One-Step Asymmetric Growth of Continuous Metal–Organic Framework Thin Films on Two-Dimensional Colloidal Crystal Arrays: A Facile Approach toward Multifunctional Superstructures

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• 作者：Limei Li ; Xiuling Jiao ; Dairong Chen ; Cheng Li
• 刊名：Crystal Growth & Design
• 出版年：2016
• 出版时间：May 4, 2016
• 年：2016
• 卷：16
• 期：5
• 页码：2700-2707
• 全文大小：523K
• 年卷期：0
• ISSN：1528-7505

文摘

In this work, we present a facile approach toward producing multifunctional metal–organic framework (MOF) superstructures by asymmetric growth of continuous MOFs thin films on two-dimensional colloidal crystal arrays anchored at the air–solution interfaces, in which the control over spatial configuration, structural hierarchy, and overall dimensionality of MOF superstructures can be realized all at once. This interfacial growth method also endows MOF superstructures with an unprecedented transferability, which greatly facilitates the interfacing of MOF materials with other functional surfaces. We have demonstrated this by the construction of layered structures (including hybrid ones) that are promising for device applications. Taking advantage of the resultant periodic and hierarchical porous structures, the as-grown MOF superstructures lend themselves to efficient vapor sensing, size-screening of nanoparticles, and removal of dye molecules from aqueous solutions, and have exhibited a superior performance as compared to their unstructured counterparts. Therefore, this work not only presents an efficient route in well-organizing MOF nanocrystals at the meso-/macroscopic scale but also provides an inspiring example of enriching the material performance of MOFs by shaping their physical forms.