Pulsed Microwave Characterization of Conducting Polymers.
Final rept. 1 Jun 82-31 May 85,
UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF CHEMISTRY
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Extensively delocalized Pi-electrons in high approximately solitonic symmetry polymers have been shown in preliminary studies to have a profound effect upon electrical conductivity, nonlinear optical properties, solubility, solution order, and solid state structure. In addition to a variety of polyacetylene polymers and copolymers, we have synthesized a number of new, high symmetry ladder polymers. The intrinsic, delocalized Pi-electron defect has been characterized by ENDOR and ESE spectroscopic techniques variable temperature and frequency studies have permitted definition of the time-independent wavefunction of the defect and of both one and three dimensional dynamics. For ladder polymers, ENDOR and ESEEM studies have established the existence and permitted the characterization of stable, reversible charge transfer complexes formed between polymers and dopants such complexes are shown to change Pi-delocalization and alter polymer solubility. Spectroscopic measurements of delocalization and of both intra- and intermolecular charge transfer have been correlated with electrical conductivity. Soliton dynamics are defined in terms of phonon-driven and activated processes.
- Atomic and Molecular Physics and Spectroscopy
- Solid State Physics