Acta Phys. -Chim. Sin. ›› 1986, Vol. 2 ›› Issue (01): 59-62.doi: 10.3866/PKU.WHXB19860109

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EXAFS STUDY ON ELECTRICALLY CONDUCTIVE POLYMERS (Ⅱ) FeCl3-DOPED POLYTHIOPHENE

Zhao Yaqin; Lu Kunquan; Chang Longchun; Bai Chunli*; Cao Yong; Fu Heng; Tang Youqi   

  1. Institute of Physics, Academia Sinica, Beijing; Institute of Chemistry, Beijing
  • Received:1984-12-13 Revised:1985-04-17 Published:1986-02-15
  • Contact: Bai Chunli

Abstract: Fe K absorption spectra of an electrically conductive polymer——FeCl_3-doped polythiophene and model compound [N(C_2H_5)_4][FeCl_4] were measured with a laboratory EXAFS system, which utilizes a high power rotating-anode X-ray generator (Rigaku model RU-1000) as a X-ray source. The analysis of observed EXAFS data shows that Fe atom is surrounded by four Cl atoms with Fe-Cl distance of 2.19. It is concluded that the dopant exists mainly in the form of FeCl_4~-. The result provides a direct structural information that strongly supports the proposition: the doping process is as follows
2FeCl_3+e~-→FeCl_4~-+FeCl_2