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Resonance Raman scattering and vibronic coupling in aquo‐ and cyano‐cobalamin
Author(s) -
Galluzzi F.,
Garozzo M.,
Ricci F. F.
Publication year - 1974
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250020405
Subject(s) - vibronic coupling , raman spectroscopy , chemistry , resonance (particle physics) , excitation , raman scattering , vibronic spectroscopy , corrin , ground state , molecular physics , harmonic oscillator , atomic physics , ring (chemistry) , physics , molecule , optics , quantum mechanics , organic chemistry
The resonance Raman spectra of cyano‐and aquocobalamin have been obtained from aqueous solutions. In order to check the vibronic theory of Raman intensity in the rigorous resonance case, the excitation profile of the 1502 cm −1 vibration was measured and analyzed using a model of two displaced harmonic oscillators for the ground and the resonant electronic state. A very good agreement is shown between the calculated and the experimental values of both the excitation profile and the absorption spectrum. Information on the corrin ring symmetry and evaluation of the vibronic interaction energies have been obtained. The appearance of several overtones and combinations is also reported.