ORGANIC METALS: FILMS OF AsF5 DOPED POLY-4,4′-BIPHENYLENE

Abstract

Metallic film of poly-4,4′-biphenylene is prepared by the AsF₅ oxidation and the conductivity of AsF₅ doped film is measured as a function of temperature. The maximum conductivity at 295 K of the heavily doped film becomes σ_295K ≅6 Ω⁻¹ cm⁻¹, although the conductivity for the undoped material is less than 10⁻⁴ Ω⁻¹ cm⁻¹. The film doped for one day under 300 mmHg of AsF₅ gas is metallic between 295 and 250 K.