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Electrochemistry and Ion Sensing Properties of Conducting Hydrogel Layers Based on Polypyrrole and Alkoxysulfonated Poly(3,4‐ethylenedioxythiophene) (PEDOT‐S)
Author(s) -
Sobkowiak Marek,
Sokalski Tomasz,
Lewenstam Andrzej,
Gabrielsson Roger,
Inganäs Olle,
Milczarek Grzegorz
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201300487
Subject(s) - pedot:pss , poly(3,4 ethylenedioxythiophene) , conductive polymer , polypyrrole , materials science , oxidizing agent , polymerization , aqueous solution , electrochemistry , electrode , potentiometric titration , chemical engineering , polymer , polymer chemistry , inorganic chemistry , chemistry , organic chemistry , composite material , engineering
Acidic aqueous solutions containing pyrrole and alkoxysulfonated PEDOT derivative (PEDOT‐S) were found to undergo polymerization in the absence of an external oxidizing agent. The product was a nearly black‐colored conducting hydrogel that after separation could be dispersed in water or acetone. The suspensions could be used to deposit cast films on a polycrystalline gold electrode. The polymer modified electrode showed a nearly Nernstian potentiometric response to Ag + cations in the concentration range of 10 −5 –10 −1 M with the slope of 54 mV/decade. The response was specific to Ag + compared to a series of alkali and transition‐metal cations (p K Ag/M >3.7).