An ultra-tunable platform for molecular engineering of high-performance crystalline porous materials.

Quan-Guo Zhai,Xianhui Bu,Pingyun Feng,Luke Daemen,Xiang Zhao,Yongqiang Cheng,Chengyu Mao,Anibal J Ramirez-Cuesta

doi:10.1038/ncomms13645

Abstract

Metal-organic frameworks are a class of crystalline porous materials with potential applications in catalysis, gas separation and storage, and so on. Of great importance is the development of innovative synthetic strategies to optimize porosity, composition and functionality to target specific applications. Here we show a platform for the development of metal-organic materials and control of their gas sorption properties. This platform can accommodate a large variety of organic ligands and homo- or hetero-metallic clusters, which allows for extraordinary tunability in gas sorption properties. Even without any strong binding sites, most members of this platform exhibit high gas uptake capacity. The high capacity is accomplished with an isosteric heat of adsorption as low as 20 kJ mol−1 for carbon dioxide, which could bring a distinct economic advantage because of the significantly reduced energy consumption for activation and regeneration of adsorbents.

Highlights

Metal-organic frameworks are a class of crystalline porous materials with potential applications in catalysis, gas separation and storage, and so on
Due to the low Qst, the process of activation, adsorption, and regeneration induces no strain on the host frameworks, and these pacs materials suffer no loss in crystallinity through these processes, which indicates excellent recyclability of these extraordinary adsorbents
Our first-step strategy in this study is inspired by the chemical composition and the recording-setting CO2 uptake property of metal-organic framework (MOF)-74-Mg

Summary

Introduction

Metal-organic frameworks are a class of crystalline porous materials with potential applications in catalysis, gas separation and storage, and so on. Crystalline porous materials (CPM), metal-organic framework (MOF) materials in particular, have risen to a prominent position, because their compositional and structural variety lends them a great potential for property engineering[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25]. While the MOF-74 structure type has highly desirable features such as high-density open-metal sites, as a platform for property engineering, it has significant limitations with respect to its compositional tunability. While many MOF structure types are known and some of them do have far greater compositional diversity than

Methods

Results

Conclusion