Magic Angle Spinning: Effects of Quadrupolar Nuclei on Spin-1/2 Spectra

2007 ◽  
Author(s):  
Robin K. Harris
Keyword(s):  
Magic Angle Spinning ◽  
Magic Angle ◽  
Quadrupolar Nuclei ◽  
Angle Spinning

Two-dimensional magic-angle spinning isotropic reconstruction sequences for quadrupolar nuclei

1996 ◽  
Vol 6 (1) ◽  
pp. 73-83 ◽  
Author(s):  
D. Massiot ◽  
B. Touzo ◽  
D. Trumeau ◽  
J.P. Coutures ◽  
J. Virlet ◽  
...  
Keyword(s):  
Magic Angle Spinning ◽  
Magic Angle ◽  
Quadrupolar Nuclei ◽  
Two Dimensional ◽  
Angle Spinning

Multiple-quantum magic-angle spinning and dynamic-angle spinning NMR spectroscopy of quadrupolar nuclei

1997 ◽  
Vol 8 (1) ◽  
pp. 1-16 ◽  
Author(s):  
S.H. Wang ◽  
Z. Xu ◽  
J.H. Baltisberger ◽  
L.M. Bull ◽  
J.F. Stebbins ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Quadrupolar Nuclei ◽  
Multiple Quantum ◽  
Angle Spinning ◽  
Dynamic Angle

scholarly journals Improved Magnetization Transfers among Quadrupolar Nuclei in Two-Dimensional Homonuclear Correlation NMR Experiments Applied to Inorganic Network Structures

Molecules ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 337 ◽  
Author(s):  
Yang Yu ◽  
Philipp Keil ◽  
Michael Ryan Hansen ◽  
Mattias Edén
Keyword(s):  
Chemical Shifts ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Quadrupolar Nuclei ◽  
Single Quantum ◽  
Dipolar Recoupling ◽  
Open Framework ◽  
Fast Mas ◽  
Angle Spinning ◽  
Inorganic Network

We demonstrate that supercycles of previously introduced two-fold symmetry dipolar recoupling schemes may be utilized successfully in homonuclear correlation nuclear magnetic resonance (NMR) spectroscopy for probing proximities among half-integer spin quadrupolar nuclei in network materials undergoing magic-angle-spinning (MAS). These (SR2 2 1 ) M , (SR2 4 1 ) M , and (SR2 8 1 )M recoupling sequences with M = 3 and M = 4 offer comparably efficient magnetization transfers in single-quantum–single-quantum (1Q–1Q) correlation NMR experiments under moderately fast MAS conditions, as demonstrated at 14.1 T and 24 kHz MAS in the contexts of 11 B NMR on a Na 2 O–CaO–B 2 O 3 –SiO 2 glass and 27 Al NMR on the open framework aluminophosphate AlPO-CJ19 [(NH 4 ) 2 Al 4 (PO 4 ) 4 HPO 4 · H 2 O]. Numerically simulated magnetization transfers in spin–3/2 pairs revealed a progressively enhanced tolerance to resonance offsets and rf-amplitude errors of the recoupling pulses along the series (SR2 2 1 ) M < (SR2 4 1 ) M < (SR2 8 1 )M for increasing differences in chemical shifts between the two nuclei. Nonetheless, for scenarios of a relatively minor chemical-shift dispersions ( ≲ 3 kHz), the (SR2 2 1 )M supercycles perform best both experimentally and in simulations.

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