New Mechanistic Aspects of the Fenton Reaction

被引：101

作者：

Rachmilovich-Calis, Sandra ^{[1
]}

Masarwa, Alexandra ^{[1
]}

Meyerstein, Naomi ^{[2
]}

Meyerstein, Dan ^{[1
,3
]}

van Eldik, Rudi ^{[4
]}

机构：

[1] Ben Gurion Univ Negev, Dept Chem, Beer Sheva, Israel

[2] Ben Gurion Univ Negev, Fac Hlth Sci, Dept Physiol, Beer Sheva, Israel

[3] Ariel Univ, Dept Biol Chem, Ctr Samaria, Ariel, Israel

[4] Univ Erlangen Nurnberg, Dept Chem & Pharm, D-91058 Erlangen, Germany

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2009年 / 15卷 / 33期

关键词：

activation parameters; Fenton reaction; kinetics; mechanism; oxidation; TRANSITION-METAL-COMPLEXES; AERATED AQUEOUS-SOLUTIONS; HYDROGEN-PEROXIDE; OXIDATION; ACTIVATION; CHEMISTRY; ION; DECOMPOSITION; RADICALS; DIOXYGEN;

D O I：

10.1002/chem.200802572

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The kinetics of the Fenton reaction was studied in detail. A second reaction step in the presence of excess H2O2 is attributed to formation of the complex Fe-III(-O2H)(aq). Therefore, the reaction of Fe(H2O)(6)(2+) with Fe-III(-O2H)(aq) in the presence of Fe-II to form Fe-aq(III) (k = (7.7 +/- 1.5) x 10(5) M-1 S-1) may contribute to the overall Fenton reaction, and could account for some of the debate in the literature concerning its detailed mechanism. If this is correct for LFeIII(-O2H)(aq) also, then it might be of significant biological importance. The activation parameters Delta H double dagger, Delta S double dagger, and Delta V double dagger for the Fenton reaction were measured under various experimental conditions, and are used in the mechanistic interpretation.

引用

页码：8303 / 8309

页数：7

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