Mc. Bernard et al., SPECTROELECTROCHEMICAL CHARACTERIZATION (OMA AND RAMAN) OF SULFONIC-ACIDS DOPED POLYANILINES, Synthetic metals, 84(1-3), 1997, pp. 785-786
Polyaniline films doped with camphorsulfonic acid (PANI-CSA) were prep
ared by electropolymerization and characterized by in situ Raman spect
roscopy. Optical Multichannel Analysis (OMA) was used to characterize
the changes of optical properties of PANI-CSA during the cycling in an
electrochromic cell. The properties of PANI-CSA colored in 1 M HCSA w
ere compared with those of PANI-CSA and PANI colored in 1M HCl. The st
riking fact is the increase of the polaron band (isolated polaron at 2
.95 eV) during the coloration of PANI-CSA in HCSA. Secondary doping of
these films after dissolution in m-cresol can be obtained.