Self-Assembly of Metal-Organic Frameworks into Monolithic Materials with Highly Controlled Trimodal Pore Structures.,Angewandte Chemie International Edition

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Self-Assembly of Metal-Organic Frameworks into Monolithic Materials with Highly Controlled Trimodal Pore Structures.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2019-11-08 , DOI: 10.1002/anie.201911499
Yosuke Hara ₁ , Kazuyoshi Kanamori ₁ , Kazuki Nakanishi _{2,

3}

Affiliation

We present a two-step template-free approach toward monolithic materials with controlled trimodal porous structures with macro-, meso-, and micropores. Our method relies on two ordering processes in discrete length scales: 1) Spontaneous formation of macroporous structures in monolithic materials by the sol-gel process through the short-range ordered self-assembly of metal-organic frameworks (MOFs), and 2) reorganization of the framework structures in a mediator solution. The Zr-terephthalate-based MOF (UiO-66-NH2 ) was adopted as a proof of concept. The self-assembly-induced phase separation process offered interconnected macropores with diameters ranging from 0.9 to 1.8 μm. The subsequent reorganization process converted the microporous structure from low crystalline framework to crystalline UiO-66. The resultant mesopore size within the skeletons was controlled in the range from 9 to 21 nm. This approach provides a novel way of designing spaces from nano- to micrometer scale in network-forming materials.

中文翻译：

将金属有机骨架自组装为具有高度受控的三峰孔隙结构的整体材料。

我们针对具有可控三峰多孔结构的大孔，中孔和微孔的整体材料，提供了一种无需两步模板的方法。我们的方法依赖于离散长度尺度上的两个有序过程：1）通过有机金属框架（MOF）的短程有序自组装通过溶胶-凝胶过程自发形成单片材料中的大孔结构，以及2）重组调解器解决方案中的框架结构。采用基于对苯二甲酸Zr的MOF（UiO-66-NH2）作为概念证明。自组装诱导的相分离过程提供了相互连接的大孔，直径范围从0.9到1.8μm。随后的重组过程将微孔结构从低结晶构架转变为结晶UiO-66。骨架中所得的中孔尺寸被控制在9至21nm的范围内。这种方法提供了一种新颖的方式来设计网络形成材料中从纳米级到微米级的空间。

更新日期：2019-11-08

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