Pileio, G., Concistre, M., McLean, N., Gansmulller, A., Brown, R.C.D. and Levitt, M.H.
Analytical theory of gamma-encoded double-quantum recoupling sequences in solid-state nuclear magnetic resonance
Journal of Magnetic Resonance, 186, (1), . (doi:10.1016/j.jmr.2007.01.009).
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Many important double-quantum recoupling techniques in solid-state NMR are classified as being ?-encoded. This means that the phase of the double-quantum effective Hamiltonian, but not its amplitude, depends on the third Euler angle defining the orientation of the molecular spin system in the frame of the magic-angle-spinning rotor. In this paper, we provide closed analytical solutions for the dependence of the powder-average double-quantum-filtered signal on the recoupling times, within the average Hamiltonian approximation for ?-encoded pulse sequences. The validity of the analytical solutions is tested by numerical simulations. The internuclear distance in a 13C2-labelled retinal is estimated by fitting the analytical curves to experimental double-quantum data.
|Digital Object Identifier (DOI):
||angle-spinning nmr, symmetry, fresnel, polarization transfer, homonuclear rotary resonance, cross-polarization, magic-angle-spinning, symmetry-based recoupling, proton-enhanced nmr, principles, solid-state nmr, recoupling, pulse sequence, rotating solids, spectroscopy, dilute spins
||31 Jul 2008
||16 Apr 2017 17:47
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