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Competition between dopants on redox reaction of polypyrrole
Author(s) -
Ko J. M.,
Rhee H. W.,
Kim C. Y.
Publication year - 1992
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19920530110
Subject(s) - dopant , redox , electrolyte , polypyrrole , reactivity (psychology) , aqueous solution , polymer , chemistry , half reaction , inorganic chemistry , doping , polymer chemistry , materials science , polymerization , electrode , organic chemistry , medicine , alternative medicine , optoelectronics , pathology
The surface of PPy prepared in a multiple electrolyte solution such as NaDS‐NaClO 4 in H 2 O shows a coarser structure than that of the polymer prepared in a single electrolyte system. DS − with a large aliphatic chain is used as a dopant in preparation of PPy. The dopant is trapped in PPy when the polymer is reduced in an aqueous system. A cation Na + or K + is inserted into the polymer to balance the free DS − liberated form and remained in it on reduction. PPy doped with DS − shows a high degree of redox reactivity in the system of TBADS‐AN but a poor stability in repeated redox process. The degree and rate of redox reactivity enhance when an aqueous solution of NaClO 4 is used as an electrolyte system. Both Na + and ClO 4 − take part in the redox reaction and the reduction process is intense at only one current potential.