Optical induced valence tautomeric interconversion in cobalt dioxolene complexes
Language
en
Article de revue
This item was published in
Journal of the Brazilian Chemical Society. 2006, vol. 17, n° 8, p. 1522-1533
Sociedade Brasileira de Química, SBQ
English Abstract
The discovery that a number of cobalt-dioxolene complexes undergo photoswitchable behavior was reported in the recent past. This phenomenon is always associated with valence tautomeric interconversion processes involving ...Read more >
The discovery that a number of cobalt-dioxolene complexes undergo photoswitchable behavior was reported in the recent past. This phenomenon is always associated with valence tautomeric interconversion processes involving low-spin cobalt(III) and high-spin cobalt(II) species. Herein is stressed the strong formal correlation existing between these processes and the LIESST (Light-Induced Excited Spin State Trapping) effect shown by several iron(II) complexes undergoing spin crossover interconversion. The dynamics of the relaxation of the photoinduced metastable species to the ground state is discussed in terms of non-adiabatic processes within the Jortner theory of radiationless multiphonon relaxation.Read less <
English Keywords
Cobalt
Valence tautomerism
Redox properties
Isomerism
Photochromism
Photoinduction
Photomagnetism
Semiquinone
Radical ligand
Origin
Hal imported