Characterization and Vibrational Properties of Undoped and AsF5-Doped (C6H4)x

Abstract A vibrational study of poly-p-phenylene (PPP) prepared by the Kovacic method is presented. A comparison is made between the vibrational features (in both IR and Raman) of undoped PPP, PPP chemically doped using AsF5 or electrochemically doped with AsF6 −, and finally dedoped by a thermal treatment. In the last case, using the exciting wavelength ΛL = 647.1 nm, additional modes are observed in the Raman spectra (460 cm−1, 920 cm−1 and 1700 cm−1). In AsF5 doped PPP, the IR absorption spectrum reveals also new modes (1552 cm−1, 1273 cm−1 and 1184 cm−1). These features are discussed in the basis of a vibrational model.