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).
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