Conducting polymers from anodic coupling of some N,N′‐bridged 2,2′‐bipyrrolyl monomers

Anodic coupling in CH3CN + 0,1 M tetraethylammonium perchlorate of some 2,2′‐bipyrrolyl monomers bridged by X groups at the N,N′‐positions (X = CHCH (1), o‐C6H4 (2) CH2 (3), (CH2)2 (4) and (CH2)3 (5)) produces conducting, α‐coupled polypyrroles (from IR spectroscopy), containing 0,25–0,30 counteranions per pyrrole ring (from elemental analysis). The in‐situ conductivity spans from values commonly found for N‐substituted polypyrroles (4 ċ 10−3 S/cm for 5) to unusually high values (2,5 S/cm for 4). A linear correlation between redox potentials and log of conductivities of the polymers evidences the influence of the polymer electronic properties of charge transport.