Biomimetische Photosynthese Systeme - Selektive Totalsynthese und Strukturelle Charakterisierung

Abstract

The special pair formed from two chlorophyll subunits plays a decisive role as the primary donor of photosynthetic reaction centres of bacteria and plants. In natural systems the structural arrangement of the special pair is achieved by interactions of the chlorophyll subunits with the protein environment. To mimic this arrangement we aimed on synthesis of enantiomerically pure chlorin subunits with carboxylic acid groups and masked amino functions Theses functionalities allow peptide linkages between two chlorin subunits or chlorin subunits and electron acceptors. Structural investigations of the conformation of the peptide linked chlorin subunits should elucidate the spacial arrangement of the model dyads. The overall concept should open a tool box access to dyads, tetrads and higher oligomers covalently linked by peptide bonds.