We describe a one-step synthesis of oligoanilines having pre-selected molecular weight, such as, aniline hexamer, octamer, dodecamer, hexadecamer, etc., by chemical oxidative coupling of N-phenyl-p-phenylenediamine (4-ADPA, or aniline dimer) in dilute aqueous acids (HCl, CSA) using ammonium peroxydisulfate as the oxidant. Oligoaniline films show robust, reversible chemiresistor response when exposed to volatile organic compounds (VOCs) and are particularly effective in detecting nerve agent stimulants DMMP and DIMP at room temperature in ambient air.

Nerve agent simulant sensors using oligoanilines synthesized directly from aniline dimer

243rd National Meeting (2012)

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