This work is primarily dedicated to the synthesis of numerous tri- and tetradentate N,O-chelating ligands which should be capable to coordinate manganese in different oxidation states and to form stable complexes. These ligands should be stable in aqueous solution over a wide range of possible pH-values and should resist oxidative decomposition. These requirements are based on the objective target to use the resulting complexes as bleach-catalysts for the activation of the low-cost oxidizing agent hydrogen peroxide in laundry detergents. Furthermore these complexes should be compatible with all other typical ingredients of the detergent. Laying the focus on manganese as redox-catalytic centre is a consequence of its ability to form a variety of stable compounds and to show high activities in bleaching systems. Additional to that manganese provides the benefit to be non-toxic and that manganese-complexes are already known in activation of hydrogen peroxide (Chap. 3.3). The suitability of the synthesized complexes for usage in laundry detergents is finally tested under standardized conditions at HENKEL.
Döring, Jan Christoph: Neue katalytische Bleichaktivatoren auf Basis von Mangan-Chelatkomplexen. : Philipps-Universität Marburg 2013-04-10. DOI: https://doi.org/10.17192/z2013.0120.
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