近日，华南师范大学兰亚乾团队报道了侧链基团设计调控金属有机框架纳米片的微米级分子堆积及其光热催化应用。2025年12月16日，《德国应用化学》杂志发表了这一成果。

将金属有机框架材料制备成兼具高结晶度与多功能性的大尺寸纳米片，对其拓展应用至关重要。

研究组通过配体侧链基团设计，利用不同侧链诱导效应，成功制备了二维MOFs材料（2D-Cu(NDI-NHEt)）与对比三维Cu3基MOFs材料（3D-Cu(NDI-H)）。有趣的是，2D-Cu(NDI-NHEt)可在温和条件下剥离为微米级纳米片（2D-Cu(NDI-NHEt) NSs），而3D-Cu(NDI-H)在相同条件下难以剥离。值得注意的是，所得2D-Cu(NDI-NHEt) NSs不仅具备高结晶度、多孔结构、超薄厚度（约1.3纳米）和丰富的功能单元，而且在光热催化中展现出显著优于2D-Cu(NDI-NHEt)块体材料与3D-Cu(NDI-H)的性能。

通过多种表征手段结合理论计算，研究组揭示了材料的结构-性能关系及其作用机制。这些发现为理解MOFs大尺寸纳米片制备中的分子组装机制提供了关键依据，有助于推动高效光催化应用的发展。

附：英文原文

Title: Pendant Group Design Toward Molecular Packing of Metal-Organic Frameworks Nanosheets in Micrometer-Scale for Photo-Thermal Catalysis

Author: Yi-Lu Yang, Tao-Yuan Yu, Ying-Ying Huang, Qi Li, Jia-Min Ke, Shuai-Bing Zhang, Ming-Jie Long, Yong Yan, Yifa Chen, Ya-Qian Lan

Issue&Volume: 2025-12-16

Abstract: Attempts that can fabricate metal-organic frameworks (MOFs) into large-scale nanosheets with high crystallinity and multi-functions are much desired for their extended applications. Here, through the pendant group design of ligands, we have successfully prepared a kind of two-dimensional MOFs (i.e., 2D-Cu(NDI-NHEt)) and a contrast three-dimensional Cu3-based MOFs (i.e., 3D-Cu(NDI-H)) via different side chain induction effects. Interestingly, 2D-Cu(NDI-NHEt) can be easily exfoliated into micrometer-scale nanosheets (i.e., 2D-Cu(NDI-NHEt) NSs), while 3D-Cu(NDI-H) is hard to exfoliate under similar conditions. Notably, the obtained 2D-Cu(NDI-NHEt) NSs possesses high crystallinity, porous structure, ultrathin thickness (～1.3 nm) and abundant functional units that can be successfully applied in photo-thermal catalysis, demonstrating much better performance than 2D-Cu(NDI-NHEt) and 3D-Cu(NDI-H). The structure-to-property relationships and possible mechanisms have been revealed by various characterizations coupled with theoretical calculations. These findings offer key understanding of molecular assembly in fabrication of MOFs into large-scale nanosheets for efficient photocatalytic applications.

DOI: 10.1002/anie.202524975

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202524975