scholarly journals New insights into phase distribution, phase composition and disorder in Y2(Zr,Sn)2O7 ceramics from NMR spectroscopy

2015 ◽  
Vol 17 (14) ◽  
pp. 9049-9059 ◽  
Author(s):  
Sharon E. Ashbrook ◽  
Martin R. Mitchell ◽  
Scott Sneddon ◽  
Robert F. Moran ◽  
Massey de los Reyes ◽  
...  
Keyword(s):  
Phase Composition ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Phase Distribution ◽  
Atomic Scale ◽  
Solid State Nmr Spectroscopy ◽  
Distribution Phase ◽  
Insight Into

The use of solid-state NMR spectroscopy to provide new insight into the composition and atomic-scale disorder in pyrochlore-based ceramics produces a very different picture to that obtained using other techniques.

scholarly journals The acidic nature of “NMR-invisible” tri-coordinated framework aluminum species in zeolites

2019 ◽  
Vol 10 (43) ◽  
pp. 10159-10169 ◽  
Author(s):  
Shaohui Xin ◽  
Qiang Wang ◽  
Jun Xu ◽  
Yueying Chu ◽  
Pengfei Wang ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Zeolite Catalysts ◽  
Probe Molecules ◽  
Solid State Nmr Spectroscopy ◽  
Acidic Nature ◽  
Insight Into

A unique insight into the acidic nature of the tri-coordinated framework aluminum (AlFR) in H-ZSM-5 zeolite catalysts has been provided using multi-nuclear and multi-dimensional solid-state NMR spectroscopy in conjunction with TMPO probe molecules.

scholarly journals Spying on the boron–boron triple bond using spin–spin coupling measured from 11B solid-state NMR spectroscopy

2015 ◽  
Vol 6 (6) ◽  
pp. 3378-3382 ◽  
Author(s):  
Frédéric A. Perras ◽  
William C. Ewing ◽  
Theresa Dellermann ◽  
Julian Böhnke ◽  
Stefan Ullrich ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Triple Bond ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Solid State Nmr Spectroscopy ◽  
Spin Spin Coupling ◽  
Insight Into

Boron–boron J coupling constants provide new insight into the nature of the boron–boron triple bond.

Probing Interfaces in Complex Oxide Heterostructures via 17O Solid State NMR Spectroscopy

2020 ◽  
Author(s):  
Michael Hope ◽  
Bowen Zhang ◽  
Bonan Zhu ◽  
David M. Halat ◽  
Judith L. Driscoll ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Density Functional ◽  
Interfacial Structure ◽  
Atomic Scale ◽  
Random Structure ◽  
Isotopic Enrichment ◽  
Solid State Nmr Spectroscopy ◽  
Lift Off

The determination of the atomic-scale structure of a solid–solid interface is a major outstanding problem in the physical sciences, the structure controlling many properties including stability, ionic and electronic transport, magnetism, multiferroicity and superconductivity. NMR spectroscopy is sensitive to local structure but is not typically sufficiently sensitive or selective to observe solid–solid interfaces. In this work, CeO<sub>2</sub>–SrTiO<sub>3</sub> vertically aligned nanocomposite (VAN) thin films are studied and, by combining selective isotopic enrichment with a lift-off technique to remove the substrate, the <sup>17</sup>O NMR signal from single atomic layer interfaces can clearly be seen. The interfacial structure is solved by calculating the NMR parameters using density functional theory combined with random structure searching. By performing the isotopic enrichment at variable temperatures, the superior oxide-ion conductivity of the VAN films compared to the bulk materials is shown to arise in part from enhanced oxygen mobility at this interface; oxygen motion at the interface is further identified from <sup>17</sup>O relaxometry experiments. These results highlight the information that can be obtained on interfacial structure and dynamics with solid-state NMR spectroscopy, in this and other nanostructured systems, our methodology being generally applicable to overcome sensitivity limitations in thin-film studies.

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