Abstract
Intramolecular reorganization for photo-induced electron transfers of Ru(II)-(L)M(III) 5+ (L=a bridging tetradentate ligand, and MCo or (L = a bridging tetradentate ligand, and MCo or Rh) and for formation of ligand-field (LF) excited states are investigated. Inner-sphere reorganization energies ( λ in) around the metal ions are estimated from the dependence of electron transfer rates on temperature and ΔG°. For back electron transfer processes, the magnitude of λ in around rhodium ion (0.9 eV) is close to that around the cobalt ion. Inner-sphere reorganization after LF emission of rhodium(III) ion is estimated (0.9 eV) from the Stokes shift of the emission. The magnitude of λ in or the electron transfer and the optical transition are interpreted in terms of gain or loss of the dσ ∗ electron in the metal orbital.
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