Intramolecular spin interaction of 1,3-phenylene linked polyradicals bearing nitroxides in the π-conjugated polymeric main and side chains

Stable 1,3-phenylene linked polyradicals bearing nitroxides in the π-conjugated main and side chains were synthesized and the intramolecular spin interaction was investigated. The S values numerically calculated based on the degree of polymerization and the spin concentration of polyradicals was in good agreement with the experimental values. This showed that the spin defect intercepts the intramolecular spin interaction in the polyradicals bearing nitroxides only in the π-conjugated main chain, whereas, in the polyradical bearing another nitroxide in the side chain, there is the intramolecular spin interaction across the spin defect.

Stable 1,3-phenylene linked polyradicals bearing nitroxides in the π-conjugated main and side chains were synthesized and the intramolecular spin interaction was investigated. The S values numerically calculated based on the degree of polymerization and the spin concentration of polyradicals were in good agreement with the experimental values. This showed that the spin defect intercepts the intramolecular spin interaction in the polyradicals bearing nitroxides only in the π-conjugated main chain, whereas, in the polyradical bearing another nitroxide in the side chain, there is the intramolecular spin interaction across the spin defect.Figure optionsDownload as PowerPoint slide