New Functions and their Applications of Carbon-Fluorine Bond

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1.Synthesis and electrochemical properties of vanadium oxide fluoride-graphite intercalation compounds (GICs)Vanadium oxide fluoride-GICs were prepared at 130ﾟC from V_2O_5, F_2 and graphite. IR,XPS and X-ray diffraction measurements revealed that the GICs were stage 2 C_* (VOF_3) F containing excess oxygens. Chronopotentiometry and impedance measurements showed that diffusion coefficients and electrical conductivities of C_<17.7> (VOF_3) F and C_<20.4> (VOF_3) F were 3.8*10^<-10>cm^2s^<-1>,9.3*10^<-7> Scm^<-1> and 4.5*10^<-10> cm^2s-1,2.7*10^<-7> Scm^<-1>, respectively.2.Synthesis of fluorine-graphite intercalation compounds using high oxidation state transition metal fluorides as catalysts.The fluorine-graphite intercalation compounds were synthesized at room temperature and -80ﾟC using AgF_3 or NiF_3 as a catalyst. The products were a mixture of stage 1+2 to stage 4 compounds with compositions, C_4F-C_<15>F.Main products were mixtures of stage 2 and 3 with compositions, C_9F-C_<10>F.Stage 1 phase with pyrolytic graphite sheet showed a large c-axis repeat distance, 1.03 nm, indicating the formation of biintercalation phase consisting of semi-ionic and nearly ionic fluorines.3.Electrochemical properties of carbon-fluorine compositeElectrochemical measurements in sulfuric acid and sodium chloride solutions showed that the corrosion was much less in carbon-fluorine compsite than in pure nickel. Monobromobenzene suspended in aqueous solution was selectively reduced at carbon-fluorine composite electrode.