The study of electrical and magnetic properties of LiPF6 doped polyaniline

J. Joo, H. G. Song, C. K. Jeong, J. S. Baeck, J. K. Lee, K. S. Ryu

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20 Citations (Scopus)


The results of temperature dependent dc conductivity, EPR magnetic susceptibility, and X-ray photoelectron spectroscopy experiments (XPS) are reported for polyaniline (PAN) doped with lithium hexafluorophosphate (LiPF6), PAN-LiPF6. DC conductivity (σdc) and its temperature dependence of PAN-LiPF6 samples vary with the average molecular weight (Mw) of polyaniline used and the composition of doping solution. The EPR linewidth and Pauli susceptibility (XP) depend on the Mw of PAN used. The σdc and the XP of the intermediate Mw PAN-LiPF6 samples are higher than those of the low Mw PAN samples, indicating more highly conducting state of the intermediate Mw PAN samples. Based on the results of XPS and EPR experiments, some portions of quinoid rings in emeraldine base form of PAN are transformed into benzenoid rings through LiPF6 doping process, indicating the formation of polarons. However, the existence of some portions of quinoid rings in PAN-LiPF6 samples after doping suggests an inhomogeneous doping or a pseudo doping.

Original languageEnglish
Pages (from-to)215-220
Number of pages6
JournalSynthetic Metals
Issue number3
Publication statusPublished - 1999 Jan 1

Bibliographical note

Funding Information:
This work was supported in part by Basic Science Research Grant (BSRI-97-2444) of the Ministry of Education, Korea, Advanced Materials Chemistry Research Center in Korea University (Korea Research Foundation, 96-05-D-1134), and the CRM-KOSEF (1998).


  • Electrical and magnetic properties
  • LiPF
  • Polyaniline

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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