ArticleAngewandte Chemie (International ed. in English)2026
Dual Breaking the Geometric and Electronic Symmetry of Covalent Organic Framework for Enhanced H
Article in Angewandte Chemie (International ed. in English), 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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7 authors.
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Abstract
The efficient conversion of solar energy into chemicals is fundamentally limited by the rapid, random recombination of photogenerated charges and strong exciton binding in semiconductors. We transcend incremental catalyst optimization by introducing a universal molecular design strategy "simultaneous geometric and electronic symmetry breaking" in covalent organic frameworks that intrinsically programs directional charge flow. Our strategy of replacing symmetric benzene units with asymmetric thiophene rings induces cooperative point-group distortion and asymmetric electron density redistribution, thereby creating a built-in polarization field that slashes exciton binding energy, extends carrier lifetime by over 300%, and steers reaction selectivity. This leads to a record photocatalytic H
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