Metal–organic framework (MOF) films have recently emerged as highly permselective membranes yielding orders of magnitude higher gas permeance than that from the conventional membranes. However, synthesis of highly intergrown, ultrathin MOF films on porous supports without complex support‐modification has proven to be a challenge. Moreover, there is an urgent need of a generic crystallization route capable of synthesizing a wide range of MOF structures in an intergrown, thin‐film morphology. Herein, a novel electrophoretic nuclei assembly for crystallization of highly intergrown thin‐films (ENACT) approach, that allows synthesis of ultrathin, defect‐free ZIF‐8 on a wide range of unmodified supports (porous polyacrylonitrile, anodized aluminum oxide, metal foil, porous carbon and graphene), is reported. As a result, a remarkably high H₂ permeance of 8.3 × 10⁻⁶ mol m⁻² s⁻¹ Pa⁻¹ and ideal gas selectivities of 7.3, 15.5, 16.2, and 2655 for H₂/CO₂, H₂/N₂, H₂/CH₄, and H₂/C₃H₈, respectively, are achieved from an ultrathin (500 nm thick) ZIF‐8 membrane. A high C₃H₆ permeance of 9.9 × 10⁻⁸ mol m⁻² s⁻¹ Pa⁻¹ and an attractive C₃H₆/C₃H₈ selectivity of 31.6 are obtained. The ENACT approach is straightforward, reproducible and can be extended to a wide range of nanoporous crystals, and its application in the fabrication of intergrown ZIF‐7 films is demonstrated.

中文翻译：

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电泳核组件，用于未经修饰的载体上的高性能膜的结晶

金属有机骨架（MOF）膜最近已成为具有高选择性的膜，与传统膜相比，其气体渗透率高出几个数量级。然而，事实证明，在多孔载体上合成高度共生的超薄MOF膜而不进行复杂的载体修饰是一项挑战。此外，迫切需要一种能够以互生的薄膜形态合成多种MOF结构的通用结晶途径。本文介绍了一种用于高度共生薄膜结晶的新型电泳核组件（ENACT），它可以在各种未改性的载体（多孔聚丙烯腈，阳极氧化铝，金属箔，多孔碳和石墨烯）。结果，H值非常高₂渗透性的8.3×10 ^-6摩尔米^-2小号^-1帕^-1和7.3理想气体选择性，15.5，16.2，和2655用于h ₂ / CO ₂，H ₂ / N ₂，H ₂ / CH ₄，和H ₂ / C ₃ H ₈分别是由超薄（500 nm厚）的ZIF-8膜实现的。9.9×10 ^-8 mol m ^-2 s ^-1 Pa ^-1的高C ₃ H ₆磁导率和吸引人的C ₃ H ₆获得的C ₃ H ₈选择性为31.6。ENACT方法简单，可重现，并且可以扩展到各种纳米多孔晶体，并证明了其在共生ZIF-7薄膜制造中的应用。