Synthesis and application of novel reactive dyes based on Dimedone moiety | ||||
| Egyptian Journal of Chemistry | ||||
| Article 24, Volume 63, Issue 11, November 2020, Page 4447-4455 PDF (492.36 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2020.24092.2437 | ||||
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| Authors | ||||
Fatma A. Mohamed   1; Saadia A. Abd El-Megied2; Raffat Mohareb3
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| 1El Tahrir Street, Dokki Dokki | ||||
| 2TRD, NRC | ||||
| 3Chemistry Department, Faculty of Science, Cairo University, Cairo, Egypt | ||||
| Abstract | ||||
| The purpose of this paper is to synthesis, characterize and find out properties of some new bifunctional dye Bis (monochlorotriazine) (MCT) and heterobifunctional (monochlorotriazine / sulphatoethylsulphone) (MCT/SES) reactive dyes using Dimedone moiety (5,5-Dimethylcyclohexane-1,3-dione) bearing good color strength, lightfastness, and other favourable properties. The first dye A is synthesized and coupled with diazonium salts having the reactive groups. But the second dye B is synthesiezed of Dimedone moiety (2-amino4,4-dimethy,3-cyano,6-oxo-beno[b] thiophene) then diazotized and coupled with 1-amino-8-naphthol-3,6-disulphonic acid (H-acid) to produce mono azo intermediate. Such product products reacted with 2,4,6-trichloro-1,3,5-triazine in 1:1 molar ratio afforded via nucleophilic displacement with 1,4-phenylenediamine in 2:1 molar ratio to give bis monochlorotriazine reactive dyes thus yielding the new target reactive. The synthesized dyes were applied onto cotton, silk and wool fabric under the typical exhaust dyeing conditions and their dyeing properties were investigated. The results assessed for dyeing indicate high quality dyeing properties However, the homobifunctional (bis MCT) dyes showed higher exhaustion and fixation values, color yield and fastness properties than heterobifunctional (MCT/SES). | ||||
| Keywords | ||||
| Cotton-Wool-Silk; Fabric; Bifunctional reactive dyes; Dimedone; Bis monochlorotriazine dyes; Structure elucidation, Dyeing | ||||
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