Uv-Vis./NIR and transport studies of chemically synthesized soluble polypyrrole

E. J. Oh, K. S. Jang, J. S. Suh, H. Kim, K. H. Kim, C. H. Yo, J. Joo

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22 Citations (Scopus)


Doped polypyrrole which is soluble in various organic solvents (m-cresol, chloroform, DMSO, NMP etc.) is synthesized. Homogeneous solutions prepared from the solvents show different behaviors at near IR region depending on the solvent used. The results may be explained by PPy conformation change depending on polarity and aromatic interaction of solvents and dopants. Amorphous X-ray diffraction pattern is observed in flexible free standing films cast from these solutions. The electrical conductivity of the materials is 10-2 ≃ 100S/cm at room temperature. Temperature dependence of dc conductivity (δdc) indicates that these materials show the three dimensional variable range hopping (VRH) model and show the relatively strong localization of charge. From the EPR experiment of PPy-NSA (m-cresol) sample, the density of state of the system is estimated as ≃0.06 states/eV ring.

Original languageEnglish
Pages (from-to)147-148
Number of pages2
JournalSynthetic Metals
Issue number1-3
Publication statusPublished - 1997 Jan

Bibliographical note

Funding Information:
This work was supportedb y Basic Science Research Grant (BSRI-96-3424) of the ministry of Education, Korea and Korea Sciencea nd EngineeringF oundations(K OSEF).


  • Conductivity
  • Polypyrrole and derivatives
  • Solution processing
  • Transport measurements
  • UV-Vis-NIR absorption

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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