Photoelectron spectra of AsF5-doped polyacetylenes

Abstract

The x-ray and ultraviolet photoemission spectra of undoped polyacetylene, AsF5-doped polyacetylene, AsF5, and AsF3 are reported and compared. At a doping level near where the electrical conductivity saturates (∼11% AsF5), the As:F ratio is 1:5 and a large fraction of the arsenic–fluoride moieties are localized near the surface of the polyacetylene fibrils. The C (1s) core-level spectra indicate a charge transfer of about one electron per AsF5 molecule. The UPS spectra, the x-ray induced Auger spectra and CNDO calculations suggest, however, that the arsenic pentafluoride moieties are not simple AsF5-radical anions. At lower doping levels (0.1 to 1%) very different results are obtained.