Photochemical Reduction and Oxidation of Cerium(IV) Porphyrin Sandwich Complexes

• Authors: S. Radzki , Ch. Giannotti
• Languages of publication: EN

Abstracts

EN

Irradiation of cerium(IV) complex of octaethyl bisporphyrin Ce[OEP(-2]_{2} with visible light, in the presence of CCl]_{4} as an electron acceptor, leads to their photooxidation and π cation radical formation. The process was followed using electron absorption and magnetic circular dichroism spectroscopy. Electronic configuration in neutral mono- and bisporphyrin (sandwich) complexes were compared to the one of the neutral species. Photoirradiation of sandwich octaethyl- and tetraphenyl bisporphyrins, in the presence of an electron donor (triethylamine) results in their photoreduction on different pathways. Formation of the [Ce(III)(TPP)(-2)TPP(-2)]¯ and [Ce(III)(OEP)(-1)(OEP)(-2)] complexes was followed by absorption and electron spin resonance spectroscopy.

Keywords

EN

82.50.Fv

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1996
• Volume: 90
• Issue: 2
• Pages: 385-391

Dates

published

1996-08

Contributors

author

S. Radzki

• Dept. of Chemistry, UMCS, Pl. M. Curie-Skłodowskiej 3, 20-031 Lublin, Poland

author

Ch. Giannotti

• Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette, France

Identifiers

DOI

10.12693/APhysPolA.90.385