Web21 de mai. de 2014 · Nine new bis-azo dyes derived from 5-arylidene-2,4-thiazolidinone have been synthesized in two steps using Knoevenagel condensation and diazotization-coupling reaction. The structures of the compounds were confirmed by UV–vis, IR, 1 H NMR and 13 C NMR spectroscopic techniques. Web1 de out. de 1999 · These azo dyes have been used to dye cotton and wool fibre, further their spectroscopic data and application properties were estimated. Especially, it was …
Preparation of Dis-Azo Dyes Derived from p-Aminophenol and …
Web31 de mai. de 2014 · New heterocyclic monoazo dyes derived from arylazopyrazolopyimidine were obtained by the reaction of 2,5 diaminopyrazoles derivatives with 2-cyanomethyl benzothiazole .The structure of the prepared dyes are established using element analysis ,IR,1H-NMR and Mass spectra . The prepared dyes have been tested … Web10 de abr. de 2024 · These results indicated the rapid degradation of AZO dyes and the improvement of their photocatalytic performance. Fig. 4. Absorption ... M.M. Motawea, A.M. Aboraia, M.F. Cheira, M.T. Alotaibi, S.M. El-Bahy, H.M. Ali, A hybrid mesoporous CuO@barley straw-derived SiO 2 nanocomposite for adsorption and photocatalytic … iowa state football rumors
On the azo dyes derived from benzoic and cinnamic acids used as ...
Web7 de mar. de 2014 · New 1,2,4-triazole colorants were obtained, in high yields, by coupling 3-ethylthio-5-cyanomethyl-4-phenyl-1,2,4-triazole (1) with diazotized aniline derivatives 2, 4 and 6. The azo dyes prepared in this work may exist in three tautomeric forms. We found that the tautomerism is influenced mainly by the nature of substituent at the para position … WebHá 2 dias · Download Citation On Apr 12, 2024, Hend A. Hekal and others published Synthesis, Computational Studies, Molecular Docking, Anti‐inflammatory and Antioxidant Activities of α ... http://www.ijarp.org/published-research-papers/nov2024/Synthesis-And-Application-Of-Heterocyclic-Disperse-And-Acid-Dyes-Derived-From-2-aminothiophene-And-Conventional-Amines-As-The-Diazo-Components.pdf iowa state football roster 1982