近日，南京林业大学田丹团队研究了增强光热太阳能水蒸发的有机金属笼结构优化。2025年9月3日出版的《结构化学》杂志发表了这项成果。

有机金属笼的结构合成和性能探索一直受到化学家们的广泛关注。然而，通过结构调节来增强光热性能及其在太阳能驱动水蒸发中的应用方面的成果仍然很少。以四齿吡啶基配体L1为基础，通过合理选择不同的构建单元E1、E2、E3和E4，合成了具有不同功能位点的有机金属笼1、2、3和4。这些配合物通过单晶x射线衍射分析、核磁共振（NMR）光谱分析和ESI-TOF-MS分析进行了表征。

值得注意的是，它们表现出不同的近红外（NIR）光热转换性能，这是由于它们的尺寸、共轭面积、建筑单元中卤素原子的吸电子特性的变化。化合物4光热性能最佳，近红外吸收显著增强，光热转换效率最高。建筑单元的激进效应对光热转换能力起着重要的作用，EPR信号的显著变化证明了这一点。因此，化合物4以构建新膜1'；为主题，实现了1.92 kg·m^-2·h^-1的太阳能诱导水蒸汽产率，表明其适合通过海水淡化和废水处理收集淡水。该研究为半夹层有机金属笼的合成和光热转换性能的优化提供了一种新的策略。

附：英文原文

Title: Structural optimization of organometallic cages for enhanced photothermal solar water evaporation

Author: anonymous

Issue&Volume: 2025-09-03

Abstract: The structural synthesis and property exploration of organometallic cages has always attracted widespread attention from chemists. Nevertheless, the achievement on photothermal property enhancement and their application in solar-driven water evaporation via structural modulation remains scarce. Here, four organometallic cages 1, 2, 3 and 4 with different functional sites are synthesized via reasonably selecting different building units E1, E2, E3 and E4 based on a tetradentate pyridyl ligand L1. These complexes are characterized by single-crystal X-ray diffraction analysis, nuclear magnetic resonance (NMR) spectroscopy and ESI-TOF-MS analysis. Notably, they exhibit different near-infrared (NIR) photothermal conversion properties due to variations in their size, conjugated area, electron-withdrawing characteristic of halogen atoms in building units. Compound 4 shows the optimal photothermal performance among the series, with notably enhanced near-infrared absorption and the highest photothermal conversion efficiency. The radical effect of the building unit plays an important role in photothermal conversion ability as evidenced by the significant EPR signal changes. Therefore, compound 4 is used to construct new membrane 1', achieving a solar power-induced water steam generation rate of 1.92 kg·m-2·h-1, demonstrating its suitability for the collection of fresh water through desalination and wastewater treatment.. This research provides a new strategy for synthesizing and optimizing photothermal conversion property of half sandwich organometallic cages.

DOI: 10.1016/j.cjsc.2025.100705

Source: http://cjsc.ac.cn/cms/issues/860