Metal-organic framework crystal-glass composites

Jingwei Hou (1) , Christopher W Ashling (1) , Sean M Collins (1) , Andraž Krajnc (2) , Chao Zhou (1) , Louis Longley (1) , Duncan N Johnstone (1) , Philip A Chater , Shichun Li (1) , Marie-Vanessa Coulet (3) , Philip Llewellyn (3) , François-Xavier Coudert (4) , David A Keen (5) , Paul A Midgley (1) , Gregor Mali (2) , Vicki Chen (6, 7) , Thomas D Bennett (1)

1 DMSM - Department of Materials Science and Metallurgy [Cambridge University]
2 KI - National Institute of Chemistry [Llubljana]
3 MADIREL - Matériaux divisés, interfaces, réactivité, électrochimie
4 IRCP - Institut de Recherche de Chimie Paris
5 RAL - STFC Rutherford Appleton Laboratory
6 UNSW - University of New South Wales [Sydney]
7 UQ [All campuses : Brisbane, Dutton Park Gatton, Herston, St Lucia and other locations] - The University of Queensland

The majority of research into metal-organic frameworks (MOFs) focuses on their crystalline nature. Recent research has revealed solid-liquid transitions within the family, which we use here to create a class of functional, stable and porous composite materials. Described herein is the design, synthesis, and characterisation of MOF crystal-glass composites, formed by dispersing crystalline MOFs within a MOF-glass matrix. The coordinative bonding and chemical structure of a MIL-53 crystalline phase are preserved within the ZIF-62 glass matrix. Whilst separated phases, the interfacial interactions between the closely contacted microdomains improve the mechanical properties of the composite glass. More significantly, the high temperature open pore phase of MIL-53, which spontaneously transforms to a narrow pore upon cooling in the presence of water, is stabilised at room temperature in the crystal-glass composite. This leads to a significant improvement of CO2 adsorption capacity.

Domaines: Matériaux

Jingwei Hou, Christopher W Ashling, Sean M Collins, Andraž Krajnc, Chao Zhou, et al.. Metal-organic framework crystal-glass composites. Nature Communications, 2019, 10, pp.2580. ⟨10.1038/s41467-019-10470-z⟩. ⟨hal-02264091⟩