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The resonance Raman spectra of tetracyanoquinodimethane anion (TCNQ(-))and naphthalene cation (C10H8+) are analyzed in terms of theoretical model based on the Franck-Condon effects. The models include also the effect of rotation of totally symmetric normal coordinates upon electronic excitation to the resonant state (Dushinsky effects). It is shown that such a simple model accounts correctly for the available resonance Raman spectra for TCNQ(-) and C10H8+ radicals. The possible model refinements such as vibronic coupling effects are also briefly discussed.

acta physica polonica. a

Franck-Condon Effects in Resonance Raman Spectra of TCNQ-and C10H+8Radicals. A Search for Dushinsky Rotation of Totally Symmetric Modes