis and dyeing properties on wool, silk and nylon fabrics / Jinfang Cai in COLORATION TECHNOLOGY, Vol. 137, N° 2 (04/2021)
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Titre : N-Sulphonatoalkyl indophenine derivatives: Design, synthesis and dyeing properties on wool, silk and nylon fabrics Type de document : texte imprimé Auteurs : Jinfang Cai, Auteur ; Hua Jiang, Auteur ; Zhihua Cui, Auteur ; Weiguo Chen, Auteur Année de publication : 2021 Article en page(s) : p. 181-192 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption
Colorants -- Propriétés tinctoriales
Colorants -- Synthèse
Colorants acides
Fonctionnelles densitéLa théorie de la fonctionnelle de la densité (pour Density Functional Theory, sous-entendu électronique : DFT) constitue au début du XXIe siècle l'une des méthodes les plus utilisées dans les calculs quantiques de la structure électronique de la matière (atomes, molécules, solides) aussi bien en physique de la matière condensée qu'en chimie quantique. La DFT trouve ses origines dans le modèle développé par Llewellyn Thomas et Enrico Fermi à la fin des années 1920.
Laine
Polyamide 66
Résistance à l'humidité
Soie et constituants
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The importance of quinonoidal planarity in improving the wet fastness of acid dyes was studied in a new series of N-sulphonatoalkyl-substituted indophenine derivatives. These derivatives were synthesised via the sulphonatoalkylation reaction of isatins with alkanesultone or sodium bromoalkanesulphonate followed by the indophenine reaction. The effects of the position of sulphonic acid groups, length of the alkyl chain, and electron-donating/withdrawing groups on geometry, electronic structure, solubility, and absorption properties were systematically examined and correlated with the performances of the dyes on wool, silk and nylon fabrics. The N-sulphonatoalkyl indophenine dyes could exhibit a blue colour in N,N-dimethylformamide (DMF) and on silk or nylon fabric but a purplish colour in water and on wool fabric. Methoxy groups had a negative impact on the molar extinction coefficient and dye exhaustion, leading to relatively poor dyeing performance. In comparison, fluorine or chlorine atoms were less influential. The introduction of nitro groups could induce a yellowness to the dyed fabrics caused by the strengthened absorption at the region of 360 to 420 nm and reduce the dyeing rate and wet fastness level due to the low dye–fibre affinity. In general, the N-sulphonatoalkyl indophenine dyes exhibited satisfactory washing and rubbing fastness, especially on dyed nylon fabric. This study provides insight into the structure–property relationship of indophenine dyes and demonstrates that sulphonatoalkylation is an efficient methodology for designing high-performance textile dyestuffs based on quinonoidal heterocyclic structures. Note de contenu : - EXPERIMENTAL SECTION : Materials and instrumentation - Synthesis of compouns 2a-2g - Synthesis of D1 to D7 - General dyeing methods for wool, silk and nylon fabrics - Measurement for the dyeing properties
- RESULTS AND DISCUSSION : Synthesis of dyes D1èD7 - Density functional theory calculations - Absorption properties - Dyeing propertiesDOI : https://doi.org/10.1111/cote.12518 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12518 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36077
in COLORATION TECHNOLOGY > Vol. 137, N° 2 (04/2021) . - p. 181-192[article]Réservation
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