<br>定向多晶 MOF 上部结构的制造,Advanced Materials

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定向多晶 MOF 上部结构的制造
Advanced Materials ( IF 27.4 ) Pub Date : 2023-11-28 , DOI: 10.1002/adma.202309645
Mercedes Linares-Moreau ₁ , Lea A Brandner ₁ , Miriam de J Velásquez-Hernández ₁ , Javier Fonseca ₂ , Youven Benseghir ₃ , Jia Min Chin ₃ , Daniel Maspoch _{2,

4,

5} , Christian Doonan ₆ , Paolo Falcaro ₁

Affiliation

金属有机框架（MOF）领域的发展已经超越了粉末和单晶材料的设计和探索。当前的挑战是制造有组织的上部结构，可以利用单个 MOF 晶体组成的方向特性。迄今为止，多晶 MOF 超结构制造方法的进步已经产生了具有明确晶体取向的密堆积结构。通过控制晶体取向，组成晶体的 MOF 孔道可以沿特定方向排列：这些系统具有各向异性特性，包括沿特定方向增强扩散、客体物质的优先取向以及功能客体的保护。从这个角度来看，我们讨论了 MOF 在定向多晶超结构制造方面的研究现状，重点关注特定的晶体取向方向。详细研究了三种方法：胶体 MOF 溶液的组装、使用外部场排列 MOF 颗粒以及异质外延陶瓷到 MOF 的生长。这一观点旨在促进该研究领域的进步，并激励开发用于制备具有定向孔道的 MOF 系统的新方案，从而使先进的基于 MOF 的器件具有各向异性。

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Fabrication of Oriented Polycrystalline MOF Superstructures

The field of metal-organic frameworks (MOFs) has progressed beyond the design and exploration of powdery and single-crystalline materials. A current challenge is the fabrication of organized superstructures that can harness the directional properties of the individual constituent MOF crystals. To date, the progress in the fabrication methods of polycrystalline MOF superstructures has led to close-packed structures with defined crystalline orientation. By controlling the crystalline orientation, the MOF pore channels of the constituent crystals can be aligned along specific directions: these systems possess anisotropic properties including enhanced diffusion along specific directions, preferential orientation of guest species, and protection of functional guests. In this perspective, we discuss the current status of MOF research in the fabrication of oriented polycrystalline superstructures focusing on the specific crystalline directions of orientation. Three methods are examined in detail: the assembly from colloidal MOF solutions, the use of external fields for the alignment of MOF particles, and the heteroepitaxial ceramic-to-MOF growth. This perspective aims at promoting the progress of this field of research and inspiring the development of new protocols for the preparation of MOF systems with oriented pore channels, to enable advanced MOF-based devices with anisotropic properties.

更新日期：2023-11-28

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