scholarly journals Guest-dependent negative thermal expansion in a lanthanide-based metal–organic framework

CrystEngComm ◽  
2019 ◽  
Vol 21 (35) ◽  
pp. 5292-5298 ◽  
Author(s):  
Andrzej Gładysiak ◽  
Seyed Mohamad Moosavi ◽  
Lev Sarkisov ◽  
Berend Smit ◽  
Kyriakos C. Stylianou
Keyword(s):  
Thermal Expansion ◽  
Metal Organic Framework ◽  
Negative Thermal Expansion ◽  
Metal Organic ◽  
Organic Framework

A lanthanide-based metal–organic framework (MOF) named SION-2, displays strong and tuneable uniaxial negative thermal expansion (NTE).

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

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 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

Anisotropic thermal expansion in a metal–organic framework

2014 ◽  
Vol 70 (3) ◽  
pp. 595-601 ◽  
Author(s):  
Solveig Røgild Madsen ◽  
Nina Lock ◽  
Jacob Overgaard ◽  
Bo Brummerstedt Iversen
Keyword(s):  
Thermal Expansion ◽  
Weak Interactions ◽  
Metal Organic Framework ◽  
Linear Thermal Expansion ◽  
Negative Thermal Expansion ◽  
Orthorhombic Space Group ◽  
Cell Parameters ◽  
Anisotropic Thermal Expansion ◽  
Metal Organic ◽  
Organic Framework

Ionothermal reaction between MnII(acetate)2·4H2O and 1,3,5-benzenetricarboxylic acid (H3BTC) in either of the two ionic liquids 1-ethyl-3-methylimidazolium bromide (EMIMBr) and 1-ethyl-3-methylimidazolium tosylate (EMIMOTs) resulted in the formation of the new metal–organic framework (MOF) EMIM[MnIIBTC] (BTC = 1,3,5-benzenetricarboxylate). The compound crystallizes in the orthorhombic space groupPbcawith unit-cell parameters ofa= 14.66658 (12),b= 12.39497 (9),c= 16.63509 (14) Å at 100 K. Multi-temperature single-crystal (15–340 K) and powder X-ray diffraction studies (100–400 K) reveal strongly anisotropic thermal expansion properties. The linear thermal expansion coefficients, αL(l), attain maximum values at 400 K along thea- andb-axis, with αL(a) = 115 × 10−6 K−1and αL(b) = 75 × 10−6 K−1. At 400 K a negative thermal expansion coefficient of −40 × 10−6 K−1is observed along thec-axis. The thermal expansion is coupled to a continuous deformation of the framework, which causes the structure to expand in two directions. Due to the rigidity of the linker, the expansion in theabplane causes the network to contract along thec-axis. Hirshfeld surface analysis has been used to describe the interaction between the framework structure and the EMIM cation that resides within the channel. This reveals a number of rather weak interactions and one governing hydrogen-bonding interactions.

Sign in / Sign up

Export Citation Format

Share Document