Resonant Raman spectra of soluble trans polyacetylene

Resonant Raman spectra of a soluble form of trans polyacetylene are here reported. Accurate excitation profiles have been obtained by using the 1196 and the 1370 cm-1 bands of toluene as an internal standard. Both the integrated and sliced excitation profiles exhibit a resolved vibronic structure, whose shape is interpreted in terms of the magnitude of the electron-phonon coupling and of the inhomogenous distribution of the electronic energies due to the interaction with the solvent. The present data are compared with those obtained from solid samples.