Vibrational study of the FeCl(sub-3)-doped dimer of polyaniline;a good model compound of emeraldine salt

Optical and vibrational properties of the FeCl(sub-3)-doped dimer of polyaniline, a model compound of emeraldine salt are studied. Useful information about the electronic configuration of the protonated emeraldine, which remains under debate, considering the numerous similarities between the vibrational characteristics of the polymeric chain and its well defined oligomer is presented.