活性染料在中性盐溶液中的聚集

The Aggregation of Reactive Dyes in Neutral Salt Solution

用紫外可见光谱法研究了不同母体结构的五只乙烯砜硫酸酯活性染料和两只双一氯均三嗪活性染料在硫酸钠溶液中的聚集情况。分子结构较小的乙烯砜硫酸酯染料聚集程度较低;含H酸结构的活性染料因母体结构和活性基的不同在盐溶液中的聚集程度相差较大,双一氯均三嗪的C.I.活性红120聚集程度很大,在高浓度中性盐溶液中存在多种聚集体的平衡;铜酞菁结构的乙烯砜硫酸酯活性染料在盐溶液中聚集程度较高,其吸收光谱中存在明显的染料单分子和二聚体的吸收峰。

UV-Vis spectrophotometry was used to investigate the aggregation of five sulfatoethylsulfone and two bis （monochloro-s-triazinc） reactive dyes in sodium sulfate solution. The sulfatoethylsulfone dyes with small molecules had low aggregation degree. The aggregation degree of the reactive dyes with H-acid structure varied from their chromophores and reactive groups, and among these dyes, C. I. Reactive Red 120 had very high aggregation degree and multiform aggregates in concentrated Sodium sulfate solution. The sulfatoethylsulfone dye containing copper phthalocyanine chromophore exhibited high aggregation degree and two peaks in visible absorption spectrum, which corresponded to the monomer and dimme rabsorption, respectively.