scholarly journals Ethane diffusion in mixed linker zeolitic imidazolate framework-7-8 by pulsed field gradient NMR in combination with single crystal IR microscopy

2018 ◽  
Vol 20 (37) ◽  
pp. 23967-23975 ◽  
Author(s):  
Samuel Berens ◽  
Christian Chmelik ◽  
Febrian Hillman ◽  
Jörg Kärger ◽  
Hae-Kwon Jeong ◽  
...  
Keyword(s):  
Single Crystal ◽  
Field Gradient ◽  
Experimental Conditions ◽  
Zeolitic Imidazolate Framework ◽  
Pulsed Field Gradient Nmr ◽  
Pulsed Field ◽  
Ir Microscopy ◽  
Pfg Nmr

Pulsed field gradient (PFG) NMR was used in combination with single crystal IR microscopy (IRM) to study diffusion of ethane inside crystals of a mixed linker zeolitic imidazolate framework (ZIF) of the type ZIF-7-8 under comparable experimental conditions.

Diffusion coefficient of lithium ions in garnet-type Li6.5La3Zr1.5Ta0.5O12 single crystal probed by 7Li pulsed field gradient-NMR spectroscopy

2018 ◽  
Vol 327 ◽  
pp. 18-26 ◽  
Author(s):  
Arunkumar Dorai ◽  
Naoaki Kuwata ◽  
Reiji Takekawa ◽  
Junichi Kawamura ◽  
Kunimitsu Kataoka ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Nmr Spectroscopy ◽  
Single Crystal ◽  
Field Gradient ◽  
Lithium Ions ◽  
Pulsed Field Gradient Nmr ◽  
Pulsed Field

Robustness of Methane Diffusion in Geometrically Restricted Molecular Sieve Pores

1994 ◽  
Vol 366 ◽  
Author(s):  
Sriram S. Nivarthi ◽  
H. Ted Davis ◽  
Alon V. McCormick
Keyword(s):  
Field Gradient ◽  
Molecular Sieve ◽  
Pore Space ◽  
Pulsed Field Gradient Nmr ◽  
Pulsed Field ◽  
Zeolite Nay ◽  
Self Diffusion ◽  
Methane Diffusion ◽  
Pfg Nmr ◽  
Sieve Pores

ABSTRACTNMR measurements of sorbate mobility in zeolites are especially attractive because of their capability of measuring multicomponent and anisotropic self-diffusion. We have recently reported the application of the pulsed field gradient NMR technique using very large zeolite crystals to study how easily methane can diffuse when we attempt to slow its migration by crowding the pore space. Here we analyze the implications of these PFG NMR experiments involving (i) ethylene blocking of methane in zeolite NaY; and (ii) methane molecules trying to pass one another in the molecular sieve A1PO4-5.

scholarly journals Molecular and Ionic Diffusion in Ion Exchange Membranes and Biological Systems (Cells and Proteins) Studied by NMR

Membranes ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 385
Author(s):  
Vitaliy I. Volkov ◽  
Alexander V. Chernyak ◽  
Irina A. Avilova ◽  
Nikita A. Slesarenko ◽  
Daria L. Melnikova ◽  
...  
Keyword(s):  
Field Gradient ◽  
Diffusion Processes ◽  
Spatial Scales ◽  
Water Soluble ◽  
Fullerene Derivative ◽  
Wide Field ◽  
Pulsed Field Gradient Nmr ◽  
Pulsed Field ◽  
Self Diffusion ◽  
Pfg Nmr

The results of NMR, and especially pulsed field gradient NMR (PFG NMR) investigations, are summarized. Pulsed field gradient NMR technique makes it possible to investigate directly the partial self-diffusion processes in spatial scales from tenth micron to millimeters. Modern NMR spectrometer diffusive units enable to measure self-diffusion coefficients from 10−13 m2/sec to 10−8 m2/sec in different materials on 1 H, 2 H, 7 Li, 13 C, 19 F, 23 Na, 31 P, 133 Cs nuclei. PFG NMR became the method of choice for reveals of transport mechanism in polymeric electrolytes for lithium batteries and fuel cells. Second wide field of application this technique is the exchange processes and lateral diffusion in biological cells as well as molecular association of proteins. In this case a permeability, cell size, and associate lifetime could be estimated. The authors have presented the review of their research carried out in Karpov Institute of Physical Chemistry, Moscow, Russia; Institute of Problems of Chemical Physics RAS, Chernogolovka, Russia; Kazan Federal University, Kazan, Russia; Korea University, Seoul, South Korea; Yokohama National University, Yokohama, Japan. The results of water molecule and Li+, Na+, Cs+ cation self-diffusion in Nafion membranes and membranes based on sulfonated polystyrene, water (and water soluble) fullerene derivative permeability in RBC, casein molecule association have being discussed.

Ionicity of deep eutectic solvents by Walden plot and pulsed field gradient nuclear magnetic resonance (PFG-NMR)

2020 ◽  
Vol 22 (44) ◽  
pp. 25760-25768
Author(s):  
Yaqing Wang ◽  
Wenjun Chen ◽  
Qi Zhao ◽  
Guizhen Jin ◽  
Zhimin Xue ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Transport Properties ◽  
Field Gradient ◽  
Deep Eutectic Solvents ◽  
Pulsed Field Gradient Nmr ◽  
Pulsed Field ◽  
Nmr Method ◽  
Pfg Nmr ◽  
Walden Plot

The transport properties and ionicity of DESs were investigated by using Walden plot and the pulsed field gradient NMR method.

scholarly journals Diffusion of methyl oleate in hierarchical micro-/mesoporous TS-1-based catalysts probed by PFG NMR spectroscopy

RSC Advances ◽  
2018 ◽  
Vol 8 (68) ◽  
pp. 38941-38944 ◽  
Author(s):  
Muslim Dvoyashkin ◽  
Nicole Wilde ◽  
Jürgen Haase ◽  
Roger Gläser
Keyword(s):  
Nmr Spectroscopy ◽  
Methyl Oleate ◽  
Field Gradient ◽  
Pulsed Field Gradient Nmr ◽  
Pulsed Field ◽  
Direct Assessment ◽  
Pfg Nmr

Direct assessment of methyl oleate diffusion confined to nanopores of TS-1-based catalysts by means of pulsed field gradient NMR.

Controlling Gas Selectivity in Molecular Porous Liquids by Tuning the Cage Window Size

2019 ◽  
Author(s):  
Benjamin Egleston ◽  
Konstantin V. Luzyanin ◽  
Michael C. Brand ◽  
Rob Clowes ◽  
Michael E. Briggs ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Synthesis ◽  
Field Gradient ◽  
Window Size ◽  
Standard Approach ◽  
Porous Solids ◽  
Pulsed Field Gradient Nmr ◽  
Pulsed Field ◽  
Cage Molecules ◽  
Gas Selectivity

Control of pore window size is the standard approach for tuning gas selectivity in porous solids. Here, we present the first example where this is translated into a molecular porous liquid formed from organic cage molecules. Reduction of the cage window size by chemical synthesis switches the selectivity from Xe-selective to CH<sub>4</sub>-selective, which is understood using <sup>129</sup>Xe, <sup>1</sup>H, and pulsed-field gradient NMR spectroscopy.

Controlling Gas Selectivity in Molecular Porous Liquids by Tuning the Cage Window Size

2019 ◽  
Author(s):  
Benjamin Egleston ◽  
Konstantin V. Luzyanin ◽  
Michael C. Brand ◽  
Rob Clowes ◽  
Michael E. Briggs ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Synthesis ◽  
Field Gradient ◽  
Window Size ◽  
Standard Approach ◽  
Porous Solids ◽  
Pulsed Field Gradient Nmr ◽  
Pulsed Field ◽  
Cage Molecules ◽  
Gas Selectivity

Control of pore window size is the standard approach for tuning gas selectivity in porous solids. Here, we present the first example where this is translated into a molecular porous liquid formed from organic cage molecules. Reduction of the cage window size by chemical synthesis switches the selectivity from Xe-selective to CH<sub>4</sub>-selective, which is understood using <sup>129</sup>Xe, <sup>1</sup>H, and pulsed-field gradient NMR spectroscopy.

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