Fig. 12. Schematic representation of the (a) cytochrome c-556 fragment containing a [(μ-S2)Fe2(CO)6] moiety and a ruthenium-based photosensitizing unit, (b) helical nonadecapeptide containing a [(μ-S(CH2)3S)Fe2(CO)6] motif, and (c) peptide containing an unnatural amino acid linked to a [(μ-pdt)Fe2(CO)6] (10) complex and (d) formation of a heterobimetallic cluster in a heptapeptide construct.
