Natural Science Department, College of Health Science, Public Authority for Applied Education and Training, P.O. Box 14281, Fayha 72853, Kuwait.
Molecules. 2012 Apr 10;17(4):4266-80. doi: 10.3390/molecules17044266.
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.
通过微波辐射作为能量源，对 p-羟基苯腙、水合肼和乙酰丙酮或烯胺酮进行一锅反应，制备了一系列 4-羟基苯偶氮吡唑嘧啶分散染料。通过 X 射线晶体结构测定确认了染料的结构。与每次染色循环后排出染浴不同，对残留染浴进行分光光度分析，然后调整 pH 值以进行更长时间的重复染色。每次循环后测量染色样品的牢度。测试的大部分染色织物显示出良好的耐光牢度和优异的耐洗和耐汗牢度。最后，评估了合成染料对革兰氏阳性菌、革兰氏阴性菌和酵母的生物活性。
