水溶液中紫外吸收剂二乙氨基羟苯甲酰基苯甲酸己酯与水合电子的反应研究
Research on the reaction between UV filter diethylamino hydroxybenzoyl hexyl benzoate and hydrated electron in aqueous solution
本文通过电子束辐照实验与激光闪光光解实验，对水溶液中紫外吸收剂二乙氨基羟苯甲酰基苯甲酸己酯（DHHB）与活性物种水合电子的反应进行了研究。电子束辐照降解DHHB的研究结果表明：当DHHB初始浓度较低时，DHHB的降解率相对较高；通过对辐照降解产物进行分析，获得了去乙基的产物以及醇自由基参与反应的中间产物。通过对激光闪光光解瞬态谱图分析，得到DHHB阴离子自由基的吸收波段位于320 nm - 420 nm，吸收峰位于370 nm左右；通过对690 nm处的吸收变化趋势进一步分析，获得了水合电子与DHHB的二级反应速率常数为（7.2±0.1×109 L mol-1 s-1。
In this paper, the reaction between UV filter diethylamino hydroxybenzoyl hexyl benzoate (DHHB) and hydrated electron (eaq-) in aqueous solution was investigated by electron beam (EB) irradiation experiments and laser flash photolysis (LFP) experiments. The results of EB irradiation showed that the higher degradation efficiency of DHHB was achieved when initial DHHB concentration was lower. The ethyl group was removed and alcohol radicals participated in the degradation of DHHB by the analysis for degradation products. According to the analysis of LFP transient absorption spectra, the absorption range of DHHB anionic radicals was 320 nm - 420 nm, and the absorption peak was around 370 nm. The second-order rate constant between the reaction of DHHB and eaq- was (7.2±0.1)×10９ Lo mol－１os－１ by the analysis of the absorption variation at 690 nm.
李洪静
化学物理学
紫外吸收剂二乙氨基羟苯甲酰基苯甲酸己酯水合电子反应速率常数
UV filterdiethylamino hydroxybenzoyl hexyl benzoate (DHHB)hydrated electron (eaq-)reaction rate constant
李洪静.水溶液中紫外吸收剂二乙氨基羟苯甲酰基苯甲酸己酯与水合电子的反应研究[EB/OL].(2015-05-11)[2025-08-21].http://www.paper.edu.cn/releasepaper/content/201505-98.点此复制
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