酸性橙7降解的微观反应机理及动力学研究  

Mechanism and Kinetics Studies on the Degradation of Acid Orange 7

作　　者：刘士姮[1] 汪世龙[1] 孙晓宇[1] 李文哲[1] 倪亚明[1] 王文峰[2] 王敏[2] 姚思德[2] 

机构地区：[1]同济大学化学系测试中心,上海200092 [2]中国科学院上海原子能核研究所纳米生物医学研究室,上海201800

出　　处：《光谱学与光谱分析》2005年第5期776-779,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(20077019)资助项目

摘　　要：采用纳秒级时间分辨脉冲辐解技术,考察了典型的萘酚型偶氮染料酸性橙7(AcidOrange7,简称AO7)在水溶液中与羟基(·OH)和水合电子(e-aq)的微观反应,对反应瞬态吸收图谱作了归属,通过跟踪瞬态吸收的生成动力学求得了反应速率常数,并结合AO7水溶液γ辐解前后的UV Vis吸收变化,提出了相应的反应机理。The reactions of center dot OH and e(aq)(-) with AO7 in aqueous solutions were studied by nano-second pulse radiolysis techniques. The transient absorption spectra were attributed and the second order reaction rate constants were determined by following the buildup kinetics of the transient absorptions. In combination with the analysis of the UV-Vis absorption changes of AO7 after gamma-radiolysis, the underlying reaction mechanisms were elucidated.

关 键 词：酸性橙7 脉冲辐解 瞬态图谱 γ-辐解 降解机理 

分 类 号：O625.3[理学—有机化学] X131.2[理学—化学]