THE ELECTROCHEMICAL PREPARATION OF POLYPHENOL WITH CONDUCTIBILITY

摘要

Polyphenol film deposited on platinum foil can continuously grow with time during the electrolysis of a phenolsolution consisting of 0.1 mol L-1 phenol, 3 mol L-1 NaOH and 0.5 mol L-1 Na2SO4, as has been proved by the methods ofsweep potential, constant potential and constant current, and visible spectra during the electrolysis of phenol. A polyphenolfilm with thickness of0.11 mm was obtained by the electrolysis of phenol at a constant potential of 0.70 V (versus Ag/AgC1with saturated KC1 solution). Polyphenol film is inactive and stable in 2 mol L-1 H2SO4 solution, neutral solution and3 mol L-1 NaOH solution and in the potential range between -0.95 and 1.35 V. The usable potential range is dependent onthe pH value. Polyphenol has an ESR signal with a g factor of 2.0049. The conductivity ofpolyphenol is 1.2 x 10-4 Scm-1. Inthe solution of polyphenol dissolved in DMSO, the mobility ofpolyphenol anions is 8 x 10-9 m2 s-1 V-1 at 20℃.