Seed-mediated evolution of hierarchical metal-organic framework quaternary superstructures.,Chemical Science

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Seed-mediated evolution of hierarchical metal-organic framework quaternary superstructures.
Chemical Science ( IF 7.6 ) Pub Date : 2020-01-03 , DOI: 10.1039/c9sc06064b
Liang Feng ₁ , Kun-Yu Wang ₁ , Tian-Hao Yan ₁ , Hong-Cai Zhou _{1,

2}

Affiliation

The idea of hierarchy, widely observed in natural and artificial worlds, has been extensively explored in chemistry and materials science. Similar to proteins which contain primary, secondary, tertiary and quaternary structures, varying levels of hierarchy in metal-organic framework (MOF) superstructures can also be achieved. In this work, we initiate a systematic study on the morphological evolution of hierarchical superstructures with the assistance of seeded growth and explore the assembly of multiple modular MOFs into superstructures with enhanced hierarchy and diversity. By utilizing MOF-74-III spherulite superstructures as seeds, multiple quaternary architectures were obtained depending on the lengths of organic linker precursors. The resulting superstructures with superior hierarchy represent a unique porous material which contains multiple modules with diverse morphologies. To the best of our knowledge, this is the first report that utilizes tertiary superstructures as seeds in MOF synthesis, which leads to unusual and diverse behaviors during secondary growth. This synthetic approach not only provides a facile method to establish hierarchy in porous materials, but also enables the fabrication of multiscale heterostructures through secondary growth on MOF seeds.

中文翻译：

种子介导的金属-有机骨架四级超结构的演化。

在自然和人造世界中广泛观察到的层次结构概念已经在化学和材料科学中进行了广泛的探索。类似于包含一级，二级，三级和四级结构的蛋白质，也可以实现金属-有机骨架（MOF）上层结构中层次结构的变化。在这项工作中，我们将在种子生长的辅助下，开始对上层建筑的形态演化进行系统的研究，并探索将多个模块化MOF组装成具有增强的上层建筑和多样性的上层建筑。通过利用MOF-74-III球晶的超结构作为种子，根据有机连接剂前体的长度，获得了多种四级结构。最终获得的具有上乘层次的上层建筑代表了一种独特的多孔材料，其中包含具有不同形态的多个模块。据我们所知，这是第一份利用三级超结构作为MOF合成种子的报告，这导致了次级生长过程中异常和多样化的行为。这种合成方法不仅提供了一种在多孔材料中建立层次结构的简便方法，而且还可以通过在MOF种子上进行二次生长来制造多尺度异质结构。

更新日期：2020-02-13

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