Syntheses and ESR characterizations of conjugated polymers with nitrogen atoms

We present syntheses and properties of several kinds of polyaniline and polyaminopyridine derivatives. Polyaniline derivative with a stable radical group (PDDBO) and iodine-doped (doped-PmAPY) or oxidized polyaminopyridine PmAPYO) showed one or two “half-field” ESR signals due to Δms = ±2, in addition to a signal at central resonance field. For these polymers was strongly suggested a possibility of spin multiplet state including triplet one.