Magnetic Resonance in Ion-Radical Organic Solids

Zoltán G. Soos and Stephen R. Bondeson
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Zoltán G. Soos: Princeton University, Department of Chemistry
Stephen R. Bondeson: Princeton University, Department of Chemistry

Chapter 4 in Extended Linear Chain Compounds, 1983, pp 193-261 from Springer

Abstract: Abstract The remarkable physical properties of ion-radical molecular solids have opened up a new area of solid-state chemistry and physics. The synthetic problem is to stabilize open-shell and mixed-valent molecular arrays while suppressing the recombination of adjacent radicals. Recent chemical studies emphasize mixed-valent systems based on π-molecular cation and anion radicals, on transition-metal complexes, on macrocyclic ligands, and on doped polymers. The subsequent characterization of conducting, semiconducting, or paramagnetic molecular solids draws on a bewildering array of conventional and novel techniques, including electron paramagnetic resonance (epr) and nuclear magnetic resonance (nmr) results discussed in this review. The problem is to determine, in the solid state, the delocalization, interactions, or relaxation of unpaired electronic moments. Solid-state models for ion-radical solids are still fragmentary but have been successfully applied in specific cases. Magnetic resonance methods have been notably useful in delineating the proper starting point for physical models.

Keywords: Configuration Interaction; Knight Shift; Organic Conductor; Triplet Exciton; Magnetic Insulator (search for similar items in EconPapers)
Date: 1983
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DOI: 10.1007/978-1-4684-4175-8_4

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