Abstract

Electron Nuclear Double Resonance (ENDOR) and Electron Spin Echo (ESE) techniques have been applied to the investigation of several coals. The results of these measurements are compared with analogous studies of pristine polyacetylene, composites of polyacetylene/polyethylene, and of a variety of hydrocarbon radicals. This comparison of ENDOR and ESE results provides insight into paramagnetic electron delocalization and into electron Heisenberg spin exchange interactions existing in coals.

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