Fig. 5. Identification of iron and C_nX_mCOO⁻-based light-harvesting species. (a) DFT calculations on iron and C_nX_mCOO⁻-based light-harvesting species. (b) Experimental evidence for CH₃CN/CCl₃CN as the second ligand. (c) CH₃CN as the second ligand to promote the reaction.