Figure 1.
(a) Optical absorbance spectra of 0.02 M of [Fe(CN)6]3− and 0.02 M of [Fe(CN)6]4−. The vertical line indicates the absorption maximum at 420 nm; (b) Optical absorbance spectra of Ppy synthesized under different conditions: (1) polymerization solution containing 0.5 M of pyrrole and 0.04 M of [Fe(CN)6]3−, spectrum was registered after 24 h from the initialization of the polymerization reaction, (2) supernatant collected after 24 h of polymerization followed by centrifugation at 12,000 g for 10 min, (3) 0.375 M of pyrrole and 0.1 M of [Fe(CN)6]3− spectrum registered after 24 h of polymerization, (4) 1.5 M of pyrrole and 0.25 M of [Fe(CN)6]3− spectrum registered after 24 h of polymerization. All spectra were registered in a 0.1 M PBS, pH 7.0. The vertical line indicates poorly expressed absorption maximum at 460 nm.