Resonance Raman Intensity Analysis of Vibrational and Solvent Reorganization in Photoinduced Charge Transfer

Quantitative analysis of resonance Raman scattering cross sections, together with charge-transfer absorption and emission spectra, can provide detailed information about the changes in nuclear equilibrium geometry undergone by both the electron donor and acceptor and the surrounding solvent in photoinduced charge-transfer processes. The molecular parameters that determine absorption and fluorescence band shapes and resonance Raman cross sections are summarized, and methods for extracting those parameters through spectral modeling are reviewed with emphasis on charge-transfer systems. Applications to the determination of molecular and solvent reorganization parameters to several organic intra- and intermolecular charge-transfer transitions are then presented, and prospects for further development of the technique are discussed.