Abstract
As global warming is causing concerning climate changes on Earth due to excessive anthropogenic emission of greenhouse gases, especially CO2, there is an urgent need to find new solutions to reduce the concentrations of emitted CO2, preferably by converting CO2 into useful chemicals. The development of improved photocatalytic systems for CO2 reduction using ruthenium(II) polypyridyl complexes represents one of the possible approaches to combat high CO2 concentrations in the atmosphere. Here, we present the photocatalytic activity of some ruthenium(II) polypyridyl complexes with N,N- and N,S-ligands which exhibit activity in the reduction of CO2 to CO under visible light, as well as their spectroscopic and electrochemical properties. Two ruthenium complexes with three N,N-ligands showed a better photocatalytic performance than the complexes with two N,N- and one N,S-ligand.
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