P3.1 Visible-light-mediated oxalate synthesis from CO2 through a TM-photoredox cascade
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This work page focuses on the development of suitable photoredox catalysts for the turn-over of transition metal biscarboxylate complexes of defined organometallic complexes for the photo-mediated oxalate synthesis from carbon dioxide. In a joint project with the Beller group (TP1), several bismethoxycarbonyl bipyridyl palladium complexes have been developed. The reductive elimination of dialkyloxalate was identified as a major hurdle for the catalyst turn-over. The reductive elimination will be induced through a visible light-mediated photoredox cascade. Three different approaches will be investigated: (i) direct reductive elimination through excitation of bismethoxycarbonyl complexes, (ii) synthesis and characterization of bimetallic bismethoxycarbonyl complexes bearing iridium and ruthenium-based photoredox-active nuclei and, (iii) investigations concerning oxalate synthesis from bismethoxycarbonyl complexes using photoredox-active co-catalysts