Electrochemical, In Situ Raman Spectroscopic, and Conductivity Studies of Polypyrrole Incorporating Large Size Anions: Conducting Nature of Reduced Form
Abstract
Polypyrrole (PPY) thin films doped with large size anions, such as tetrasulfonated metallophthalocyanines, tetrasulfornated copper porphyrin, polyvinyl sulfate, and poly(P-styrenesulfonate), have shown electrochemical activities of redox pairs in both aqueous and nonaqueous solutions at the negative potentials where the PPY is reduced to a neutral form. In situ Raman spectroscopy showed that the charge-transfer reactions of redox pairs took place at the surface of the reduced PPY thin films in the negative potential range. Cyclic voltammetric results indicated that the structurally rigid PPY films which were doped with large size anions demonstrated a considerable electrochemical conductivity when the PPY was reduced to a neutral form, although both ex situ and in situ conductivity measurements of these films indicated that the electronic conductivity of the reduced form is generally several orders of magnitude smaller than that of the oxidized form. (JG)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 21, 1990
- Accession Number
- ADA222739
Entities
People
- Amar N. Singh
- Chan S. Chan
- Hiroyasu Tachikawa
- Zhisheng Sun
Organizations
- Jackson State University