For the creation of a purely organic ferromagnet, π-conjugated polyradicals satisfying nonKekulé and non-disjoint structure have been synthesized. In this report, the triaminotriphenylene derivative 2 and the tribromotriphenylene derivative 3 were synthesized from 2-methoxyphenol via 5 and 6 steps. High molecular weight aromatic polyamines 4 were prepared by palladium-catalyzed polycondensation. Polycondensation conditions, such as catalytic ligand, solvent, base, and feed ratio of the comonomers were optimized. The polyamines 4 were oxidized to the corresponding poly(aminium cationic radicals 1. ESR and UV-vis spectrum indicated a N-centered radical generation. Magnetic properties of polyradicals 1 were examined by SQUID measurement, which displayed a chemical stability and an intramolecular ferromagnetic interaction of the polyradical.
|ホスト出版物のタイトル||Polymer Preprints, Japan|
|出版ステータス||Published - 2005|
|イベント||54th SPSJ Symposium on Macromolecules - Yamagata|
継続期間: 2005 9月 20 → 2005 9月 22
|Other||54th SPSJ Symposium on Macromolecules|
|Period||05/9/20 → 05/9/22|
ASJC Scopus subject areas