In situ conductivity of a polythiophene from a branched alkoxy-substituted tetrathiophene. Enhancement of conductivity by conjugated cross-linking of polymer chains

摘要

Anodic coupling of 2, 3, 5-tris (4-pentoxy-2-thienyl) thiophene (an α α-coupled terthiophene thiophene branched at the central thiophene ring) produces a polyconjugated polymer with a linear structure segmented by the thiophene branches. The conductivity (15 S cm~-1), confined in a narrow potential window (0.3 V) by charge localization in tetrathiophene sequences, is strongly enhanced by occasional cross-linking in comparison with that of the polymer methyl-capped at the thiophene branches (0.02 S cm~-1).