TY - JOUR
T1 - Electrochemical process of formation of an insulating polypyrrole film
AU - Osaka, Tetsuya
AU - Momma, Toshiyuki
AU - Komaba, Shin ichi
AU - Kanagawa, Himeko
AU - Nakamura, Sadako
N1 - Funding Information:
This work was supportedf inancially by the Grant-in-Aid for Scientific Research on Priority Areas, the Ministry of Education, Sciencea nd Culture.
PY - 1994/7/8
Y1 - 1994/7/8
N2 - Insulating and electroinactive polypyrrole (PPy(NaOH)) film can be synthesized by electropolymerization from an NAOH aqueous solution containing pyrrole at a highly positive potential. The synthesis of this electroinactive PPy(NaOH) was investigated using in situ UV and X-ray photoelectron spectroscopy, and was compared with the irreversible oxidation ("overoxidation") of electroactive PPy under a highly positive potential. Overoxidation made the PPy inactive. However, the formation of PPy (NaOH) started above 0.5 V vs. Ag/AgCl, and the "overoxidation" began simultaneously in the polymerizing solution. Overoxidation with nucleophilic hydroxide ions caused a structural change in the PPy molecule, which destroyed the original π-conjugated system.
AB - Insulating and electroinactive polypyrrole (PPy(NaOH)) film can be synthesized by electropolymerization from an NAOH aqueous solution containing pyrrole at a highly positive potential. The synthesis of this electroinactive PPy(NaOH) was investigated using in situ UV and X-ray photoelectron spectroscopy, and was compared with the irreversible oxidation ("overoxidation") of electroactive PPy under a highly positive potential. Overoxidation made the PPy inactive. However, the formation of PPy (NaOH) started above 0.5 V vs. Ag/AgCl, and the "overoxidation" began simultaneously in the polymerizing solution. Overoxidation with nucleophilic hydroxide ions caused a structural change in the PPy molecule, which destroyed the original π-conjugated system.
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U2 - 10.1016/0022-0728(94)03298-X
DO - 10.1016/0022-0728(94)03298-X
M3 - Article
AN - SCOPUS:0001410958
SN - 0022-0728
VL - 372
SP - 201
EP - 207
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 1-2
ER -