ABSTRACT
This chapter considers some properties of conjugated polymers, the nature and dynamics of charge carriers, and the possible charge transfer mechanisms. It is concerned with the possibility of the investigation of fundamental properties of conjugated polymers by Electron Paramagnetic Resonance (EPR) spectroscopy and the advantages of 2-mm wave band EPR spectroscopy are demonstrated for the study of organic conjugated polymers possessing semi-conductive properties, namely organic polymer semiconductors (OPS). Polyacetylene is the simplest conjugated polymer. Indeed, the spectra of both model and modified polymer systems are expected to be more informative at 2-mm wave band EPR. The Polyaniline family is known for its remarkable insulator-to-conductor transition as a function of protonation or oxidation level. This polymer differs from other conjugated ones in several important aspects. The data obtained by investigating conjugated polymers demonstrate the advantages of 2-mm wave band EPR in the determination of fine peculiarities of molecular and electron dynamics promoting more complete understanding of the processes occurring in these compounds.
