吡啶酮型苯并三唑紫外线吸收剂的合成与光谱特性

摘要

以二氧化硫脲为还原剂,将C.I.分散黄119还原为吡啶酮型苯并三唑紫外线吸收剂UV-1,采用紫外-可见光谱、红外光谱、核磁氢谱、质谱等分析手段验证了还原产物的分子结构.研究结果表明,紫外线吸收剂UV-1在乙醇溶液中的最大吸收波长为329 nm,摩尔消光系数较高.紫外线吸收剂UV-1在涤纶织物上有一定的上染能力,适合作为涤纶用紫外线吸收剂.%C. I. Disperse yellow 119 is reduced by Thiourea S, S-Dioxide to synthesize the pyridone type benzotriazole UV-absorber UV-1, which the chemical structure is confirmed by UV-vis, FTIR, 1H-NMR and mass spectrometry. It is observed that Amax of UV-1 in ethanol is 329 nm and its molar extinction coefficient is high. The uptake rate of UV-1 on polyester is stable, so it is suitable for application onto polyester.