Synthesis and Spectroscopic Properties of Conducting Polymer Polyaniline (ES)

Abstract

Polyaniline (PANI) was synthesized in Emaraldine salt  form by the chemical oxidation method by using Ammonium persulfate (APS) as an oxidizing factor. The XRD pattern refer to that PANI is an amorphous nature with  d-spacing 4.34 Ǻ. The FE-SEM images show that the  thin film of  polyaniline at 500nm shows  that is highly micro-porous. Similarly, the UV-Visible spectra of this polymer refer to two absorption peak at around 426nm and 805nm. These absorption bands are attributed to the transitions phase of π → π* and Benzenoid to Quinoid respectively. The FT-IR spectrum of  PANI shows strong bands  representing the surface bondings of  PANI and their vibration modes were also observed.  PL  photo-luminescent spectra of conducting  Polyaniline (ES) , one peak shows a broad spectrum with a maximum intensity at around 537nm, and the band gap energy at 2.3ev corresponds to the emission of polyaniline at solid state.

Keywords: Polyaniline (PANI-ES), XRD, FE-SEM, FTIR, UV, PL.