scholarly journals Elucidating the Variable-Temperature Mechanical Properties of a Negative Thermal Expansion Metal–Organic Framework

2018 ◽  
Vol 10 (25) ◽  
pp. 21079-21083 ◽  
Author(s):  
Jurn Heinen ◽  
Austin D. Ready ◽  
Thomas D. Bennett ◽  
David Dubbeldam ◽  
Raymond W. Friddle ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Expansion ◽  
Variable Temperature ◽  
Metal Organic Framework ◽  
Negative Thermal Expansion ◽  
Metal Organic ◽  
Organic Framework

Proposal for a material with negative thermal expansion

2016 ◽  
Vol 30 (32) ◽  
pp. 1650238
Author(s):  
Mikrajuddin Abdullah
Keyword(s):  
Thermal Expansion ◽  
Glass Transition ◽  
Transition Temperature ◽  
Metal Organic Framework ◽  
Negative Thermal Expansion ◽  
Lennard Jones ◽  
Model Predictions ◽  
Metal Organic ◽  
Organic Framework

I propose a model of a material that exhibits negative thermal expansion (NTE) properties and criteria for the occurrence of linear and volumetric NTE. I derived the criteria for an arbitrary force between rigid units in the material. These criteria are also discussed specifically for the Lennard–Jones (6–12) potential and in more detail for metal–organic framework (MOF) materials comprising rigid units connected by organic linkers. Qualitatively, the model predictions can explain some observed results. Surprisingly, the model can produce equations for the transition temperature from NTE to positive thermal expansion (PTE), [Formula: see text] K, which is exactly the same as the temperature at which the glass transition begins to occur in most polymers, i.e., [Formula: see text] K.

Negative Thermal Expansion in the Metal-Organic Framework Material Cu3(1,3,5-benzenetricarboxylate)2

2008 ◽  
Vol 120 (46) ◽  
pp. 9061-9064 ◽  
Author(s):  
Yue Wu ◽  
Atsushi Kobayashi ◽  
Gregory J. Halder ◽  
Vanessa K. Peterson ◽  
Karena W. Chapman ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Metal Organic Framework ◽  
Negative Thermal Expansion ◽  
Metal Organic ◽  
Organic Framework

Zero thermal expansion in metal-organic framework with imidazole dicarboxylate ligands

2021 ◽  
Author(s):  
Qilong Gao ◽  
Yixin Jiao ◽  
Gang Li
Keyword(s):  
Thermal Expansion ◽  
Structural Model ◽  
Layer Structure ◽  
Variable Temperature ◽  
Metal Organic Framework ◽  
Strong Relationship ◽  
Honeycomb Structure ◽  
Axis Direction ◽  
Metal Organic ◽  
Organic Framework

Abstract Exploring new abnormal thermal expansion materials is important to understand the nature of thermal expansion. Metal-Organic Framework (MOF) with unique structure flexibility is ideal material to study the thermal expansion. This work adopts the high-resolution variable-temperature powder X-ray diffraction to investigate the structure and intrinsic thermal expansion in Sr-MOF ([Sr(DMPhH2IDC)2]n). It has the unique honeycomb structure with 1D channels along c-axis direction, the a-b plane displays layer structure. The thermal expansion behavior has strong relationship with the structure, ZTE appears in the a-b plane and large PTE along c-axis direction. The possible mechanism is that the a/b layers have enough space for the transverse thermal vibration of polydentate ligands, while along the c-axis direction is not. This work not only reports one interesting zero thermal expansion material, but also provides new understand for thermal expansion mechanism from the perspective of structural model.

scholarly journals Reversible switching between positive and negative thermal expansion in a metal–organic framework DUT-49

2020 ◽  
Vol 8 (39) ◽  
pp. 20420-20428
Author(s):  
Bikash Garai ◽  
Volodymyr Bon ◽  
Anastasia Efimova ◽  
Martin Gerlach ◽  
Irena Senkovska ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Single Crystal ◽  
Metal Organic Framework ◽  
Negative Thermal Expansion ◽  
X Ray Diffraction ◽  
Guest Molecules ◽  
X Ray ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
Organic Framework

Reversible switching between positive and negative thermal expansion of a mesoporous metal-organic framework DUT-49 has been demonstrated and studied by synchrotron single-crystal X-ray diffraction with different guest molecules in the pores.

scholarly journals Tuning the Negative Thermal Expansion Behavior of the Metal–Organic Framework Cu3BTC2 by Retrofitting

2019 ◽  
Vol 141 (26) ◽  
pp. 10504-10509 ◽  
Author(s):  
Christian Schneider ◽  
David Bodesheim ◽  
Michael G. Ehrenreich ◽  
Valentina Crocellà ◽  
János Mink ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Metal Organic Framework ◽  
Negative Thermal Expansion ◽  
Thermal Expansion Behavior ◽  
Expansion Behavior ◽  
Metal Organic ◽  
Organic Framework

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.

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