Resonance Raman scattering of Peierls-Hubbard dimers in tetrathiofulvalene (TTF) salts

Raman investigations of Peierls-Hubbard (TTF+)2 dimers in (TTF)2Mo6O19 and (TTF)2W6O19 salts have been performed. It was found, that the resonance enhancement of Raman intensity of intramolecular vibration modes exists only when the frequency of exciting light fits to the localized electron transition, however, the resonance enhancement of intermolecular modes occurs when the frequency of exciting light corresponds to the charge transfer transition.© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.