EXAFS STUDY ON ELECTRICALLY CONDUCTIVE POLYMERS(I) H2PtCl center dot 6H(2)O-DOPED POLYACETYLENE

PtL , absorption spectra of an electrically conductive polymer-H2PtCl6 center dot 6H(2)O-doped polyacetylene and the model compound K2PtCl6 were measured with a laboratory EXAFS system, which utilizes a high power rotating-anode X-ray generator (Rigaku model RU-1000) as an X-ray source. The Fourier transforms of -weighted EXAFS oscillations of sample and the model compound are shown in Fig.3. The prominent peak in the Fourier transform for H2PtCl6 center dot 6H(2)O-doped polyacetylene can he attributed to the Cl atoms surrounding Pt atom. The curve fitting analysis for the first shell shows two types of neighboring Cl atoms with Pt-Cl distances of 2.329 angstrom and 2.277 angstrom, respectively. According to the results from use of the theoretical and empirical methods, it is concluded that the dopant anion in polyacetylene film is PrCl62-. The result provides a direct structural information that the proposition, the following reaction accompanied by electron transfer from (CH) chains to platinum salts 2H(2)PtCl(6) + 2e(-)-> PtCl62- + PtCl2 + 4HCl