Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA, CCT La Plata-CONICET/UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina.
Photochem Photobiol. 2012 Jul-Aug;88(4):810-5. doi: 10.1111/j.1751-1097.2012.01116.x. Epub 2012 Mar 28.
The reactions of Br(2)(˙-), Br˙, HO˙ and N(3)˙ with Aldrich humic acid (AHA) were investigated. The Br/Br(2)(˙-) radicals were obtained in flash-photolysis experiments (λ(exc) = 266 nm) performed with NaS(2)O(8) solutions in the presence of bromide ions. HO˙ and N(3)˙ radicals were generated by pulse radiolysis of N(2)O-saturated solutions. From the combination of a bilinear analysis and computer simulations of the absorbance traces, it was possible to obtain information on the rate constants for the reactions of Br(2)(˙-), Br˙, HO˙ and N(3)˙ with AHA and on the intermediate species involved in the mechanism. Evidence for the participation of phenoxyl radicals (λ(max) = 410 nm) is given.
研究了 Br(2)(˙−)、Br˙、HO˙ 和 N(3)˙与 Aldrich 腐殖酸 (AHA) 的反应。在 NaS(2)O(8) 溶液中存在溴化物离子的闪光光解实验（λ(exc) = 266nm）中获得了 Br/Br(2)(˙−)自由基。HO˙和 N(3)˙自由基通过 N(2)O 饱和溶液的脉冲辐射分解产生。通过对吸光度迹线进行双线性分析和计算机模拟，可以获得 Br(2)(˙−)、Br˙、HO˙和 N(3)˙与 AHA 反应的速率常数以及反应机制中涉及的中间物种的信息。给出了酚氧自由基（λ(max) = 410nm）参与的证据。
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