Interfacial synthesis of hollow metal-organic framework capsules demonstrating selective permeability
Interfacial synthesis of hollow metal-organic framework capsules demonstrating selective permeability
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DOI：
10.1038/nchem.1026
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发表时间：
2011-05-01
期刊：
影响因子：
21.8
通讯作者：
De Vos, Dirk E.
中科院分区：
文献类型：
--
作者：
Ameloot, Rob;Vermoortele, Frederik;De Vos, Dirk E.
金属有机框架（MOF）是一类晶体材料，由通过配位键连接在一起的金属离子和有机配体组成。由于它们的孔隙率以及将大表面积与可定制的孔隙特性相结合的可能性，这些固体在广泛的应用中显示出巨大的前景。尽管目前正在研究的大多数应用都是基于粉末固体，但开发制备无缺陷 MOF 层的合成方法也将使基于选择性渗透的应用成为可能。在这里，我们展示了 MOF 的本质杂化特性如何实现 MOF 薄层的自我完成生长。此外，这些层可以成形为空心胶囊，其表现出与形成胶囊壁的 MOF 微晶的微孔尺寸直接相关的选择性渗透性。这种胶囊可以有效地捕获客体物质，并且在未来可以应用于含有分子催化剂的选择性微反应器的开发。
Metal-organic frameworks (MOFs) are a class of crystalline materials that consist of metal ions and organic ligands linked together by coordination bonds. Because of their porosity and the possibility of combining large surface areas with pore characteristics that can be tailored, these solids show great promise for a wide range of applications. Although most applications currently under investigation are based on powdered solids, developing synthetic methods to prepare defectfree MOF layers will also enable applications based on selective permeation. Here, we demonstrate how the intrinsically hybrid nature of MOFs enables the self-completing growth of thin MOF layers. Moreover, these layers can be shaped as hollow capsules that demonstrate selective permeability directly related to the micropore size of the MOF crystallites forming the capsule wall. Such capsules effectively entrap guest species, and, in the future, could be applied in the development of selective microreactors containing molecular catalysts.