Tautomerism, crystal structure, and copper(ii) complexation of pyridonylazo dyes derived from methyl 4-aminobenzoate / Ya-Nan Feng in COLORATION TECHNOLOGY, Vol. 133, N° 4 (08/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 4 (08/2017) . - p. 312-319 Titre : Tautomerism, crystal structure, and copper(ii) complexation of pyridonylazo dyes derived from methyl 4-aminobenzoate Type de document : texte imprimé Auteurs : Ya-Nan Feng, Auteur ; Yue-Hua Wang, Auteur ; Yun-Hong Liu, Auteur ; Hui-Fen Qian, Auteur ; Wei Huang, Auteur Année de publication : 2017 Article en page(s) : p. 312-319 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Synthèse Composés hétérocycliques -- Synthèse Index. décimale : 667.3 Teinture et impression des tissus Résumé : Four heterocyclic dyes, derived from methyl 4-aminobenzoate and pyridine-2,4-dione components, with different N-substituents in the latter [CH3, CH2CH3, CH2CH2OH, CH2CH2CH2OCH(CH3)2], were synthesised by the traditional diazotisation-coupling strategy. Furthermore, a Cu(ii) dye–metal complex was prepared and characterised by X-ray single-crystal diffraction for comparison, where the configuration transformation from hydrazone to deprotonated azo forms was found before and after Cu(ii) ion complexation. In addition, the azo–hydrazone transformation could be observed by acid–base titration experiments. To the best of our knowledge, this work is the first structural study of pyridone dyes based on methyl 4-aminobenzoate and the corresponding dye–metal complex. Note de contenu : - EXPERIMENT : Materials - Instrumentations - Syntheses of dyes 1-4 - Synthesis of the mononuclear copper(II) complex 5 [Cu(La)2(DMF)2] - X-ray data collection and solution - RESULTS AND DISCUSSION : Syntheses and spectral characterisation - Structural description of dyes 2 to 4 - Structural description of the the 1:2 neutral dye-metal complex 5 DOI : 10.1111/cote.12282 En ligne : https://drive.google.com/file/d/1ORbYeMjZ6l3IOoi8SLWisebwkckZM_1M/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28884 [article]

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