Polyaniline intercalated into zeolites, zirconium phosphate and zirconium arsenate

Abstract

AbstractAniline (or aniline hydrochloride) was intercalated into zeolite, zirconium phosphate and zirconium arsenate (proton form and sodium form) and subsequently oxidized to polyaniline (PAN) by ammonium peroxodisulphate. The structure of PAN in the host was studied by electron paramagnetic resonance spectroscopy. PAN in the host gave a free‐radical EPR signal at 2·0035‐2·0037 for the hydrogen or 2·0047‐2·0049 for the sodium form of the host, similarly to the ermeraldine salt (PAN–2S) or emeraldine base (PAN–2A) form of PAN. Saturation occurs in PAN–HZ and PAN–HS. In contrast, the intrachannel PAN in HY was unsaturated under the same conditions. Conduction in PAN–HZ and PAN–HS was predominately carried out by variable‐range hopping and tunnelling respectively, and PAN–HY showed insulating properties.