Hemoglobin-biocatalysts synthesis of a conducting polyaniline

A new biocatalytic route for the synthesis of a water soluble and conducting complex of polyaniline (PANI)/sodium dodecylsulfate (SDS) is presented. Hemoglobin was used to catalyze the polymerization of aniline in the presence of SDS to form a PANI/SDS complex. The pH on polymerization reaction of aniline was studied. The SDS micellar-templated polymerization of aniline is strongly pH-dependent in this case. A wider range pH (1.0-4.0) is required to produce the conducting PANI and optimal pH of 2.0. UV-vis, FTIR, GPC-LS, elemental analysis, conductivity measurements, cyclic voltammetry, TGA, Fluorescence spectra and XRD studies for the characters of PANI/SDS complex indicate the presence of a thermally stable, reversible electrochemical active form and fluorescence property of PANI. (c) 2005 Elsevier B.V. All rights reserved.