Hemoglobin-biocatalysts synthesis of a conducting polyaniline

Abstract 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.