VIBRATIONAL-SPECTRA OF CHARGED DEFECTS INDUCED ON POLYMERS - POLY-P-PHENYLENE SULFIDE DOPED WITH FECL3

We present the results of a spectroscopic study carried our on films o f poly-p-phenylene sulfide (PPS) doped with FeCl3 in different solvent s. The doping and dedoping processes have been followed by electronic, infrared, and Raman spectra both in a dry atmosphere and in the prese nce of moisture. For the first time in doped PPS two strong Raman band s have been observed at frequencies close to those of the infrared-act ivated vibrational modes. Several other weaker Raman lines, originated by a breakdown of the selection rules, have been shown to be selectiv ely activated in the ionized form. These new data, when combined with the results of the infrared and electronic studies, provide a complete picture of the electronic and vibrational structure of doped PPS. Thi s allows also the assignment of those bands which are originated by ch emically modified PPS.