Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 13, Issue 6, Pages 1316-1323Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b301403g
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The electrochemical bandgaps for different soluble substituted polythiophenes have been measured by cyclic voltammetry. The effect of substituents on the oxidation/reduction potentials is discussed. Bandgaps obtained by cyclic voltammetry have been found to be in general higher than optical bandgaps. Among regioregular polymers substituted with a phenyl group at position 3 of the thiophene ring, examples are found that give very symmetric voltammograms. Rationalization for this behaviour is discussed from a conformational point of view.
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