scholarly journals Chemical Shift Tensor Analysis of Uniaxially Oriented Cellulose Microcrystals

2019 ◽  
Vol 68 (8) ◽  
pp. 643-648
Author(s):  
Ryosuke KUSUMI ◽  
Fumiko KIMURA ◽  
Masahisa WADA ◽  
Tsunehisa KIMURA ◽  
Kenzo DEGUCHI ◽  
...  
Keyword(s):  
Chemical Shift ◽  
Tensor Analysis ◽  
Chemical Shift Tensor

Intermolecular Interactions of Xe Atoms Confined in One-dimensional Nanochannels of Tris(o-phenylenedioxy)cyclotriphosphazene as Studied by High-pressure 129Xe NMR

2003 ◽  
Vol 58 (12) ◽  
pp. 727-734 ◽  
Author(s):  
Hirokazu Kobayashi ◽  
Takahiro Ueda ◽  
Keisuke Miyakubo ◽  
Taro Eguchi
Keyword(s):  
High Pressure ◽  
Nmr Spectroscopy ◽  
Chemical Shift ◽  
Pressure Dependence ◽  
Average Distance ◽  
Chemical Shift Tensor ◽  
Axially Symmetric ◽  
One Dimensional ◽  
129Xe Nmr ◽  
The One

The pressure dependence of the 129Xe chemical shift tensor confined in the Tris(o-phenylenedioxy) cyclotriphosphazene (TPP) nanochannel was investigated by high-pressure 129Xe NMR spectroscopy. The observed 129Xe spectrum in the one-dimensional TPP nanochannel (0.45 nm in diameter) exhibits a powder pattern broadened by an axially symmetric chemical shift tensor. As the pressure increases from 0.02 to 7.0 MPa, a deshielding of 90 ppm is observed for the perpendicularcomponent of the chemical shift tensor δ⊥, whereas a deshielding of about 30 ppm is observed for the parallel one, δ‖. This suggests that the components of the chemical shift tensor, δ‖ and δ⊥, are mainly dominated by the Xe-wall and Xe-Xe interaction, respectively. Furthermore, the effect of helium, which is present along with xenon gas, on the 129Xe chemical shift is examined in detail. The average distance between the Xe atoms in the nanochannel is estimated to be 0.54 nm. This was found by using δ⊥ at the saturated pressure of xenon, and comparing the increment of the chemicalshift value in δ⊥ to that of a β -phenol/Xe compound.

Magic-Angle-Turning Experiments for Measuring Chemical-Shift-Tensor Principal Values in Powdered Solids

1995 ◽  
Vol 113 (2) ◽  
pp. 210-222 ◽  
Author(s):  
J.Z. Hu ◽  
W. Wang ◽  
F. Liu ◽  
M.S. Solum ◽  
D.W. Alderman ◽  
...  
Keyword(s):  
Chemical Shift ◽  
Chemical Shift Tensor ◽  
Magic Angle

Cluster Analysis of13C Chemical Shift Tensor Principal Values in Polycyclic Aromatic Hydrocarbons

2001 ◽  
Vol 105 (31) ◽  
pp. 7468-7472 ◽  
Author(s):  
Julio C. Facelli ◽  
Bret K. Nakagawa ◽  
Anita M. Orendt ◽  
Ronald J. Pugmire
Keyword(s):  
Cluster Analysis ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Chemical Shift ◽  
Aromatic Hydrocarbons ◽  
Chemical Shift Tensor ◽  
Polycyclic Aromatic

Anisotropy of the Fluorine Chemical Shift Tensor in Xenon Tetrafluoride

1963 ◽  
Vol 39 (8) ◽  
pp. 2109-2110 ◽  
Author(s):  
R. Blinc ◽  
I. Zupančič ◽  
S. Maričič ◽  
Z. Veksli
Keyword(s):  
Chemical Shift ◽  
Chemical Shift Tensor
Sign in / Sign up

Export Citation Format

Share Document