Donnerstag, 19. November 2015, 15:00 - 16:30 iCal

Dr. Matthias Schwalbe /

Institut für Chemie, Humboldt-Universität zu Berlin/ Deutschland

"Photochemical CO2 reduction catalyzed by mono- and dinuclear phenanthroline-extended tetramesityl porphyrin complexes"

Fakultät für Chemie, Institut für Theoretische Chemie, Seminarraum 415-417
Währinger Straße 17, 1090 Wien


The catalytic reduction of CO2 to CO or into liquid fuels represents a crucial challenge due to the global warming problem and the fossil fuel scarceness. This energy demanding process is favorably driven using sunlight as energy source.[1,2]

Fujita and Neta could show that iron and cobalt porphyrins are suitable for photochemical CO2 reduction.[3] We like to develop their system further and use mono- and dinuclear complexes with a phenanthroline-extended tetramesityl porphyrin ligand (H2-1).[4] This ligand can selectively coordinate a second metal fragment in the phenanthroline coordination sphere while any other metal can reside in the porphyrin cavity. This allowed the construction of multiple heterodinuclear compounds and the influence of any metal center on the lightdriven CO2 reduction activity could be tested.

Thorough catalytic investigations on M-1 compounds (M = 2H, Cu, Pd, Co, FeCl) with or without a second metal fragment attached (i.e. a Ru(tbbpy)2 or Re(CO)3Cl fragment) were done in DMF saturated with CO2 and in the presence of triethylamine (TEA) as sacrificial electron donor.


Fakultät für Chemie


Brigitte Schwarz
Fakultät für Chemie der Universität Wien