Hangman Porphyrin Compounds as biomimetic models for selective oxidation reactions via activation of hydrogenperoxide and dioxygen
Abstract
Artificial catalytic systems based on the hangman porphyrin architecture will be developed to bridge homogeneous, heterogeneous and biological catalysis. We will focus on the modification of a xanthene scaffold that holds on the one hand a proton-donor-acceptor functionality (e.g. carboxylic or pyridyl group) and on the other hand a metallo porphyrinic unit. The metallo porphyrin will consist of special determined aryl functionalities in meso-position that will allow for certain application. First, we will investigate the catalytic behavior of the catalysts in homogeneous systems. Second, on introducing water-soluble meso-aryl groups, we can conduct investigations under biological conditions (i.e. in water). Third, on introducing polymerizable aryl groups, we can create functional organic frameworks that can be used for heterogeneous catalysis. In all three cases we will investigate the activity and selectivity in activation of hydrogenperoxide and/or dioxygen and the ability to oxidize organic molecules; i.e. resemble biological oxygenases. Different spectroscopic and electrochemical methods will be used to isolate and characterize intermediates and, thus, allow for proposals of the catalytic mechanism.
Principal investigators
Financer
DFG Excellence Initiative Cluster
Duration of project
Start date: 11/2012
End date: 10/2017
