New evidence against hydroxyl radicals as reactive intermediates in the thermal and photochemically enhanced fenton reactions

被引：490

作者：

Bossmann, SH ^{[1
]}

Oliveros, E ^{[1
]}

Göb, S ^{[1
]}

Siegwart, S ^{[1
]}

Dahlen, EP ^{[1
]}

Payawan, L ^{[1
]}

Straub, M ^{[1
]}

Wörner, M ^{[1
]}

Braun, AM ^{[1
]}

机构：

[1] Univ Karlsruhe, Engler Bunte Inst, Lehrstuhl Umweltmesstech, D-76128 Karlsruhe, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 1998年 / 102卷 / 28期

关键词：

D O I：

10.1021/jp980129j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：5542 / 5550

页数：9

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