Copolymers cyclic voltammograms

The determination of the type of copolymers formed in the preparation process is an important characterization step. One method of characterization is cyclic voltammetry as shown, e.g., by Yohannes et Cyclic voltammograms of copolymerization of pyrrole and bithiophene is shown in Figure 11.30. 

Figure 29. Cyclic voltammograms of the H 2 redox region under dry and humidified (N2 saturated at room temperature, Ph2o = 4 kPa) conditions. A 5% mole MJPn mixture was fed at the counter electrode. MEA with copolymer II o(Fig. 10) and active area of 25 cm. Scan rate 50 mV/s, T = IdOTJ.

In order to complete the electrochemical investigations, the redox properties of the copolymers were also studied." The cyclic voltammogram of polymer 19a, containing aromatic ether and thioether bridges was examined. Figure 15 shows the CV obtained at -30°C using a scan rate of 1 V/s. The pc Epa, and E1/2 for this polymer were calculated to be 1.23, 0.955, and -1.09X respectively. 

Calcium Ion Sensor. Cyclic voltammograms (CV) of ferrocyanide/ferricyanide redox couple with the modified electrode were measured. The peak currents due to the reversible electrode reaction of a Fe(CN) /Fe(CN) system on a bare Pt electrode were almost completely suppressed by the coating witti the polyvinyl-polypeptide block copolymer. This indicates that the electrode was covered with the hydrophobic polymer and was insulated from redox active species. 

Fig. 10 Cyclic voltammogram of poly(ferrocenylsilane)-f>-poly(cobaltoceniumethylene) (a) and the corresponding structures of the diblock copolymer (b) (reprinted with permission from [181]. Copyright 2011 Wiley)...

Fig. 32 Preparation pathway (top) for electroactive tubuli (TEM image bottom left), generated upon crosslinking of the shell. The polyferrocenylsilane is located along the inner wall, preventing electrode adsorption. Cyclic voltammograms are shown on the bottom right-, top CV crosslinked tubuli bottom CV diblock copolymer in common solvent, indicating adsorption processes (reprinted with permission from [166]. Copyright 2004 Wiley)...

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