Polypyrrole materials, overoxidation resistance

Further studies by this group centered on comparisons of the overoxidation resistance limit (ORL) of polypyrrole materials doped with monoanionic borane clusters [B12H11NH3] or dianionic borane [B12H12]2 or carborane [Co(C2B9Hu)2]2-clusters. The monoanionic boron clusters were found to offer the highest stability to the PPy doped materials against overoxidation than any other charged dopant. They were also found to be far superior to the dianionic clusters in their ability to impart an ORL rise.140... 

C. Masalles, J. Flop, C. Vinas, F. Teixidor, Extraordinary overoxidation resistance increase in self-doped polypyrroles by using nonconventional low charge density anions, Advanced Materials 2002, 14, 826. 

One challenge within the area of conducting electroactive polymers such as polypyrrole (PPy) is increasing the stability of the materials. By doping PPy with [Co(C2B9Hn)2] , the material becomes more resistant to overoxidation by 300-500 mV. ... 

---