Abstract
Polyindole obtained by oxidizing coupling of indole, C 8NH 7, was studied either in the doped or the undoped state by FT i.r., Raman and electron energy loss (EEL) spectroscopies. Interpretation of the vibrational modes was facilitated by comparison of the absorption spectra of polyindole and those of related molecules acting as standards. The change from the doped to the dedoped state of polyindole is accompanied by a reordering of the Π bonds of the system characterized by the disappearance of C N bonds and the reappearance of NH bonds. Detailed analysis of the different spectral manifestations gives evidence for a monomer coupling involving the positions 2 and 3 of the carbon atoms.
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