Determination of Cα Chemical Shift Tensor Orientation in Peptides by Dipolar-Modulated Chemical Shift Recoupling NMR Spectroscopy

2002 ◽  
Vol 124 (11) ◽  
pp. 2730-2738 ◽  
Author(s):  
Xiaolan Yao ◽  
Mei Hong
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Shift ◽  
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.

scholarly journals Determination of 15N Chemical Shift Anisotropy from a Membrane-Bound Protein by NMR Spectroscopy

2012 ◽  
Vol 116 (24) ◽  
pp. 7181-7189 ◽  
Author(s):  
Manoj Kumar Pandey ◽  
Subramanian Vivekanandan ◽  
Shivani Ahuja ◽  
Kumar Pichumani ◽  
Sang-Choul Im ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Shift ◽  
Chemical Shift Anisotropy ◽  
Membrane Bound

The129Xe Chemical Shift Tensor in a Silicalite Single Crystal from Hyperpolarized129Xe NMR Spectroscopy

2001 ◽  
Vol 123 (42) ◽  
pp. 10399-10400 ◽  
Author(s):  
Victor V. Terskikh ◽  
Igor L. Moudrakovski ◽  
Hongbin Du ◽  
Christopher I. Ratcliffe ◽  
John A. Ripmeester
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Shift ◽  
Single Crystal ◽  
Chemical Shift Tensor

scholarly journals Determination of relative tensor orientations by γ-encoded chemical shift anisotropy/heteronuclear dipolar coupling 3D NMR spectroscopy in biological solids

2010 ◽  
Vol 12 (45) ◽  
pp. 14873 ◽  
Author(s):  
Guangjin Hou ◽  
Sivakumar Paramasivam ◽  
In-Ja L. Byeon ◽  
Angela M. Gronenborn ◽  
Tatyana Polenova
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Shift ◽  
Dipolar Coupling ◽  
Chemical Shift Anisotropy ◽  
3D Nmr ◽  
Biological Solids

Determination of Multiple Torsion-Angle Constraints in U−13C,15N-Labeled Peptides:  3D1H−15N−13C−1H Dipolar Chemical Shift NMR Spectroscopy in Rotating Solids

2002 ◽  
Vol 124 (40) ◽  
pp. 11908-11922 ◽  
Author(s):  
Chad M. Rienstra ◽  
Morten Hohwy ◽  
Leonard J. Mueller ◽  
Christopher P. Jaroniec ◽  
Bernd Reif ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Shift ◽  
Torsion Angle

Chemical Shift Nonequivalence of Enantiomers of Amino Acid Derivatives in 1H NMR and 19F NMR Spectroscopy Induced by L-Chirasil- Val.

1992 ◽  
Vol 47 (7) ◽  
pp. 1034-1036 ◽  
Author(s):  
Bernhard Koppenhoefer ◽  
Michael Hummel
Keyword(s):  
Amino Acid ◽  
Nmr Spectroscopy ◽  
Chemical Shift ◽  
Methyl Esters ◽  
Enantiomeric Purity ◽  
Peak Splitting ◽  
H Nmr ◽  
Acid Methyl ◽  
Amino Acid Methyl Esters

Enantiomers of N-trifluoroacetyl-amino acid methyl esters in CC14 solution, after addition of the chiral polysiloxane (L)-Chirasil-Val, display a chemical shift nonequivalence ΔΔδ in both 1H NMR and 19F NMR spectroscopy. The effects found for the leucine and valine derivatives can be correlated with the thermodynamic parameters of interaction in the undiluted system, as determined by gas chromatography. In CDC13 solution, no peak splitting was observed. The method is potentially useful for the determination of the enantiomeric purity of substrates of low volatility.

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