The In Situ ESR and electrochemical behavior of poly(aniline) electrode films.

Electron-conducting organic polymers and their electronic structures are topics of considerable current interest. Electron-spin resonance should offer an important tool for probing Fermi level electrons, especially in organic materials which lack large spin-orbit interactions. Experience to date, however, with the much-studied materials poly(acetylene) and poly(pyrrole) has associated ESR with material defects. We find markedly different behavior for thin electrode films of poly(aniline) in aqueous electrolytes.