含双硫键结构的苯并三唑紫外吸收剂的合成及应用

Synthesis and Application of UV Absorber of Benzotriazole Compound Containing a Disulfide Bond

摘要:

以2-（2-羟基-3，5-二叔丁基苯基）-5-氯代苯并三唑为起始原料，通过将正丁硫醇和碱反应合成正丁硫醇碱金属盐，使两者在非质子溶剂中反应制得含双硫键的苯并三唑化合物—— 5, 5-二硫-双-（2-（2-羟基-3, 5-二叔丁基苯基）-2H-苯并三唑）；通过1HNMR、FTIR、元素分析、FABMS等确定化合物分子结构，通过UV测试，测得其最大紫外吸收波长为364nm，与普通商用紫外光吸收剂相比波长红移了约11nm，且其在最大吸收波长处具有非常高的摩尔吸光系数，可达55000 L/(mol挠洀)，是普通商用紫外光吸收剂的1倍以上，可以保护塑料、涂料和人的皮肤免受此类紫外光(320～400nm) 的损害，具有广泛应用价值。

Abstract:

5,5-Thiobis-(2-(2-hydroxy -3,5 -di -tert -butylphenyl)-2H-benzotriazole)which have a benzotriazole and a disulfide bond was synthesized from 2-(2-hydroxy-3，5-di-tert-butyl)-5-chloroazimino-benzene and n-butyl mercaptan alkali metal salt，with 1-Methyl-2-pyrrolidinone in the absence of solvent .The structure was characterized by 1HNMR, FTIR, FABMS. The UV spectra were measured,the maximum UV absorption wavelength is 364nm, as compared with the ordinary commercial UV absorber wavelength is 353nm, and it has a very high molar absorptivity, up to 55000 L/(mol挠洀) in the maximum absorption wavelength, which is 2 times than the commercial UV absorber. It can protect plastics, coatings and person's skin from ultraviolet (320～400nm) damage. Has a wide application value.