Volume 6, Number 1, p.p. 31–36
A study of anti-Stokes resonance Raman excitation profiles for β-carotene and canthaxanthin
Gia G. Maisuradze
Department of Chemistry and Chemical Physics Program, University of Nevada, Reno, NV 89557, USA
First time on the basis of improved vibronic interaction theory, a quantitative analysis of the experimental data for the Stokes and anti-Stokes resonance Raman excitation profiles (REPs) of β-carotene and canthaxanthin was undertaken. The bandshape parameters have been employed for the calculation of the absorption spectra. The effect of inhomogenous environmental broadening of the REPs of solute molecules due to solvent-molecule interactions was investigated. The major contribution to the broadening of the REPs comes from an inhomogeneous distribution of the electronic energies. Good agreement between calculated and observed REPs and the absorption spectra was found.
Keywords: absorption spectra, benzene; improved vibronic interaction theory, Stokes Raman excitation profiles