New evidence against hydroxyl radicals as reactive intermediates in the thermal and photochemically enhanced fenton reactions
New evidence against hydroxyl radicals as reactive intermediates in the thermal and photochemically enhanced fenton reactions
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DOI：
10.1021/jp980129j
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发表时间：
1998-07-09
影响因子：
2.9
通讯作者：
Braun, AM
中科院分区：
文献类型：
--
作者：
Bossmann, SH;Oliveros, E;Braun, AM
在2，4-二甲基苯胺（2，4-二甲基苯胺）的氧化降解过程中，通过H2 O2/UV方法，形成一系列羟基化的芳香胺，这一结果证实了羟基自由基作为氧化链反应的引发剂的作用。在2，4-二甲基苯胺（2，4-xylidine）存在下的热或光化学增强的芬顿反应主要产生作为中间产物的2，4-二甲基苯酚，其成因只能由电子转移机理来解释。这种机制的实验证据，并给出了光化学增强还原铁（III）铁（II）在水溶液中的2，4-二甲基苯胺的量子产率值。
During the oxidative degradation of 2,4-dimethylaniline (2,4-xylidine) by means of the H2O2/UV method, a series of hydroxylated aromatic amines are formed, this result confirming the role of the hydroxyl radical as an initiator of the oxidative chain reaction. Thermal or photochemically enhanced Fenton reactions in the presence of 2,4-dimethylaniline (2,4-xylidine) yield primarily 2,4-dimethylphenol as an intermediate product, the genesis of which may only be explained by an electron transfer mechanism. Experimental evidence for such a mechanism is presented, and values for the quantum yields of the photochemically enhanced reduction of iron(III) to iron(II) in aqueous solutions of 2,4-xylidine are given.