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Data from: Turbo Grignard-mediated distannylation of ester-functionalized quinoid heterocycles for narrow-bandgap polymer acceptors

Dong, Shilong1; Zhang, Yi2

Published Sep 04, 2026 on Dryad. https://doi.org/10.5061/dryad.dncjsxmfr

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Sep 04, 2026 version files 5.74 MB

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Abstract

Conventional lithiation of ester-substituted quinoid fluorinated thieno[3,4-b]thiophenes (FTT) induces irreversible carbonyl degradation. We report a kinetically controlled i-PrMgCl·LiCl-mediated halogen–magnesium exchange that bypasses this limitation, enabling gram-scale synthesis of pure distannylated monomers. Stille polycondensation affords PY-FTT, a quinoid-enhanced polymer acceptor. All-polymer solar cells utilizing PY-FTT deliver an outstanding 12.4% power conversion efficiency. This mild stannylation protocol provides a robust paradigm for advanced narrow-bandgap conjugated materials.