The Chemical and Physical Properties of Pyrrole-Based Conducting Polymers: The Oxidation of Neutral Polypyrrole.
IBM RESEARCH LAB SAN JOSE CA
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A series of experiments on the physics and chemistry of polymers derived from pyrroles, show that the oxidation of neutral insulating polypyrrole PPo to its conducting counterpart PP is a multistep process. In particular, the conductivity of the polymers increases only in the early stages of oxidation whereas significant changes in the optical and EPR properties occur in later stages of the oxidation when no further changes in the conductivity take place. The arly stages of oxidation lead to an ionic PP anion polymer and the later stages of oxidation result in chemistry at the nitrogen atoms of the pyrrole rings. Similar behavior is observed for all the oxidized pyrrole polymers independent of the method of oxidation. Author
- Physical Chemistry
- Polymer Chemistry