Electron-Transfer Oxidation of Chlorophenols by Uranyl Ion Excited State in Aqueous Solution. Steady-State and Nanosecond Flash Photolysis Studies
作者:Mohamed Sarakha、Michèle Bolte、Hugh D. Burrows
DOI:10.1021/jp993676t
日期:2000.4.1
The oxidation of chlorophenols by photoexcited uranyl ion was studied in aqueous solution at concentrations where the ground-state interactions were negligible. Nanosecond flash photolysis showed that a clean electron-transfer process from the chlorophenols to the excited uranyl ion is involved. This is suggested to lead to the formation of a U(V)/chlorophenoxyl radical pair complex. The efficiency
在水溶液中研究了光激发铀酰离子对氯酚的氧化作用,其基态相互作用可忽略不计。纳秒闪光光解表明,涉及从氯酚到激发的铀酰离子的干净电子转移过程。这被认为导致形成 U(V)/氯苯氧基自由基对复合物。这种电荷转移过程的效率对于三种氯酚来说是统一的。然而,低产物产率表明,在没有氧气的情况下,在自由基对内以及从分离的铀 (V) 到苯氧基自由基的反电子转移似乎是主要的反应途径。在氧气存在下,氯苯酚消失和光产物形成的量子产率增加。