近日，瑞士巴塞尔大学Oliver S. Wenger团队实现了在分子化合物中光诱导的双电荷积累。相关论文发表在2025年8月25日出版的《自然-化学》杂志上。

光化学涉及到单个电子转移的基本步骤，但人工光合作用需要多电子反应。这种差异需要光驱动电荷积累，迄今为止，如果不牺牲氧化还原试剂很难实现。

研究组报告了一种分子供体-光敏剂-受体化合物，其中光吸收导致两个正电荷和两个负电荷的可逆积累。由此产生的光产物形式的总量子产率为37%，寿命超过100ns，储存3.0eV的能量。使用结构明确的分子化合物为如何在比可比系统低几个数量级的辐照度水平下有效和可持续地进行光驱动的多电子转移提供了基本的见解。这代表着从光诱导（单）电子转移的基础研究向太阳能燃料的更多应用导向研究迈出了一步。

附：英文原文

Title: Photoinduced double charge accumulation in a molecular compound

Author: Brndlin, Mathis, Pfund, Bjrn, Wenger, Oliver S.

Issue&Volume: 2025-08-25

Abstract: Photochemistry involves elementary steps in which single electrons are transferred, but artificial photosynthesis requires multi-electron reactions. This discrepancy necessitates light-driven charge accumulation, which has so far proved very difficult to achieve without sacrificial redox reagents. Here we report a molecular donor–photosensitizer–acceptor compound in which light absorption leads to the reversible accumulation of two positive and two negative charges. The resulting photoproduct forms with an overall quantum yield of 37%, has a lifetime of more than 100ns and stores 3.0eV of energy. The use of a structurally well-defined molecular compound provides fundamental insights into how light-driven multi-electron transfer can generally be performed efficiently and sustainably, at irradiance levels orders of magnitude below those required in comparable systems. This represents a step towards more application-oriented research on solar fuels from fundamental studies of photoinduced (single) electron transfer.

DOI: 10.1038/s41557-025-01912-x

Source: https://www.nature.com/articles/s41557-025-01912-x