Preparation of poly-(dicarbon monofluoride), (C 2F) n from exfoliated graphite

Abstract

New compound Poly-(dicarbon monofluoride), (C 2F) n was prepared at low temperatures of 335 to 374°C with faster reaction rate from exfoliated graphite than from natural graphite. The fluorination reaction was not controlled by the diffusion of fluorine into graphite layers, but by the reaction of fluorine with graphite, and the activation energy of the reaction was 35.6 Kcal/mol. The product has the interlayer spacing (d 001) of 8.8 to 9 Å, half width (β 001) of 2.7 to 2.9° and F/C ratio of 0.535 to 0.610. The difference in the reaction rates of exfoliated and natural graphites with fluorine was based on the structure of the starting materials.