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.
一系列
4-羟基苯基偶氮
吡唑吡啶分散染料通过在微波辐射作为能量源的情况下,将对羟基苯基腙、 hydrate 及乙酰乙酮或烯胺酮进行一锅反应制备而成。通过X射线晶体结构测定确认了
染料的结构分配。与每次染色周期后排放染浴不同,残留的染浴经过分光光度法分析后,pH值被重新调整,以便进行更长时间的重复染色。染色样品的快干性能在每次回收后进行测量。大多数测试过的染色织物显示出良好的光牢度以及优异的洗涤和汗
水牢度。最后,评估了合成
染料对革兰氏阳性细菌、革兰氏阴性细菌和酵母的
生物活性。