BPDT-TTF

Similar examinations of the CT spectra for bis(propylenedithio)-tetrathiafulvalene (BPDT-TTF) salts [36], BEDT-TTF salts [37], and bis-tetramethylenetetraselenafulvalene-(4,5-dimercapto-l,3-dithiole-2-thione)nickel [OMTSF-Ni(DMIT)2] salt [38] have been performed. The latter salts are examples of organic conductors that are almost isotropic in two dimensions. Thus only weak polarization dependence is found in the entire frequency range. The analysis of the spectra within a simple DA-charge oscillator model, which takes into account the coupling to intramolecular vibrational modes, demonstrates how IR and optical measurements can provide estimates for a number of physical parameters for lowdimensional organic conductors. 

EDT-TTF = ethylenedithiotetrathiafulvalene. CTBT-TTF = tetrabenzylthiotetrathiafulvalene. BPDT-TSF = bis(propylenedithio)tetraselenafulvalene. eOMTSF = bis(tetramethylene)tetraselenafulvalene. 

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