Mossbauer spectra of FeCh-doped poly(phenyleneviny1ene) with composition [ C~H~( F~C~) O .~O ]~ and of '2912-doped poly(2,5-thienylenevinylene) with composition [C6H4sIO,SO]n showed FeC4-and symmetrical IS-, respectively, to constitute the dopant ions. The above doping processes are in these aspects equal to the doping processes in polyacetylene, while the corresponding processes in polyphenylene (FeCl3 doping) and polythiophene (I2 doping) show a slightly different behavior.
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