Depolarization Dispersion of Totally Symmetric Fundamentals in Resonance Raman Spectra. Analysis for Azobenzene Dyes

• Authors: P. Sassi , M. Pawlikowski
• Languages of publication: EN

Abstracts

EN

The resonance Raman excitation profiles and depolarization dispersions for totally symmetric vibrations are studied under the energy region corresponding to an excitation of two low-energy states of 4-nitro-4'-diethylaminoazobenzene dye. In a contrast to the earlier analysis of this dye we assume that the low-energy states of the molecule studied have different polarizations. It results in the depolarization dispersions of the Raman lines of totally symmetric vibrations. The effect is illustrated for two vibrations: ν_{4}=1342 cm^{-1} and ν_{7}=1448 cm^{-1} for which excitation profiles show distinctive intensity distribution patterns due to interferences between the vibrational manifolds of the overlapping states. The nature of the electronic (resonant) states and the magnitudes of Franck-Condon parameters determined from the experiment are also briefly discussed.

Keywords

EN

33.20.Fb

Discipline

• 33.20.Fb: Raman and Rayleigh spectra (including optical scattering)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1996
• Volume: 90
• Issue: 3
• Pages: 509-518

Dates

published

1996-09

received

1996-02-06

(unknown)

1996-05-08

Contributors

author

P. Sassi

• Department of Theoretical Chemistry, Jagiellonian University, Faculty of Chemistry, Ingardena 3, 30-060 Kraków, Poland

author

M. Pawlikowski

• Department of Theoretical Chemistry, Jagiellonian University, Faculty of Chemistry, Ingardena 3, 30-060 Kraków, Poland

Identifiers

DOI

10.12693/APhysPolA.90.509