Lead corrole complexes in solution: Powerful multielectron transfer reagents for redox catalysis

Recent progress in homogeneous multielectron transfer photocatalysis and artificial photosynthetic solar energy conversion

“…The next important stage of development in this promising direction towards "powering the planet" with artificial photosynthetic devices will require a successful coupling of an efficient bio-inspired water oxidation process to the solar fuel generating reactions described here. Some of the most difficult catalytic key-steps, such as visiblelight induced O-O bond formation involving water as the terminal electron donor, have already been addressed with light-driven enzyme models based on strongly oxidizing, high-valent metal-oxo bond containing multielectron transfer photosensitizers [2,21,49,50]. A fully operating synthetic counterpart of natural photosystem II (PS II), the light-driven water: plastoquinone oxidoreductase, however, still remains to be discovered more than hundred years after the first attempts to mimic green plants [1].…”

Synthesis and Some Physical-Chemical Properties of meso-Aryl- and Alkyl Substituted Corroles and their Metal Complexes

“…The low stability to photo destruction of metal complexes of corroles with bismuth and lead was noted in works. [28,29] Irradiation of the FePh 3 Cor solution in benzene with UV light is accompanied by a 3-5 nm bathochromic shift of the maximum absorption band of the complex. After 90 minutes of illumination the position of the absorption band stabilizes (Figure 1), probably due to a change in the degree of oxidation of Fe from 3 + to 4 + .…”

The concept of photochemical enzyme models – State of the art

“…With this class of bio-inspired enzyme model systems a stepwise four-electron transfer sequence resembling the respiratory O 2 transformation of cytochrome c oxidase has also been demonstrated [43]. Among the sensitizer chromophores well-suitable for the construction of photoenzymes with artificial oxidase reactivity are tetrapyrrole-based macrocyclic ligands such as porphyrins, phthalocyanines and corroles [43,[96][97][98].…”