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<p>Designing isomers and elucidating their structure-property relationships are central to advancing chemistry and materials science. Two one-dimensional coordination polymers featuring dual scandium-salen centers are prepared as coordination orientation isomers, sharing identical composition but adopting distinct zigzag or linear chain structures. The zigzag isomer achieves a hydrogen peroxide photosynthesis rate of 0.390 mol g<sub>cat.</sub><sup>−1</sup> h<sup>-1</sup> in an aqueous system employing 1,2,3,4-tetrahydroisoquinoline as sacrificial agent under full-spectrum light, while the linear isomer shows lower activity. A concerted mechanism is revealed, involving co-activation of oxygen and the organic donor through direct proton-coupled electron transfer. The zigzag architecture enhances charge separation via a stronger built-in electric field and stabilizes key co-activation intermediates. In this work, we show that constructing isomeric coordination polymers with tailored spatial and electronic structures provides an avenue for advancing artificial photosynthesis.</p>

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Coordination orientation isomerism boosting concerted hydrogen peroxide photosynthesis

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月7日

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  • Aiguo Kong,
  • Yue Chen,
  • Yingying Zou,
  • Junlin Gu,
  • Rui Liu,
  • Guangfeng Wei,
  • Chengzhong Yu

摘要

Designing isomers and elucidating their structure-property relationships are central to advancing chemistry and materials science. Two one-dimensional coordination polymers featuring dual scandium-salen centers are prepared as coordination orientation isomers, sharing identical composition but adopting distinct zigzag or linear chain structures. The zigzag isomer achieves a hydrogen peroxide photosynthesis rate of 0.390 mol gcat.−1 h-1 in an aqueous system employing 1,2,3,4-tetrahydroisoquinoline as sacrificial agent under full-spectrum light, while the linear isomer shows lower activity. A concerted mechanism is revealed, involving co-activation of oxygen and the organic donor through direct proton-coupled electron transfer. The zigzag architecture enhances charge separation via a stronger built-in electric field and stabilizes key co-activation intermediates. In this work, we show that constructing isomeric coordination polymers with tailored spatial and electronic structures provides an avenue for advancing artificial photosynthesis.