Molecules 2012, 17(4), 4266-4280; doi:10.3390/molecules17044266
Article

One-Pot Synthesis of Disperse Dyes Under Microwave Irradiation: Dyebath Reuse in Dyeing of Polyester Fabrics

1 Natural Science Department, College of Health Science, Public Authority for Applied Education and Training, P.O. Box 14281, Fayha 72853, Kuwait 2 Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait 3 Dyeing, Printing and Textile Auxiliaries Department, Textile Research Division, National Research Centre, Dokki, Giza 12622, Egypt 4 Department of Biological Sciences, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
* Author to whom correspondence should be addressed.
Received: 22 March 2012; in revised form: 28 March 2012 / Accepted: 29 March 2012 / Published: 10 April 2012
(This article belongs to the Section Organic Synthesis)
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Abstract: A series of 4-hydroxyphenylazopyrazolopyrimidine disperse dyes were prepared via one-pot reactions of p-hydroxyphenylhydrazone, hydrazine hydrate, and acetylacetone or enaminones using microwave irradiation as an energy source. Structural assignments of the dyes were confirmed by X-ray crystallographic structure determination. Instead of discharging the dyebath after each dyeing cycle, the residual dyebath was spectrophotometrically analyzed and then pH readjusted for a repeat dyeing with longer time. Fastness of the dyed samples was measured after each recycle. Most of the dyed fabrics tested displayed good light fastness and excellent fastness to washing and perspiration. Finally, the biological activity of the synthesized dyes against Gram positive bacteria, Gram negative bacteria and yeast were evaluated.
Keywords: dyebath reuse; polyester fiber; disperse dyes; enaminones; microwave; X-ray crystallographic analysis

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MDPI and ACS Style

Al-Etaibi, A.M.; El-Apasery, M.A.; Mahmoud, H.M.; Al-Awadi, N.A. One-Pot Synthesis of Disperse Dyes Under Microwave Irradiation: Dyebath Reuse in Dyeing of Polyester Fabrics. Molecules 2012, 17, 4266-4280.

AMA Style

Al-Etaibi AM, El-Apasery MA, Mahmoud HM, Al-Awadi NA. One-Pot Synthesis of Disperse Dyes Under Microwave Irradiation: Dyebath Reuse in Dyeing of Polyester Fabrics. Molecules. 2012; 17(4):4266-4280.

Chicago/Turabian Style

Al-Etaibi, Alya M.; El-Apasery, Morsy A.; Mahmoud, Huda M.; Al-Awadi, Nouria A. 2012. "One-Pot Synthesis of Disperse Dyes Under Microwave Irradiation: Dyebath Reuse in Dyeing of Polyester Fabrics." Molecules 17, no. 4: 4266-4280.

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