ArticleChemical science2026
Quinoid-controlled bond-length alternation enables high-mobility non-fused π-conjugated polymers.
Article in Chemical science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Achieving high charge-carrier mobility in π-conjugated polymers typically requires the incorporation of fused-ring frameworks that ensure backbone planarity and rigidity (intrachain transport) and π-π stacking (interchain transport). Here we show that high mobility can instead arise from efficient intrachain transport even in fully non-fused polymer backbones through precise control of quinoid resonance and bond-length alternation (BLA). A series of S-Pechmann (SP)-based polymers having alkoxy side chains were designed in which the quinoidal character was systematically tuned by varying the length of the oligothiophene co-units. Increasing quinoidal character markedly suppresses BLA along the polymer backbone, leading to pronounced π-electron delocalization and reduced carrier effective masses as low as ∼0.05
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