Modellsysteme zur artifiziellen Photosynthese – Synthese und Elektronentransferstudien neuartiger Sensibilisator‐Relais‐Einheiten

Modell Systems for an Artificial Photosynthesis – Synthesis and Electron Transfer Studies of Novel Sensitizer‐Relais Assemblies Syntheses and determination of electron transfer rates between sensitizers and electron acceptors for a novel class of bis(4,4′‐dimethyl‐2,2′‐bipyridine)[4,4′‐bis(alkoxymethyl)‐2,2′‐bipyridin]ruthenium(II) complexes 6–8 are described. We report on the formation of supramolecular complexes between the dialkoxybenzene‐tethered bisheteroleptic Ru(II)‐bipyridine complexes 5 , 8 and 1,1′‐dimethyl‐4,4′‐bypiridinium ( MV 2+ ) and cyclo‐[bis(1,1′‐ p ‐xylylene‐4,4′‐bipyridinium)] (BXV 4+ ) , respectively. Evidence for the formation of supramolecular sensitizer‐relais assemblies is taken from the viologen radical and hydrogen production rates in sacrificial model systems for artificial photosynthesis.