A facile synthesis and tautomeric structure of novel 4‐arylhydrazono‐3‐(2‐hydroxyphenyl)‐2‐pyrazolin‐5‐ones and their application as disperse dyes
| العنوان: | A facile synthesis and tautomeric structure of novel 4‐arylhydrazono‐3‐(2‐hydroxyphenyl)‐2‐pyrazolin‐5‐ones and their application as disperse dyes |
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| المؤلفون: | Moaz M. Abdou, Mohamed A. Metwally, Samir Bondock, El-Sayed I. El-Desouky |
| المصدر: | Coloration Technology. 129:418-424 |
| بيانات النشر: | Wiley, 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | Materials Science (miscellaneous), General Chemical Engineering, Hydrazine, Photochemistry, Tautomer, Acid dissociation constant, Polyester, chemistry.chemical_compound, chemistry, Hammett equation, Chemistry (miscellaneous), Computational chemistry, Excited state, Dyeing, Hydrate |
| الوصف: | The main target of this paper was the synthesis of novel azo disperse dyes with better dyeing properties, together with a systematic investigation to determine their dominant tautomer(s) from 12 possible tautomeric structures. In this regard, novel azopyrazolin-5-one dyes were synthesised via the reaction of hydrazine hydrate with 2,3,4-chromantrione-3-arylhydrazones. The acid dissociation constants both in the ground and in the excited state for the series prepared were determined and correlated by the Hammett equation. The results of this correlation, together with spectral data, indicated that the compounds under scrutiny exist predominantly in the keto-hydrazo structure as a Z-configuration, both in the ground and in the excited state. Finally, the synthesised dyes were applied as disperse dyes for dyeing polyester fabrics, and their fastness properties were evaluated. Also, the position of colour in CIELAB coordinates was estimated and discussed. |
| تدمد: | 1478-4408 1472-3581 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::633082f64428227a88b9c55de9c311e8Test https://doi.org/10.1111/cote.12052Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........633082f64428227a88b9c55de9c311e8 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14784408 14723581 |
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