BENI, Alessandra; CARBONERA, Chiara; DEI, Andrea; LÉTARD, Jean-François; RIGHINI, Roberto; SANGREGORIO, Claudio; SORACE, Lorenzo

doi:10.1590/S0103-50532006000800007

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BENI, Alessandra
Dipartimento di Chimica

CARBONERA, Chiara
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

DEI, Andrea
Dipartimento di Chimica

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Journal of the Brazilian Chemical Society. 2006, vol. 17, n° 8, p. 1522-1533

Sociedade Brasileira de Química, SBQ

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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.< Leer menos

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Cobalt

Valence tautomerism

Redox properties

Isomerism

Photochromism

Photoinduction

Photomagnetism

Semiquinone

Radical ligand

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Optical induced valence tautomeric interconversion in cobalt dioxolene complexes

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