Rhenium Complexes Based on 2-Pyridyl-1,2,3-triazole Ligands: A New Class of CO2 Reduction Catalysts

摘要: A series of [Re(N^N)(CO)3(X)] (N^N = diimine and X halide) complexes based on 4-(2-pyridyl)-1,2,3-triazole (pyta) 1-(2-pyridyl)-1,2,3-triazole (tapy) ligands have been prepared electrochemically characterized. The first ligand-based reduction process is shown to be highly sensitive the nature isomer as well substituents pyridyl ring, with peak potential changing by up 700 mV. abilities this class catalyze electroreduction photoreduction CO2 were assessed for time. It found that only Re pyta a wave at ca. −1.7 V vs SCE are active, producing CO major product, together small amounts H2 formic acid. catalytic observed in CVs enhanced addition water or trifluoroethanol proton source. Long-term controlled electrolysis experiments gave total Faradaic yield close 100%. In particular, funct...