Fluorine Patterning in Room-Temperature Fluorinated Graphite Determined by Solid-State NMR and DFT

2013 ◽  
Vol 117 (15) ◽  
pp. 7940-7948 ◽  
Author(s):  
Anastasia Vyalikh ◽  
Lyubov G. Bulusheva ◽  
Galina N. Chekhova ◽  
Dmitry V. Pinakov ◽  
Alexander V. Okotrub ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Room Temperature ◽  
Fluorinated Graphite

Primary Adsorption Sites of Light Alkanes in Multivariate UiO-66 at Room Temperature as Revealed by Solid-State NMR

2020 ◽  
Vol 124 (6) ◽  
pp. 3738-3746 ◽  
Author(s):  
Yuqing Xiao ◽  
Yueying Chu ◽  
Shenhui Li ◽  
Yongchao Su ◽  
Jing Tang ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Room Temperature ◽  
Light Alkanes ◽  
Adsorption Sites

Room temperature activation of methane over Zn modified H-ZSM-5 zeolites: Insight from solid-state NMR and theoretical calculations

2012 ◽  
Vol 3 (10) ◽  
pp. 2932 ◽  
Author(s):  
Jun Xu ◽  
Anmin Zheng ◽  
Xiumei Wang ◽  
Guodong Qi ◽  
Jihu Su ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Room Temperature ◽  
Theoretical Calculations ◽  
Temperature Activation

In situ solid-state NMR studies of Ca3SiO5: hydration at room temperature and at elevated temperatures using 29Si enrichment

1994 ◽  
Vol 29 (15) ◽  
pp. 3926-3940 ◽  
Author(s):  
A. R. Brough ◽  
C. M. Dobson ◽  
I. G. Richardson ◽  
G. W. Groves
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Nmr Studies

Room temperature stable zinc carbonyl complex formed in zeolite ZSM-5 and its hydrogenation reactivity: a solid-state NMR study

2015 ◽  
Vol 51 (44) ◽  
pp. 9177-9180 ◽  
Author(s):  
Guodong Qi ◽  
Qiang Wang ◽  
Yueying Chu ◽  
Jun Xu ◽  
Anmin Zheng ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Room Temperature ◽  
Carbonyl Complex ◽  
Nmr Study

The structure and reactivity of a room temperature stable zinc carbonyl complex in Zn-modified H-ZSM-5 zeolite were revealed.

Room temperature CO oxidation catalysed by supported Pt nanoparticles revealed by solid-state NMR and DNP spectroscopy

2019 ◽  
Vol 9 (14) ◽  
pp. 3743-3752 ◽  
Author(s):  
Vytautas Klimavicius ◽  
Sarah Neumann ◽  
Sebastian Kunz ◽  
Torsten Gutmann ◽  
Gerd Buntkowsky
Keyword(s):  
Solid State ◽  
Co Oxidation ◽  
Dynamic Nuclear Polarization ◽  
Platinum Nanoparticles ◽  
Solid State Nmr ◽  
Room Temperature ◽  
Nuclear Polarization ◽  
Pt Nanoparticles ◽  
Support Materials

A series of 1 and 2 nm sized platinum nanoparticles deposited on different support materials are investigated by solid-state NMR combined with dynamic nuclear polarization (DNP).

scholarly journals Facile, Room-Temperature 17O Enrichment of Zeolite Frameworks Revealed by Solid-State NMR Spectroscopy

2019 ◽  
Vol 142 (2) ◽  
pp. 900-906 ◽  
Author(s):  
Suzi M. Pugh ◽  
Paul A. Wright ◽  
David J. Law ◽  
Nicholas Thompson ◽  
Sharon E. Ashbrook
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Room Temperature ◽  
Solid State Nmr Spectroscopy

scholarly journals Variable-Temperature Multinuclear Solid-State NMR Study of Oxide Ion Dynamics in Fluorite-Type Bismuth Vanadate and Phosphate Solid Electrolytes

2018 ◽  
Author(s):  
Matthew Dunstan ◽  
David M. Halat ◽  
Matthew Tate ◽  
Ivana Radosavljevic Evans ◽  
Clare Grey
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Spectra ◽  
Room Temperature ◽  
Variable Temperature ◽  
Spin Lattice Relaxation ◽  
Ion Dynamics ◽  
Ionic Motion ◽  
Vt Nmr ◽  
Oxide Ion

<p>In this study, we employ a multinuclear, variable-temperature NMR spectroscopy approach to characterise and measure oxide ionic motion in the V- and P-substituted bismuth oxide materials Bi0.913V0.087O1.587, Bi0.852V0.148O1.648 and Bi0.852P0.148O1.648, previously shown to have excellent ionic conduction properties. Two main <sup>17</sup>O NMR resonances are distinguished for each material, corresponding to O in the Bi–O and V–O/P–O sublattices. Using variable-temperature (VT) measurements ranging from room temperature to 923 K, the ionic motion experienced by these different sites has then been characterised, with coalescence of the two environments in the V-substituted materials clearly indicating a conduction mechanism facilitated by exchange between the two sublattices. The lack of this coalescence in the P-substituted material indicates a different mechanism, confirmed by <sup>17</sup>O T1 (spin-lattice relaxation) NMR experiments to be driven purely by vacancy motion in the Bi–O sublattice. <sup>51</sup>V and <sup>31</sup>P VT-NMR experiments show high rates of tetrahedral rotation even at room temperature, increasing with heating. An additional VO4 environment appears in <sup>17</sup>O and <sup>51</sup>V NMR spectra of the more highly V-substituted Bi0.852V0.148O1.648, which we ascribe to differently distorted VO4 tetrahedral units that disrupt the overall ionic motion, consistent both with linewidth analysis of the 17O VT-NMR spectra and experimental results of Kuang <i>et al.</i> showing a lower oxide ionic conductivity in this material compared to Bi0.913V0.087O1.587 (<i>Chem. Mater. </i>2012, 24, 2162). This study shows solid-state NMR is particularly well suited to understanding connections between local structural features and ionic mobility, and can quantify the evolution of oxide-ion dynamics with increasing temperature.</p>

scholarly journals Anisotropic nuclear spin interactions in H 2 O@C 60 determined by solid-state NMR

2013 ◽  
Vol 371 (1998) ◽  
pp. 20120102 ◽  
Author(s):  
M. Concistrè ◽  
S. Mamone ◽  
M. Denning ◽  
G. Pileio ◽  
X. Lei ◽  
...  
Keyword(s):  
Solid State ◽  
Nuclear Spin ◽  
Solid State Nmr ◽  
Room Temperature ◽  
Chemical Shift Anisotropy ◽  
Water Molecules ◽  
Dipole Interactions ◽  
Nmr Study ◽  
Spin Interactions ◽  
Principal Axes

We report a solid-state NMR study of the anisotropic nuclear spin interactions in H 2 O@C 60 at room temperature. We find evidence of significant dipole–dipole interactions between the water protons, and also a proton chemical shift anisotropy (CSA) interaction. The principal axes of these interaction tensors are found to be perpendicular. The magnitude of the CSA is too large to be explained by a model in which the water molecules are partially aligned with respect to an external axis. The evidence indicates that the observed CSA is caused by a distortion of the geometry or electronic structure of the fullerene cages, in response to the presence of the endohedral water.

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