chemistrymaterialsresearch news

New crystal-glass composite MOFs

By 15th June 2019 June 28th, 2019 No Comments

Metal-organic frameworks (MOFs) are highly porous “cage” materials that can store and separate large quantities of gases such as CO2. They can also act as catalysts to speed up chemical reactions. The problem, however, is that their crystalline structure in powder form makes them difficult to manipulate in practice. An international collaboration[1] including a team from the Institut de recherche de Chimie Paris (CNRS/Chimie ParisTech) and the Matériaux divisés, interfaces, réactivité, électrochimie laboratory (CNRS/Aix-Marseille Université) led by François-Xavier Coudert has now designed, synthesized and characterized a new class of functional, stable and porous composite materials in glass form.

MOF

Schematic diagram of the crystal–glass composite fabrication process. Adapted from from Fig. 1b in the Nature Communicationspaper. Licensed under a Creative Commons Attribution 4.0 International License “

The materials are composed of a MOF crystal within a MOF glass. The interfacial interactions between these two phases improve the mechanical properties of the composite matrix. What is more, the crystal-glass composite allows the crystalline MOF structure to “freeze” into a structure in which the pores are wider, which means they can adsorb much more CO2 . The results are published in Nature Communications.

[1] Involving France, the UK, Australia, China and Slovenia

Read the research paper: Jingwei Hou, Christopher W. Ashling, Sean M. Collins, Andraž Krajnc, Chao Zhou, Louis Longley, Duncan N. Johnstone, Philip A. Chater, Shichun Li, Marie-Vanessa Coulet, Philip L. Llewellyn, François-Xavier Coudert, David A. Keen, Paul A. Midgley, Gregor Mali, Vicki Chen, Thomas D. Bennett. Metal-Organic Framework Crystal-Glass Composites. Nature Communications

Source: INC