二苯甲酮类聚乙二醇单甲醚基水溶型紫外线吸收剂的合成与表征

Synthesis and characterization of polyethyleneglycol methyl ether-based ultraviolet absorbing with groups of benzophenon

将2，4-二羟基二苯甲酮（UV—O）与氯乙酰氯反应合成2-羟基-4-氯乙酸酯基二苯甲酮（2H4CBP）中间体，然后利用氯乙酸酯基中活泼α-氯与聚乙二醇单甲醚醇钠反应，合成了一种新型聚乙二醇单甲醚基水溶型紫外线吸收剂，并对产物进行了结构表征。产物有较好的光稳定性，其水溶液在243、290、322nm处与UV-0有类似的3条特有吸收谱带，对波长200—400nm的紫外光有良好的吸收作用。

A new type of water-soluble ultraviolet absorbers containing polyethylene glycol methyl ether derivates was synthesized via the reaction of sodium alkoxide and a-chlorine of 2-hydroxy-4-chloroacetate benzenphenone that was obtained by esterifying 2,4-dihydoxybenzophenone with chloracetyl chloride, and characterized. The product has good photo-stability, and its aqueous solution have three typical intensive and broad absorption bands in ultraviolet region at about 243 nm, 290 nm and 322 nm,and shows effective ultraviolet absorptive ability in wavelengths between 200 nm and 400 nm.