The First Electrically Conductive Poly Heterocycle Polypyrrole

4 The First Electrically Conductive Poly(Heterocycle) Polypyrrole 

In a series of publications in 1963, Weiss et al. described the thermolysis of 2,3,4,5-tetraiodopyrrole to macromolecular networks.  

In 1968/1969 DaH Olio et al. in Parma, Italy, revitalized polypyrrole chemistry by oxidizing pyrrole itself electrolytically to pyrrole black ( noir d oxypyrrol )/° In contrast to the investigations of Weiss et al., Dall Olio and his coauthors focused on the electrochemical behavior of pyrrole and its electropolymerization. The paramagnetic behavior of the polymer was studied (the g-factor of the free radical was measured to 2.0026 by electron spin resonance spectroscopy), and a remarkable electric conductivity of 7.54 S/cm at ambient temperature was foimd. 

About 10 years later, industrial research activities at the IBM Research Laboratories (San Jose, California) again demonstrated the high conductivity of electrolytically deposited polypyrrole films. - z A period of broad investigations followed, traceable, for instance, in the first edition of the Handbook of Conducting Polymers in two polypyrrole chapters. -  

Conductive, doped polypyrrole network from tefraiodopyrrole. 

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