Title:Investigation of the Dyeing Ability of Some Reactive Triazine Azo Dyes
Containing Pyrazole Fragment
Volume: 21
Issue: 3
Author(s): Alaa Z. Omar*, Mohamed G. Mohamed, Ezzat A. Hamed and Mohamed A. El-Atawy*
Affiliation:
- Department of Chemistry, Faculty of Science, Alexandria University, Ibrahemia, Alexandria, 21321, Egypt
- Department of Chemistry, Faculty of Science, Alexandria University, Ibrahemia, Alexandria, 21321, Egypt
- Department of Chemistry, Faculty of Science, Taibah University, Yanbu, 46423, Saudi Arabia
Keywords:
Reactive 1, 3, 5-triazine azodyes, pyrazole, fastness properties, polyester, cotton, blended fabrics, DFT.
Abstract:
Background: A series of reactive disperse dyes bearing azo and cyanuric groups were
synthesized, and their structures were established using spectral and elemental analyses.
Methods: The IR, 1H NMR, and DFT studies indicated that the prepared reactive disperse dyes
predominately exist as hydrazone tautomers. The electronic absorption spectra in methanol were
observed and compared to those computed using B3LYP/6-311G(d,p). The dyeing efficiency of
the produced dispersed reactive dyes was examined on polyester, cotton, and polyester/cotton
blended fabrics.
Results: The degree of exhaustion and the fastness properties of the dyed samples in terms of
perspiration, washing, scorch and light fastness were assessed. It was found that reactive disperse
dyes under investigation have a higher affinity for dyeing polyester textiles than cotton textiles.
Conclusion: Moreover, the reflectance and color strength of the synthesized dyes were measured
and discussed.
