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Synthesis and properties of a compositional series of MIL-53(Al) metal-organic framework crystal-glass composites

DOI: 10.1021/jacs.9b07557 DOI Help

Authors: Christopher W. Ashling (University of Cambridge) , Duncan N. Johnstone (University of Cambridge) , Remo N. Widmer (University of Cambridge) , Jingwei Hou (University of Cambridge) , Sean M. Collins (University of Cambridge) , Adam F. Sapnik (University of Cambridge) , Alice M. Bumstead (University of Cambridge) , Philip A. Chater (Diamond Light Source) , David A. Keen (ISIS Facility) , Thomas Bennett (University of Cambridge)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of The American Chemical Society

State: Published (Approved)
Published: September 2019
Diamond Proposal Number(s): 20038 , 20195

Abstract: Metal-organic framework crystal-glass composites (MOF-CGCs) are materials in which a crystalline MOF is dispersed within a MOF glass. In this work, we explore the room temperature stabilization of the open-pore form of MIL-53(Al), usually observed at high-temperature, which occurs upon encapsulation within a ZIF-62(Zn) MOF glass matrix. A series of MOF-CGCs containing different loadings of MIL-53(Al) were synthesized and characterized using X-ray diffraction and nuclear magnetic resonance spectroscopy. An upper limit of MIL-53(Al) that can be stabilized in the composite was determined for the first time. The nanostructure of the composites was probed using pair distribution function analysis and scanning transmission electron microscopy. Notably, the distribution and integrity of the crystalline compo-nent in a sample series was determined, and these findings related to the MOF-CGC gas adsorption capacity in order to identify the optimal loading necessary for maximum CO2 sorption capacity.

Subject Areas: Materials

Diamond Offline Facilities: Electron Physical Sciences Imaging Centre (ePSIC)
Instruments: E02-JEM ARM 300CF , I15-1-X-ray Pair Distribution Function (XPDF)