Electrochemical synthesis of sulfonated polypyrrole in FSO₃H/acetonitrile solution

Abstract

The incorporation of SO 3Ϫ groups into a polypyrrole backbone was successfully carried out using FSO 3 H/acetonitrile medium. The degree of sulfonation (sulfonation or sulfur-to-nitrogen ratio) of polymer was controlled by varying FSO 3 H concentration while the film was being electrodeposited. The cyclic voltammograms of the electrodeposited films were taken between Ϫ1.00 and ϩ2.00 V (versus Ag/AgCl) in blank solution. A substantial effect on the electrical conductivity was observed upon the incorporation of SO 3 Ϫ groups in the polypyrrole polymeric chain.The elemental analysis results of the freshly prepared and reduced films give independent evidence that the SO 3

Electrochemical actuator based on single-layer polypyrrole film

“…The side in contact with the electrolyte was rough and compact and similar to that of the electrosynthesized PPy films reported previously (Fig. 3A) [16][17][18]. The side in contact with the electrode is porous (Fig.…”

Preparation of sulfonated overoxidized polypyrrole film applicable as an SPME tool for cationic analytes

“…When the FSO 3 H concentration is increased, the degree of sulfonation increases but the measured dry conductivity value decreases ( Table 1). The degree of sulfonation is known to be inversely related to the conductivity value [26]. The conductivity value drops considerably (to less than 10 À3 S cm À1 ) after overoxidation.…”

“…The incorporation of sulfonate groups into the polypyrrole backbone has been successfully carried out, using FSO 3 H as a sulfonation reagent in the electropolymerization solution [26].…”

“…The conductivity values decrease as the degree of sulfonation of the polymer increases. To calculate the degree of sulfonation, elemental analyses of the films were carried out and S/N ratios were calculated in detail as in previously described work [26]. Table 2 shows the amounts of Cd(II) and Ni(II) ions accumulated by the OSPPy films which were prepared from electrolysis solution containing different HSO 3 F concentrations.…”

A strategy to enhance the thermal stability of a nanostructured polypyrrole-based coating for solid phase microextraction

“…S1) [29]. It is further improved by the presence of the -SO 3 − group on the ring of pyrrole due to its strong electron withdrawing properties [30]. This acidic anionic group acts as a counter anion as well.…”