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Title: Oxidation-Reduction Interactions between Electroactive Polymer Thin Films and Au(III) Ions in Acid Solutions
Authors: Neoh, K.G. 
Young, T.T.
Looi, N.T.
Kang, E.T. 
Tan, K.L. 
Issue Date: Dec-1997
Source: Neoh, K.G.,Young, T.T.,Looi, N.T.,Kang, E.T.,Tan, K.L. (1997-12). Oxidation-Reduction Interactions between Electroactive Polymer Thin Films and Au(III) Ions in Acid Solutions. Chemistry of Materials 9 (12) : 2906-2912. ScholarBank@NUS Repository.
Abstract: Polyaniline (PAN) and polypyrrole (PPY) were coated on pristine and acrylic acid graft copolymerized low-density polyethylene (LDPE) films and exposed to chloroauric acid solutions. The reduction of Au(III) ions in solution was followed using ultraviolet-visible absorption spectroscopy. The structures of the PAN and PPY films after varying periods of immersion in the chloroauric acid solutions were analyzed using ultraviolet-visible absorption spectroscopy and X-ray photoelectron spectroscopy (XPS). In the process of reducing Au(III) to Au(0), the electroactive polymers underwent degradation, evidenced by a gradual decrease in electrical conductivity, ring substitution by chlorine, and a loss of material into solution. The degradation is due to the higher propensity of the polymers when existing in a higher oxidation state to undergo hydrolysis reactions to soluble products.
Source Title: Chemistry of Materials
ISSN: 08974756
Appears in Collections:Staff Publications

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