High-Pressure in Situ129Xe NMR Spectroscopy and Computer Simulations of Breathing Transitions in the Metal–Organic Framework Ni2(2,6-ndc)2(dabco) (DUT-8(Ni))

2011 ◽  
Vol 133 (22) ◽  
pp. 8681-8690 ◽  
Author(s):  
Herbert C. Hoffmann ◽  
Bassem Assfour ◽  
Fanny Epperlein ◽  
Nicole Klein ◽  
Silvia Paasch ◽  
...  
2021 ◽  
Vol 23 (7) ◽  
pp. 4277-4286
Author(s):  
S. V. Chuvikov ◽  
E. A. Berdonosova ◽  
A. Krautsou ◽  
J. V. Kostina ◽  
V. V. Minin ◽  
...  

Pt-Catalyst plays a key role in hydrogen adsorption by Cu-BTC at high pressures.


Author(s):  
Rebecca Smith ◽  
Iñigo J. Vitórica-Yrezábal ◽  
Adrian Hill ◽  
Lee Brammer

A metal–organic framework (MOF) with one-dimensional channels of approximately hexagonal cross-section [Ag 2 (O 2 CCF 2 CF 2 CO 2 )(TMP)] 1 (TMP =2,3,5,6-tetramethylpyrazine) has been synthesized with MeOH filling the channels in its as-synthesized form as [Ag 2 (O 2 CCF 2 CF 2 CO 2 )(TMP)]· n (MeOH) 1-MeOH ( n  = 1.625 by X-ray crystallography). The two types of ligand connect columns of Ag(I) centres in an alternating manner, both around the channels and along their length, leading to an alternating arrangement of hydrocarbon (C–H) and fluorocarbon (C–F) groups lining the channel walls, with the former groups projecting further into the channel than the latter. MeOH solvent in the channels can be exchanged for a variety of arene guests, ranging from xylenes to tetrafluorobenzene, as confirmed by gas chromatography, 1 H nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis and 13 C cross-polarization magic angle spinning NMR spectroscopy. Alkane and perfluoroalkane guests, however, do not enter the channels. Although exhibiting some stability under a nitrogen atmosphere, sufficient to enable crystal structure determination, the evacuated MOF 1 is unstable for periods of more than minutes under ambient conditions or upon heating, whereupon it undergoes an irreversible solid-state transformation to a non-porous polymorph 2 , which comprises Ag 2 (O 2 CCF 2 CF 2 CO 2 ) coordination layers that are pillared by TMP ligands. This transformation has been followed in situ by powder X-ray diffraction and shown to proceed via a crystalline intermediate. This article is part of the themed issue ‘Coordination polymers and metal–organic frameworks: materials by design’.


2012 ◽  
Vol 9 (1/2) ◽  
pp. 18 ◽  
Author(s):  
Stephen A. Moggach ◽  
Alexander J. Graham ◽  
Anna Muszkiewicz ◽  
Carole A. Morrison

2020 ◽  
Vol 12 (9) ◽  
pp. 10983-10992 ◽  
Author(s):  
Jérémy Dhainaut ◽  
Mickaële Bonneau ◽  
Ryota Ueoka ◽  
Kazuyoshi Kanamori ◽  
Shuhei Furukawa

2017 ◽  
Vol 121 (36) ◽  
pp. 19938-19945 ◽  
Author(s):  
Jun Xu ◽  
E. S. Merijn Blaakmeer ◽  
Andrew S. Lipton ◽  
Thomas M. McDonald ◽  
Yifei Michelle Liu ◽  
...  

2018 ◽  
Vol 47 (37) ◽  
pp. 12993-13005 ◽  
Author(s):  
Abhishek V. Chitnis ◽  
Himal Bhatt ◽  
Miroslaw Mączka ◽  
Mukul N. Deo ◽  
Nandini Garg

Shrinking of the cavity formed by the MnO6 octahedra and formate linkers, initiates the distortion of the formate network in DMAMnF and results in ordering of the DMA+ cation, leading to a crystal to crystal phase transition at high pressure.


2020 ◽  
Vol 22 (26) ◽  
pp. 14465-14470
Author(s):  
Munehiro Inukai ◽  
Takuya Kurihara ◽  
Yasuto Noda ◽  
Weiming Jiang ◽  
Kiyonori Takegoshi ◽  
...  

We performed high-resolution solid-state NMR analyses for CO2 molecules adsorbed in MOF-74 under high pressure conditions.


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