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We report a new series of low band gap (LBG) polymers (P1-P4), in which para or meta- alkoxyphenylthiophene (APTh) substituted benzodithiophene and 2,5-ethylhexyl-3,6-bis(5-bromothiophen-2-yl)pyrrolo[3,4-c]-pyrrole-1,4-dione or 2-ethylhexyl-4,6-dibromo-3-fluorothieno[3,4-b]thiophene-2-carboxylate are key repeating units. All the polymers showed broad absorption profiles over 900 nm with reduced optical...
In order to establish the correlation between intramolecular non-covalent interactions in the polymer backbone and the position/nature of alkoxy side chains in electron rich unit, two new series of low band gap polymers (P1–P4; P5–P8) were synthesized. We observed significant changes in photophysical properties upon changing the position and nature of the alkoxy side chain with respect to their intramolecular...
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