New β-linked pyrrole monomers:: approaches to highly stable and conductive electrochromic polymers

An efficient synthetic route to beta-linked dipyrrole monomers has been developed. Electrochemical polymerization of these monomers leads to the incorporation of polycyclic aromatic residues into a polymer backbone. The resulting conjugated polymer films are electroactive, robust electrochromic materials that are highly delocalized in their oxidized forms. (C) 2004 Elsevier Ltd. All rights reserved.