Rhenium(i) trinuclear rings as highly efficient redox photosensitizers for photocatalytic CO₂ reduction.

ABSTRACT: We developed new cyclic Re(i)-based trinuclear redox photosensitizers with both high oxidation power in the excited state and strong reduction power in the reduced form. These excellent properties were achieved by introducing electron-donating groups on the diimine ligand of the Re(i) metal centre and by connecting each Re(i) unit with polyphenyl-bisphosphine bridging ligands. These Re-rings were applied to homogenous visible light-driven photocatalytic CO₂ reduction in conjunction with various mononuclear catalysts, such as Re(i), Ru(ii) and Mn(i) metal complexes, employing a relatively weak sacrificial electron donor, triethanolamine. Each system showed good product selectivity (CO or HCOOH) and an excellent quantum yield of product formation Φ_CO = 0.60 to 0.

SUBMITTER: Rohacova J 

PROVIDER: S-EPMC5355825 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature