Electronic and Vibrational Absorption Spectra of Radical Cation Salts Based on TTF Derivatives

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Abstract
Electronic and vibrational absorption spectra of radical cation salts based on TMTTP and unsymmetrical related molecules have been studied. A quantitative approach of the charge transfer absorption band has allowed the authors to propose a DRUDE-LORENTZ model to fit the experimental data. The physical meaning of the parameters associated with this fit is based upon the presence of strong electron-electron interactions in a narrow electronic band model (“extended HUBBARD model”) in agreement with the other physical properties known in these compounds.