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Interprétation des Profils d'Excitation Obtenus par Raman de Résonance des Modes de Vibration de la Diéthylcyanine
Author(s) -
Rayez J. C.,
Forel M. T.,
Mejean T.
Publication year - 1980
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.1250090211
Subject(s) - excitation , raman spectroscopy , raman scattering , atomic physics , vibration , polarization (electrochemistry) , spectral line , physics , chemistry , nuclear magnetic resonance , molecular physics , optics , quantum mechanics , astronomy
The excitation profiles of several vibrational Raman bands of diethylcyanine are examined where the exictation is applied to the first electronic transition. In order to analyse these profiles, firstly, a study of the electronic spectrum is carried out: the symmetry of the first electronic state is determined from an experimental approach (polarization of vibrational and electronic spectra) and from a theoretical approach (Hartree‐Fock semiempirical calculations); secondly, the vibration excitation profile located at 1368 cm −1 is analysed. The parameters of this vibration (1368 cm −1 ) and the mechanism of the scattering are obtained with the help of Raman and absorption spectra. A comparison between the scattered intensity and the 1368 cm −1 vibration intensity allows the studies of excitation profiles of the other vibrations.