The theory of DQF-COSY NMR experiments. II. Phase modulation of the signal: A simple relationship between the coefficients needed to calculate the COSY and DQF-COSY NMR spectra of an AX spin system of quadrupolar nuclei

2010 ◽  
Vol 36A (6) ◽  
pp. 394-399 ◽  
Author(s):  
P. Kempgens
Keyword(s):  
Spin System ◽  
Phase Modulation ◽  
Nmr Spectra ◽  
Quadrupolar Nuclei ◽  
Simple Relationship ◽  
Cosy Nmr

Gerüstumlagerungen bei einem Yliddiylphosphan-Tetrameren

1998 ◽  
Vol 53 (11) ◽  
pp. 1285-1293 ◽  
Author(s):  
Skeletal Rearrangements ◽  
Ylidediylphosphane Tetramer ◽  
Hans-Peter Schrödel ◽  
Alfred Schmidpeter ◽  
Heinrich Nöth
Keyword(s):  
Spin System ◽  
Nmr Spectra ◽  
Amino Group ◽  
Counter Ion ◽  
Singly Charged

Condensation of the bis(trimethylsilyl)ylide Ph3PC(SiMe3)2 with PX3 (X = Cl, Br) yields the ionic tetramers 4a,b of ylidediyl-halophosphanes. Their cations (Ph3PC)4P4X3+ possess a tetraphosphabicyclo[2.2.2]octane (or tetraphospha-barrelane) skeleton ([AC]3BD spin system in 31P NMR spectra). Reaction of 4a with AlCl3 or GaCl3 converts the singly charged cation into the tetracation (Ph3PC)4P44+ having a cubane structure ([AB]4 spin system in the 31P NMR spectum). SbCl5 oxidizes 4a to give the dication (Ph3PC)4P4Cl42+ (counter ion: SbCl52-) with the barrelane skeleton either preserved (7) or rearranged into a tetraphospha-bicylco[3.3.0]- octane structure 8. In the latter case the dication contains a central diphosphanedionium bridge. Replacement of a chloro-substituent in 4a by an amino group also gives rise to a further dissociation and a concomitant rearrangement. The resulting dications (Ph3PC)4P4NR2Cl2+ possess a tetraphospha-bicyclo-[3.2.1]octane structure (with eight nonequivalent phosphorus atoms).

scholarly journals Rapid acquisition of wideline MAS solid-state NMR spectra with fast MAS, proton detection, and dipolar HMQC pulse sequences

2016 ◽  
Vol 18 (36) ◽  
pp. 25284-25295 ◽  
Author(s):  
Aaron J. Rossini ◽  
Michael P. Hanrahan ◽  
Martin Thuo
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Spectra ◽  
Pulse Sequences ◽  
Quadrupolar Nuclei ◽  
Proton Detection ◽  
Rapid Acquisition ◽  
Half Integer ◽  
Fast Mas

Fast MAS and proton detection are applied to rapidly acquire wideline solid-state NMR spectra of spin-1/2 and half-integer quadrupolar nuclei.

Quantum state tomography for quadrupolar nuclei using global rotations of the spin system

2007 ◽  
Vol 126 (15) ◽  
pp. 154506 ◽  
Author(s):  
J. Teles ◽  
E. R. deAzevedo ◽  
R. Auccaise ◽  
R. S. Sarthour ◽  
I. S. Oliveira ◽  
...  
Keyword(s):  
Quantum State ◽  
Spin System ◽  
Quadrupolar Nuclei ◽  
Quantum State Tomography ◽  
State Tomography

MAS NMR spectra of quadrupolar nuclei in disordered solids: The Czjzek model

2008 ◽  
Vol 192 (2) ◽  
pp. 244-251 ◽  
Author(s):  
Jean-Baptiste d’Espinose de Lacaillerie ◽  
Christian Fretigny ◽  
Dominique Massiot
Keyword(s):  
Nmr Spectra ◽  
Mas Nmr ◽  
Quadrupolar Nuclei ◽  
Disordered Solids
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