scholarly journals Disorder–order transitions in the perovskite metal–organic frameworks [(CH3)2NH2][M(HCOO)3] at high pressure

CrystEngComm ◽  
2018 ◽  
Vol 20 (25) ◽  
pp. 3512-3521 ◽  
Author(s):  
Ines E. Collings ◽  
Maxim Bykov ◽  
Elena Bykova ◽  
Michael Hanfland ◽  
Sander van Smaalen ◽  
...  
Keyword(s):  
High Pressure ◽  
Metal Organic Frameworks ◽  
Dynamic Disorder ◽  
Metal Organic ◽  
Metal Formate ◽  
Metal Formates

Compression of dimethylammonium metal formates results in distorted metal formate frameworks and loss of dynamic disorder of dimethylammonium simultaneously.

scholarly journals Compressibility Studies of Zirconium Based Metal-Organic Frameworks

2014 ◽  
Vol 70 (a1) ◽  
pp. C157-C157
Author(s):  
Claire Hobday ◽  
Stephen Moggach ◽  
Carole Morrison ◽  
Tina Duren ◽  
Ross Forgan
Keyword(s):  
High Pressure ◽  
Mechanical Stability ◽  
Metal Organic Frameworks ◽  
External Pressure ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Crystallography ◽  
Pressure Medium ◽  
Metal Organic ◽  
University Of Oslo

Metal-organic frameworks (MOFs) are a well-studied class of porous materials with the potential to be used in many applications such as gas storage and catalysis.[1] UiO-67 (UiO = University of Oslo), a MOF built from zirconium oxide units connected with 4,4-biphenyldicarboxylate (BDC) linkers, forms a face centred cubic structure. Zirconium has a high affinity towards oxygen ligands making these bridges very strong, resulting in UiO-based MOFs having high chemical and thermal stability compared to other MOF structures. Moreover, UiO-67 has become popular in engineering studies due to its high mechanical stability.[2] Using high pressure x-ray crystallography we can exert MOFs to GPa pressures, experimentally exploring the mechanical stability of MOFs to external pressure. By immersing the crystal in a hydrostatic medium, pressure is applied evenly to the crystal. On surrounding a porous MOF with a hydrostatic medium composed of small molecules (e.g. methanol), the medium can penetrate the MOF, resulting in medium-dependant compression. On compressing MOF-5 (Zn4O(BDC)3) using diethylformamide as a penetrating medium, the framework was shown to have an increased resistance to compression, becoming amorphous several orders of magnitude higher in pressure than observed on grinding the sample.[3] Here we present a high-pressure x-ray diffraction study on the UiO-based MOF UiO-67, and several new synthesised derivatives built from same metal node but with altered organic linkers, allowing us to study in a systematic way, the mechanical stability of the MOF, and its pressure dependence on both the linker, and pressure medium.

scholarly journals Structural studies of metal–organic frameworks under high pressure

2015 ◽  
Vol 71 (6) ◽  
pp. 587-607 ◽  
Author(s):  
Scott C. McKellar ◽  
Stephen A. Moggach
Keyword(s):  
High Pressure ◽  
Coordination Polymers ◽  
Metal Organic Frameworks ◽  
Structural Studies ◽  
Structural Effects ◽  
Elevated Pressures ◽  
High Pressure Studies ◽  
Metal Organic ◽  
The Subject ◽  
Chemical Response

Over the last 10 years or so, the interest and number of high-pressure studies has increased substantially. One area of growth within this niche field is in the study of metal–organic frameworks (MOFs or coordination polymers). Here we present a review on the subject, where we look at the structural effects of both non-porous and porous MOFs, and discuss their mechanical and chemical response to elevated pressures.

Hydrogen and Methane Adsorption in Metal−Organic Frameworks:  A High-Pressure Volumetric Study

2007 ◽  
Vol 111 (44) ◽  
pp. 16131-16137 ◽  
Author(s):  
Wei Zhou ◽  
Hui Wu ◽  
Michael R. Hartman ◽  
Taner Yildirim
Keyword(s):  
High Pressure ◽  
Metal Organic Frameworks ◽  
Methane Adsorption ◽  
Volumetric Study ◽  
Metal Organic

scholarly journals High-Pressure in Situ 129Xe NMR Spectroscopy: Insights into Switching Mechanisms of Flexible Metal–Organic Frameworks Isoreticular to DUT-49

2019 ◽  
Vol 31 (16) ◽  
pp. 6193-6201 ◽  
Author(s):  
Felicitas Kolbe ◽  
Simon Krause ◽  
Volodymyr Bon ◽  
Irena Senkovska ◽  
Stefan Kaskel ◽  
...  
Keyword(s):  
High Pressure ◽  
Nmr Spectroscopy ◽  
Metal Organic Frameworks ◽  
129Xe Nmr ◽  
Metal Organic ◽  
Flexible Metal

scholarly journals Zinc(ii) and cadmium(ii) amorphous metal–organic frameworks (aMOFs): study of activation process and high-pressure adsorption of greenhouse gases

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20137-20150
Author(s):  
Miroslav Almáši ◽  
Nikolas Király ◽  
Vladimír Zeleňák ◽  
Mária Vilková ◽  
Sandrine Bourrelly
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Greenhouse Gases ◽  
Metal Organic Frameworks ◽  
Amorphous Metal ◽  
Activation Process ◽  
Metal Organic ◽  
High Pressure Adsorption

Two novel amorphous metal–organic frameworks UPJS-13 and UPJS-14, constructed of Zn(ii)/Cd(ii) ions and extended tetrahedral linker were prepared, characterised and applied as adsorbents for carbon dioxide and methane.

scholarly journals Pressure Promoted Low-Temperature Melting of Metal-Organic Frameworks

2018 ◽  
Author(s):  
Remo N. Widmer ◽  
Giulio I. Lampronti ◽  
Simone Anzellini ◽  
Romain Gaillac ◽  
Stefan Farsang ◽  
...  
Keyword(s):  
High Pressure ◽  
Elevated Temperatures ◽  
Ambient Pressure ◽  
Metal Organic Frameworks ◽  
Temperature Phase ◽  
Guest Molecules ◽  
Complex Behaviour ◽  
Metal Organic ◽  
The Stability ◽  
Liquid States

Metal-organic frameworks (MOFs) are microporous materials with huge potential as host structures for chemical processes, including retention, catalytic reaction, or separation of guest molecules. Structural collapse at high-pressure, and unusual behaviours at elevated temperatures, such as melting and transitions to liquid states, have recently been observed in the family. Here, we show that the effect of the application of simultaneous high-pressure and -temperature on a MOF can be understood in terms of silicate analogues, with crystalline, amorphous and liquid states occurring across the pressure - temperature phase diagram. The response of ZIF-62, the MOF on which we focus, to simultaneous pressure and temperature reveals a complex behaviour with distinct high- and low- density amorphous phases occurring over different regions of the pressure-temperature space. In-situ powder X-ray diffraction, Raman spectroscopy and optical microscopy reveal that the stability of the liquid MOF-state expands significantly towards lower temperatures at intermediate, industrially achievable pressures. Our results imply a novel route to the synthesis of functional MOF glasses at low temperatures, avoiding decomposition upon heating at ambient pressure.

scholarly journals Metal–organic frameworks with rare topologies: lonsdaleite-type metal formates and their magnetic properties

CrystEngComm ◽  
2011 ◽  
Vol 13 (7) ◽  
pp. 2197 ◽  
Author(s):  
Hyunuk Kim ◽  
Yinyong Sun ◽  
Yonghwi Kim ◽  
Takashi Kajiwara ◽  
Masahiro Yamashita ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Metal Organic Frameworks ◽  
Metal Organic ◽  
Metal Formates

Just add water: for instant and scalable conversion of metal acetates to metal–organic frameworks

2020 ◽  
Vol 12 (38) ◽  
pp. 4635-4637
Author(s):  
Vijayan Srinivasapriyan
Keyword(s):  
High Pressure ◽  
Metal Organic Frameworks ◽  
Ambient Conditions ◽  
High Pressure And Temperature ◽  
Metal Organic ◽  
Scalable Synthesis

MOFs are typically synthesized under severe conditions that require high pressure and temperature. So herein we necessitated advances in their expeditious and scalable synthesis at ambient conditions.

Exploration of the mechanical behavior of metal organic frameworks UiO-66(Zr) and MIL-125(Ti) and their NH2 functionalized versions

2016 ◽  
Vol 45 (10) ◽  
pp. 4283-4288 ◽  
Author(s):  
Pascal. G. Yot ◽  
Ke Yang ◽  
Florence Ragon ◽  
Vladimir Dmitriev ◽  
Thomas Devic ◽  
...  
Keyword(s):  
High Pressure ◽  
Mechanical Behavior ◽  
Metal Organic Frameworks ◽  
Mechanical Stimuli ◽  
X Ray Diffraction ◽  
Structural Behaviour ◽  
X Ray ◽  
Metal Organic

The structural behaviour under mechanical stimuli of two metal organic frameworks, UiO-66(Zr) and MIL-125(Ti) and their amino-functionalized derivatives has been investigated by high-pressure powder X-ray diffraction up to 3.5 GPa.

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