Effect of organic vapors on the molecular conformation of non-doped polyaniline
W Zheng, Y Min, AG MacDiarmid, M Angelopoulos… - Synthetic metals, 1997 - Elsevier
A series of studies have been carried out on polyaniline (emeraldine base; EB) thin films
deposited on glass substrates from aqueous solutions of polymerizing aniline (“in-situ” EB-I
film). These films exhibit a Vis/UV spectrum in which the exciton peak has an absorption
maximum at~ 600 nm. Exposure of EB-I film to NMP vapor results in a red-shift of the exciton
peak to~ 650 nm (EB-II film). Doping of EB-II film by aq. HCl vapor gives a more delocalized
electronic structure and higher electrical conductivity than those of the doped EB-I film. It is …
deposited on glass substrates from aqueous solutions of polymerizing aniline (“in-situ” EB-I
film). These films exhibit a Vis/UV spectrum in which the exciton peak has an absorption
maximum at~ 600 nm. Exposure of EB-I film to NMP vapor results in a red-shift of the exciton
peak to~ 650 nm (EB-II film). Doping of EB-II film by aq. HCl vapor gives a more delocalized
electronic structure and higher electrical conductivity than those of the doped EB-I film. It is …