Abstract
AbstractConjugated oligomers based on a combination of thiophene and 3,4‐dialkoxythiophene moieties have been synthesized via the Vilsmeier formylation, Wittig‐Honer reaction, and McMurry coupling reaction starting from dimethyl 3,4‐dihydroxythiophene‐2,5‐dicarboxylates. Comparison of the optical and electrochemical properties shows that the mixed π‐conjugated oligomers of thiophene and 3,4‐dialkoxythiophene produces a decrease of the highest occupied molecular orbital‐lowest unoccupied molecular orbital gap that is attributed to the electron‐donating property of the alkoxy groups. © 2001 John Wiley & Sons, Inc. Heteroatom Chem 12:414–417, 2001
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