scholarly journals On the use of radio‐frequency offsets for improving double quantum homonuclear dipolar recoupling of half‐integer quadrupolar nuclei

2021 ◽  
Author(s):  
Nghia Tuan Duong ◽  
Daniel Lee ◽  
Frédéric Mentink‐Vigier ◽  
Olivier Lafon ◽  
Gaël De Paëpe
Keyword(s):  
Radio Frequency ◽  
Double Quantum ◽  
Quadrupolar Nuclei ◽  
Dipolar Recoupling ◽  
Half Integer ◽  
Frequency Offsets

Radio-frequency-mediated dipolar recoupling among half-integer quadrupolar spins

2000 ◽  
Vol 112 (13) ◽  
pp. 5902-5909 ◽  
Author(s):  
Marc Baldus ◽  
David Rovnyak ◽  
Robert G. Griffin
Keyword(s):  
Radio Frequency ◽  
Dipolar Recoupling ◽  
Half Integer

Estimating internuclear distances between half-integer quadrupolar nuclei by central-transition double-quantum sideband NMR spectroscopy

2011 ◽  
Vol 89 (7) ◽  
pp. 892-899 ◽  
Author(s):  
Andreas Brinkmann ◽  
Mattias Edén
Keyword(s):  
Nmr Spectroscopy ◽  
Dipolar Coupling ◽  
Double Quantum ◽  
Quadrupolar Nuclei ◽  
X Ray Diffraction ◽  
Nmr Spectrum ◽  
Spin Pair ◽  
Half Integer ◽  
Central Transition ◽  
Internuclear Distances

We demonstrate the estimation of homonuclear dipolar couplings, and thereby internuclear distances, between half-integer spin quadrupolar nuclei by central-transition (CT) double-quantum (2Q) sideband nuclear magnetic resonance (NMR) spectroscopy. It is shown that the rotor-encoded sideband amplitudes from CT 2Q coherences in the indirect dimension of the two-dimensional NMR spectrum are sensitive probes of the magnitude of the homonuclear dipolar coupling, but are significantly less affected by other NMR parameters such as the magnitudes and orientations of the electric field gradient tensors. Experimental results of employing the [Formula: see text] recoupling sequence to the 11B spin pair of bis(catecholato)diboron resulted in an estimation of the internuclear B–B distance as (169.6 ± 3) pm, i.e., with a relative uncertainty of ±2%, and in excellent agreement with the distance of 167.8 pm determined by single-crystal X-ray diffraction.

scholarly journals Central-transition double-quantum sideband NMR spectroscopy of half-integer quadrupolar nuclei: estimating internuclear distances and probing clusters within multi-spin networks

2014 ◽  
Vol 16 (15) ◽  
pp. 7037-7050 ◽  
Author(s):  
Andreas Brinkmann ◽  
Mattias Edén
Keyword(s):  
Nmr Spectroscopy ◽  
Double Quantum ◽  
Quadrupolar Nuclei ◽  
Spin Networks ◽  
Half Integer ◽  
Central Transition ◽  
Internuclear Distances

Clusters within quadrupolar spin networks are probed and internuclear distances between quadrupolar nuclei are estimated by central-transition double-quantum sideband NMR spectroscopy.

Chapter 4. Two-dimensional Methods for Half-integer Quadrupolar Nuclei

2018 ◽  
pp. 97-133 ◽  
Author(s):  
F. Pourpoint ◽  
O. Lafon ◽  
R. Gauvin ◽  
J.-P. Amoureux ◽  
L. Delevoye
Keyword(s):  
Quadrupolar Nuclei ◽  
Two Dimensional ◽  
Half Integer

scholarly journals Efficient transfer of DNP‐enhanced 1 H magnetization to half‐integer quadrupolar nuclei in solids at moderate spinning rate

2021 ◽  
Author(s):  
Hiroki Nagashima ◽  
Julien Trébosc ◽  
Yoshihiro Kon ◽  
Olivier Lafon ◽  
Jean‐Paul Amoureux
Keyword(s):  
Quadrupolar Nuclei ◽  
Half Integer ◽  
Efficient Transfer

NMR Characterization of Half-integer Quadrupolar Nuclei in Solids

1992 ◽  
Vol 47 (5) ◽  
pp. 665-674
Author(s):  
J. P. Amoureux
Keyword(s):  
Quadrupolar Nuclei ◽  
Rf Amplifier ◽  
Quadrupole Interactions ◽  
Half Integer ◽  
Nmr Characterization ◽  
Powder Samples ◽  
Fixed Axis ◽  
Spinning Speed

Abstract This article describes a few aspects of NMR characterization of half-integer quadrupolar nuclei in powder samples which are either static or rotating around one fixed axis (M.A.S. and V.A.S. techniques). The simultaneous occurence of C.S.A. and quadrupole interactions with possible noncoincident tensors is discussed. Two experimental limitations are taken into accout: the sample spinning speed and the RF-amplifier power

Sign in / Sign up

Export Citation Format

Share Document