Spectral characterisation and computational studies of some novel phenylazoindol-2-one dyes / Zeynel Seferoglu in COLORATION TECHNOLOGY, Vol. 125, N° 6 (2009)  

[article]  inCOLORATION TECHNOLOGY > Vol. 125, N° 6 (2009) . - p. 342-351 Titre : Spectral characterisation and computational studies of some novel phenylazoindol-2-one dyes Type de document : texte imprimé Auteurs : Zeynel Seferoglu, Auteur ; Ebru Aktan, Auteur ; Nermin Ertan, Auteur Année de publication : 2010 Article en page(s) : p. 342-351 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : A series of novel phenylazo disperse dyes were prepared by coupling selected diazotised 3- or 4-anilines with indol-2-one. The structures of the synthesised dyes were determined by spectroscopic and analytical methods. Solvent effects on the ultraviolet–visible absorption spectra of these novel dyes were studied. The colour of the dyes was evaluated with respect to the substituent therein. Acid and base effects on the visible absorption maxima of the dyes were also reported. The tautomerism of 3-(phenyldiazenyl)indol-2-one was modelled by density functional theory at the B3LYP level. The ultraviolet–visible absorption spectra for the tautomers were reproduced with the time-dependent density functional theory and semi-empirical Zerner's intermediate neglect of differential overlap/spectroscopic (ZINDO/S) method. The predominance of the keto–hydrazone tautomer was confirmed experimentally and theoretically. DOI : 10.1111/j.1478-4408.2009.00216.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2009.00216.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7624 [article]

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Synthesis, spectral characterisation and antimicrobial activity of new disazo dyes derived from heterocyclic coupling components / Zeynel Seferoglu in COLORATION TECHNOLOGY, Vol. 124, N° 1 (2008)  

[article]  inCOLORATION TECHNOLOGY > Vol. 124, N° 1 (2008) . - p. 27-35 Titre : Synthesis, spectral characterisation and antimicrobial activity of new disazo dyes derived from heterocyclic coupling components Type de document : texte imprimé Auteurs : Zeynel Seferoglu, Auteur ; Nermin Ertan, Auteur ; Ebru Yilmaz, Auteur ; Güven Uraz, Auteur Année de publication : 2009 Article en page(s) : p. 27-35 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : Two series of new disazo dyes were prepared by diazotising 4,4'-diaminodiphenylsulphonamide and 4,4'-diaminodiphenylurea and coupling with 3-methyl-1-phenyl-pyrazoline-5-one, 2-methylindole, 8-hydroxyquinoline, 2-phenylindole, 1-methyl-2-phenylindole, 3-amino-1-phenyl-pyrazoline-5-one. These dyes were characterised by ultraviolet–visible, Fourier transform infrared, nuclear magnetic resonance spectroscopic techniques and elemental analysis. The spectral characterisation of the dyes was evaluated with respect to visible absorption properties in various solvents. The effects of acid and base on the visible absorption maxima of the dyes were also reported. In addition, the antimicrobial effect of the dyes was evaluated. DOI : 10.1111/j.1478-4408.2007.00117.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2007.00117.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3136 [article]

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X-Ray crystal structure analysis and determination of azo-enamine and hydrazone-imine tautomers of two hetarylazo indole dyes / Süheyla Özbey in COLORATION TECHNOLOGY, Vol. 123, N° 6 (2007)  

[article]  inCOLORATION TECHNOLOGY > Vol. 123, N° 6 (2007) . - p. 358-364 Titre : X-Ray crystal structure analysis and determination of azo-enamine and hydrazone-imine tautomers of two hetarylazo indole dyes Type de document : texte imprimé Auteurs : Süheyla Özbey, Auteur ; Arzu Karayel, Auteur ; Gülten Kavak, Auteur ; Zeynel Seferoglu, Auteur ; Nermin Ertan, Auteur Année de publication : 2008 Article en page(s) : p. 358-364 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : Two hetarylazo indole dyes were analyzed by single crystal X-ray diffraction. Dye 1, C18H14N4O, crystallises in the monoclinic system, space group P21/c, with two independent molecules in the asymmetric unit. Dye 2, C20H16N4, also crystallises in the monoclinic system, space group P21/n, Z = 4. In both compounds, there are two intramolecular C–H...N hydrogen bonds which influenced the molecular conformation between the azo group and the indole ring system and its phenyl substituent. Each of the independent molecules of dye 1 interact through the N–H...N hydrogen bond, whereas no classical intermolecular hydrogen bond was observed in dye 2. The molecules of dye 1 and dye 2 are packed differently in both structures. DOI : 10.1111/j.1478-4408.2007.00110.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2007.00110.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6855 [article]

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