[Re(Co)(3)(5-Pan)Cl], A Rhenium(I) Naphthalimide Complex For The Visible Light Photocatalytic Reduction Of Co2

A rhenium(i) naphthalimide complex [Re(CO)(3)(5-PAN)Cl] (Re(5-PAN); 5-PAN = 1-(1,10-phenanthroline)-4-nitro-naphthalimide) was synthesized, characterized, and evaluated as a photocatalyst for CO2 reduction. Characterization included use of MALDI-ToF mass spectrometry, FT-IR, RAMAN, H-1 and C-13 NMR, elemental analysis, electronic absorption and emission spectroscopy, single crystal X-ray diffraction, DFT and cyclic voltammetry. Photocatalytic (406 nm) reduction of (CO2)-C-13 to formate ((HCOO)-C-13) in the presence of this catalyst was tracked via(13)C NMR. Results support Re5-PAN (phi = 0.021) functioning as a catalyst for the reduction of CO2 (maximum turn-over 48-50 at 300 equiv. triethylamine as the sacrificial electron donor).