Two donor-acceptor-type conjugated polymers comprising alkoxy-substituted bithiophenes were synthesized by both direct C-H arylation polymerization and Stille-type polycondensation. Although these polymers contain the same components, i.e. two alkoxythiophene moieties and one benzothiadiazole moiety in a repeating unit, their optical and electrochemical properties were clearly different owing to their different regioregularities.
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