RESEARCH FORMATION OF HIGH VALENT IRON - OXO IN AQUEOUS SOLUTION OF Fe-TAML/H2O2 CATALYTIC SYSTEM

Abstract

    Iron(III)-tetraamidomacrocyclic ligand activators (Fe(III)-TAML) of hydrogen peroxide are the members of the new class of „green‟, nontoxic catalysts and since a few years are the subject of great interests and it‟s applications is very wide [5,6]. Reaction mechanism of Fe(III)-TAML catalyst is not the same mechanism of Fenton reaction, Instead of generating free radical, Fe(III)-TAML catalyst react with peroxides to generate high valent iron-oxo intermediates [1-7]. Although the formation of iron-oxo intermediates occur in very short time but the studing of the formation of iron-oxo is very important to understand reaction mechanism of Fe-TAML catalyst. In this article we will present research results of the formation of iron-oxo in aqueous solution of Fe-TAML catalystic system, such as the spectral changes of Fe-TAML catalystic solution with different pH values; the spectral of the formation of iron-oxo, the spectral changes of the formation of iron-oxo with different pH values and the spectral changes of iron-oxo with different rate of H2O2/Fe-TAML.

Keywords: Fe-TAML, iron -oxo, catalysts green.