scholarly journals Thermal Expansion of Metal–Organic Framework Crystal–Glass Composites

2021 ◽  
Author(s):  
Christopher Ashling ◽  
Giulio I. Lampronti ◽  
Thomas J. F. Southern ◽  
Rachel Evans ◽  
Thomas Bennett
Keyword(s):  
Thermal Expansion ◽  
Glass Matrix ◽  
Variable Temperature ◽  
Metal Organic Framework ◽  
Mechanical Analysis ◽  
Thermal Expansivity ◽  
Crystal Glass ◽  
Glass Composites ◽  
Metal Organic ◽  
Organic Framework

<a>Metal-organic framework crystal-glass composites (MOF CGCs) are a class of materials comprising a crystalline framework embedded within a MOF glass matrix. Here, we investigate the thermal expansion behavior of three MOF CGCs, incorporating two flexible (MIL-53(Al) and MIL-118) and one rigid (UL-MOF-1) MOF within a ZIF-62 glass matrix. Specifically, variable-temperature powder X-ray diffraction data and thermo-mechanical analysis show the suppression of thermal expansivity in each of these three crystalline MOFs when suspended within a ZIF-62 glass matrix. In particular, for the two flexible frameworks, the average volumetric thermal expansion (<i>β</i>) was found to be near-zero in the crystal-glass composite.</a> These results provide a route to engineering thermal expansivity in stimuli-responsive MOF glass composites.

scholarly journals Thermal Expansion of Metal–Organic Framework Crystal–Glass Composites

2021 ◽  
Author(s):  
Christopher Ashling ◽  
Giulio I. Lampronti ◽  
Thomas J. F. Southern ◽  
Rachel Evans ◽  
Thomas Bennett
Keyword(s):  
Thermal Expansion ◽  
Glass Matrix ◽  
Variable Temperature ◽  
Metal Organic Framework ◽  
Mechanical Analysis ◽  
Thermal Expansivity ◽  
Crystal Glass ◽  
Glass Composites ◽  
Metal Organic ◽  
Organic Framework

<a>Metal-organic framework crystal-glass composites (MOF CGCs) are a class of materials comprising a crystalline framework embedded within a MOF glass matrix. Here, we investigate the thermal expansion behavior of three MOF CGCs, incorporating two flexible (MIL-53(Al) and MIL-118) and one rigid (UL-MOF-1) MOF within a ZIF-62 glass matrix. Specifically, variable-temperature powder X-ray diffraction data and thermo-mechanical analysis show the suppression of thermal expansivity in each of these three crystalline MOFs when suspended within a ZIF-62 glass matrix. In particular, for the two flexible frameworks, the average volumetric thermal expansion (<i>β</i>) was found to be near-zero in the crystal-glass composite.</a> These results provide a route to engineering thermal expansivity in stimuli-responsive MOF glass composites.

scholarly journals Metal-Organic Framework Crystal-Glass Composites

2019 ◽  
Author(s):  
Jingwei Hou ◽  
Christopher W. Ashling ◽  
Sean M. Collins ◽  
Andraž Krajnc ◽  
Chao Zhou ◽  
...  
Keyword(s):  
Glass Matrix ◽  
Electron Tomography ◽  
Metal Organic Framework ◽  
Crystal Glass ◽  
Design Synthesis ◽  
Structural Characterisation ◽  
Glass Composites ◽  
Composite Glass ◽  
Metal Organic ◽  
Organic Framework

The majority of research into metal-organic frameworks (MOFs) focuses on their crystalline nature. However, in recent research the vitrification of a number of MOFs has been revealed. We propose that the solid-liquid phase transitions involved in MOF-glass formation can provide unique opportunities for the creation of a new class of functional, stable and porous composite materials. Described herein is the design, synthesis, and characterisation of novel metal-organic framework (MOF) crystal-glass composites, formed by dispersing crystalline MOFs within a MOF-glass matrix. We demonstrate using structural characterisation and analytical electron tomography, that the coordinative bonding and chemical structure of a MIL-53 crystalline phase are preserved within the ZIF-62 glass matrix. Whilst separated phases, the microdomains of each lie close to one another and possess interfacial interactions which 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, is stabilized at room temperature in the crystal-glass composite. This leads to a significant improvement of CO<sub>2</sub> adsorption capacity.

scholarly journals Metal-Organic Framework Crystal-Glass Composites

2018 ◽  
Author(s):  
Jingwei Hou ◽  
Christopher W. Ashling ◽  
Sean M. Collins ◽  
Andraž Krajnc ◽  
Chao Zhou ◽  
...  
Keyword(s):  
Glass Matrix ◽  
Gas Adsorption ◽  
Electron Tomography ◽  
Metal Organic Framework ◽  
Crystal Glass ◽  
Glass Composite ◽  
Structural Characterisation ◽  
Glass Composites ◽  
Metal Organic ◽  
Organic Framework

The majority of research into metal-organic frameworks (MOFs) focuses on their crystalline nature. However, in recent research the vitrification of a number of MOFs has been revealed. We propose that the solid-liquid phase transitions involved in MOF-glass formation can provide unique opportunities for the creation of a new class of functional, stable and porous composite materials. Described herein is the design, synthesis, and characterisation of novel metal-organic framework (MOF) crystal-glass composites, formed by dispersing crystalline MOFs within a MOF-glass matrix. We demonstrate using structural characterisation and analytical electron tomography, that the coordinative bonding and chemical structure of a MIL-53 crystalline phase are preserved within the ZIF-62 glass matrix. Whilst separated phases, the microdomains of each lie close to one another and possess interfacial interactions which 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, is stabilized at room temperature in the crystal-glass composite. This leads to a significantly higher gas adsorption capacity for the crystal-glass composite than for either constituent phase.

scholarly journals Metal-Organic Framework Crystal-Glass Composites

2019 ◽  
Author(s):  
Jingwei Hou ◽  
Christopher W. Ashling ◽  
Sean M. Collins ◽  
Andraž Krajnc ◽  
Chao Zhou ◽  
...  
Keyword(s):  
Glass Matrix ◽  
Electron Tomography ◽  
Metal Organic Framework ◽  
Crystal Glass ◽  
Design Synthesis ◽  
Structural Characterisation ◽  
Glass Composites ◽  
Composite Glass ◽  
Metal Organic ◽  
Organic Framework

The majority of research into metal-organic frameworks (MOFs) focuses on their crystalline nature. However, in recent research the vitrification of a number of MOFs has been revealed. We propose that the solid-liquid phase transitions involved in MOF-glass formation can provide unique opportunities for the creation of a new class of functional, stable and porous composite materials. Described herein is the design, synthesis, and characterisation of novel metal-organic framework (MOF) crystal-glass composites, formed by dispersing crystalline MOFs within a MOF-glass matrix. We demonstrate using structural characterisation and analytical electron tomography, that the coordinative bonding and chemical structure of a MIL-53 crystalline phase are preserved within the ZIF-62 glass matrix. Whilst separated phases, the microdomains of each lie close to one another and possess interfacial interactions which 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, is stabilized at room temperature in the crystal-glass composite. This leads to a significant improvement of CO<sub>2</sub> adsorption capacity.

Novel metal–organic framework materials: blends, liquids, glasses and crystal–glass composites

2019 ◽  
Vol 55 (60) ◽  
pp. 8705-8715 ◽  
Author(s):  
Joshua M. Tuffnell ◽  
Christopher W. Ashling ◽  
Jingwei Hou ◽  
Shichun Li ◽  
Louis Longley ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Crystal Glass ◽  
Zeolitic Imidazolate Framework ◽  
Feature Article ◽  
Glass Composites ◽  
Framework Materials ◽  
Recent Advances ◽  
Metal Organic ◽  
Organic Framework

This Feature Article reviews a range of amorphisation mechanisms of Metal–Organic Frameworks (MOFs) and presents recent advances to produce novel MOF materials including porous MOF glasses, MOF crystal–glass composites, flux melted MOF glasses and blended zeolitic imidazolate framework glasses.

scholarly journals A new route to porous metal–organic framework crystal–glass composites

2020 ◽  
Vol 11 (36) ◽  
pp. 9910-9918
Author(s):  
Shichun Li ◽  
Shuwen Yu ◽  
Sean M. Collins ◽  
Duncan N. Johnstone ◽  
Christopher W. Ashling ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Porous Metal ◽  
Crystal Glass ◽  
Glass Composites ◽  
Metal Organic ◽  
Lower Temperature ◽  
Organic Framework

A lower temperature route to metal–organic framework crystal–glass composites is presented. Specifically, the annealing pre-formed ZIF-62 glass with a crystalline MOF above Tg will enable formation of a greatly expanded range of materials.

scholarly journals Metal-organic framework crystal-glass composites

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Jingwei Hou ◽  
Christopher W. Ashling ◽  
Sean M. Collins ◽  
Andraž Krajnc ◽  
Chao Zhou ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Crystal Glass ◽  
Glass Composites ◽  
Metal Organic ◽  
Organic Framework

Properties of Single‐Component Metal–Organic Framework Crystal‐Glass Composites

2021 ◽  
Author(s):  
Lauren N. McHugh ◽  
Michael F. Thorne ◽  
Georgina Robertson ◽  
Giorgio Divitini ◽  
Thomas D. Bennett
Keyword(s):  
Metal Organic Framework ◽  
Single Component ◽  
Crystal Glass ◽  
Glass Composites ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Guest size limitation in metal–organic framework crystal–glass composites

2021 ◽  
Vol 9 (13) ◽  
pp. 8386-8393
Author(s):  
Christopher W. Ashling ◽  
Lauren K. Macreadie ◽  
Thomas J. F. Southern ◽  
Yiming Zhang ◽  
Lauren N. McHugh ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Crystal Glass ◽  
Gas Uptake ◽  
Glass Composites ◽  
Size Limitation ◽  
Metal Organic ◽  
Organic Framework

MOF crystal-glass composites (MOF CGCs) are materials with crystalline MOFs embedded within a MOF glass. Here we develop two novel MOF CGCs, and explore the gas uptake and guest-size limitations within these materials.

scholarly journals Synthesis and Properties of a Compositional Series of MIL-53(Al) Metal-Organic Framework Crystal-Glass Composites

2019 ◽  
Author(s):  
Christopher W. Ashling ◽  
Duncan Johnstone ◽  
Remo Widmer ◽  
Jingwei Hou ◽  
Sean M. Collins ◽  
...  
Keyword(s):  
Gas Adsorption ◽  
Function Analysis ◽  
Metal Organic Framework ◽  
Crystal Glass ◽  
Resonance Spectroscopy ◽  
Glass Composites ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Metal Organic ◽  
Organic Framework

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 stabilisation 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 were synthesised and characterised using X-ray diffraction and nuclear magnetic resonance spectroscopy. An upper limit of MIL-53 that can be stabilised in the composite was determined. The nanostructure of the composites was probed using pair distribution function analysis and scanning transmission electron microscopy. The distribution and integrity of the crystalline component was determined, and these findings related to the MOF-CGC gas adsorption capacity in order to identify the optimal loading necessary for maximum CO<sub>2</sub> sorption capacity.

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