Description:
<jats:title>Abstract</jats:title><jats:p>Two donor/acceptor/donor‐type pyrrole‐incorporated monomers, 4,7‐di(1<jats:italic>H</jats:italic>‐pyrrol‐2‐yl)benzo[c][1,2,5]thiadiazole (<jats:bold>M1</jats:bold>) and 4,7‐di(1<jats:italic>H</jats:italic>‐pyrrol‐2‐yl)benzo[c][1,2,5]selenadiazole (<jats:bold>M2</jats:bold>), were synthesized and polymerized electrochemically. The resulting polymers (<jats:bold>P1</jats:bold> and <jats:bold>P2</jats:bold>) were investigated in terms of their electrochromic and optical properties. Spectroelectrochemistry studies revealed that both polymers show two distinct absorptions in both red and blue regions. The absorptions at around 400 and 700 nm correspond to neutral‐state green polymers <jats:bold>P1</jats:bold> and <jats:bold>P2,</jats:bold> which is a unique property for conjugated polymers. Optical band gaps were calculated as 1.12 and 1.08 eV for <jats:bold>P1</jats:bold> and <jats:bold>P2</jats:bold>, respectively.
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