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.

中文翻译：

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部分含吡唑片段的活性三嗪偶氮染料染色性能的研究

合成了一系列带有偶氮基团和氰尿基团的活性分散染料，并通过光谱和元素分析确定了它们的结构。方法：IR、1H NMR 和 DFT 研究表明所制备的活性分散染料主要以腙互变异构体形式存在。观察甲醇中的电子吸收光谱，并与使用 B3LYP/6-311G(d,p) 计算的电子吸收光谱进行比较。测试了所生产的分散活性染料在涤纶、棉以及涤/棉混纺织物上的染色效率。结果：评估了染色样品的吸尽程度和耐汗、耐洗、耐焦、耐光牢度性能。结果发现，所研究的活性分散染料对涤纶纺织品的染色亲和力高于棉纺织品。结论：此外，还测量并讨论了合成染料的反射率和颜色强度。