RAMAN CHARACTERIZATION OF PARASEXIPHENYLE N-DOPED WITH SODIUM AND POTASSIUM - SOLVENT INFLUENCE AND MODELIZATION

Oligomers play a crucial role in the elucidation of the spectroscopic properties of parent infinite polymers. Thus, parasexiphenyl appears a s a model compound of poly-paraphenylene (PPP). N-doping of parasexiph enyl with various organometallic compounds effectively leads to Raman and infrared properties analogous with those observed in n-doped PPP. Although the Raman spectra of the oligomer compound have been well doc umented in the literature for THF-wet samples, little work has been de voted to the Raman study of the dry corresponding samples. THF provide s a huge dipolar effect and appears to greatly influence the vibration al properties of doped parasexiphenyl and PPP.