Abstract
The resonance Raman scattering spectra of UO2L2 (L = NO3, CH3COO or Cl) type uranyl compounds in dimethyl sulfoxide ((CH3)2SO) have been measured under laser excitation of the UO22+ ion in resonance with the 1Σg+ -->1Φg Laport-forbidden f-f electronic transition. The resonance Raman excitation profiles of the totally symmetric stretching vibrational mode of uranyl are presented and analyzed in terms of transform theory within the non-Condon model It is found that, in the 1Σ+g -->1Φg electronic transition, elongation of the U-O equilibrium bond length is related to the magnitude of the change in the excitation profile and has a linear correlation with the increase in the charge transferred from the ligand to the uranium atom.
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