Hunan Provincial Key Laboratory of Environmental Catalysis & Waste Recycling, College of Materials and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China.
Molecules. 2022 Nov 24;27(23):8169. doi: 10.3390/molecules27238169.
Substituent effects on the ultraviolet absorption properties of 2,4-dihydroxy dibenzophenone were investigated experimentally. Nine compounds of 2,4-dihydroxy dibenzophenone with different substituents were prepared by a solvent-free reaction of benzoyl chloride. The maximum absorption wavelength (λ) of these samples was measured, and their UV resistance properties in cotton fabric as well as in polyester were determined. The results show that the λ is dependent on the substituents at the benzylidene ring, and both electron donating substituents and electron withdrawing substituents cause a bathochromic shift. The UV resistance of fabric increases with the increase in compound concentration. The dyeing rate of each compound on polyester was higher than that of cotton. On cotton fabric, the dyeing rate of 2,4-dihydroxybenzophenone was the highest, 77.8%. On polyester, that of 2,4-dihydroxy-4'-ethyl dibenzophenone was the highest, 84.1%. The study provides new insights into the effect of substituents on the properties of 2,4-dihydroxy dibenzophenone that are related to the whitening of cotton and polyester materials.
实验研究了取代基对 2,4-二羟基二苯甲酮紫外吸收性质的影响。通过无溶剂反应合成了 9 种不同取代基的 2,4-二羟基二苯甲酮化合物。测量了这些样品的最大吸收波长(λ)，并测定了它们在棉织物和聚酯中的耐紫外线性。结果表明，λ取决于亚苄基环上的取代基，供电子取代基和吸电子取代基都导致红移。织物的耐紫外线性随着化合物浓度的增加而增加。每种化合物在聚酯上的上染率均高于棉。在棉织物上，2,4-二羟基二苯甲酮的上染率最高，为 77.8%。在聚酯上，2,4-二羟基-4'-乙基二苯甲酮的上染率最高，为 84.1%。该研究为取代基对与棉和聚酯材料增白相关的 2,4-二羟基二苯甲酮性质的影响提供了新的见解。
