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<p>Homochirality, the uniformity in single molecular handedness, is a defining feature of life. Although universal in biology, the evolutionary advantage of selecting one enantiomer over its mirror image remains unresolved. One possible clue may lie in catalysis itself: recent studies demonstrate that oxygen evolution reaction (OER), a key step in photosynthesis, is sensitive to chirality. Here, we report that electrochemical OER performance with chiral additives may be correlated to the alignment of their electric (ETDM) and magnetic (MTDM) transition dipole moments in the lowest-energy transition. Enantiomers with parallel ETDM–MTDM configurations consistently outperform their antiparallel counterparts. Notably, this bias also manifests in natural systems, suggesting a shared stereoelectronic principle. We define this stereoelectronic correlation as the Supplementary Angle Effect (SAE). Our findings establish SAE in electrocatalysis offering a quantitative descriptor for assessing how molecular handedness affects catalytic behavior and enantiodifferential performance.</p><p></p>

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Parallel alignment of electric and magnetic transition dipole moments in chiral additives can boost the oxygen evolution reaction

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月27日

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  • Julia Portela-Pino,
  • Isilda Amorim,
  • Stefano Chiussi,
  • Laura M. Salonen,
  • Ani Ozcelik,
  • Daniel Aranda,
  • Joonas Uusitalo,
  • Ángeles Peña-Gallego,
  • Fabrizio Santoro,
  • Yury V. Kolen’ko,
  • José Lorenzo Alonso-Gómez

摘要

Homochirality, the uniformity in single molecular handedness, is a defining feature of life. Although universal in biology, the evolutionary advantage of selecting one enantiomer over its mirror image remains unresolved. One possible clue may lie in catalysis itself: recent studies demonstrate that oxygen evolution reaction (OER), a key step in photosynthesis, is sensitive to chirality. Here, we report that electrochemical OER performance with chiral additives may be correlated to the alignment of their electric (ETDM) and magnetic (MTDM) transition dipole moments in the lowest-energy transition. Enantiomers with parallel ETDM–MTDM configurations consistently outperform their antiparallel counterparts. Notably, this bias also manifests in natural systems, suggesting a shared stereoelectronic principle. We define this stereoelectronic correlation as the Supplementary Angle Effect (SAE). Our findings establish SAE in electrocatalysis offering a quantitative descriptor for assessing how molecular handedness affects catalytic behavior and enantiodifferential performance.