Design of a triple quantum coherence excitation scheme for protons in solid state NMR. Leskes, M. & Vega, S. The Journal of Chemical Physics, 130(12):124506, March, 2009. Paper doi abstract bibtex We present a rf scheme designed to excite triple quantum (TQ) coherences for proton solid state NMR. This recoupling scheme is based on the phase modulated Lee Goldburg sequence combined with echo pulses and applied nonsynchronous with the magic angle spinning period. Based on the effective bimodal Floquet Hamiltonian we optimize the conditions for TQ coherence excitation. Numerical simulations are used to further adjust the recoupling conditions as well as define the sequence limitations. Experimental TQ filtered one-dimensional spectra and two-dimensional correlations of TQ to single quantum coherences are presented for standard amino acids. These results are compared with the crystal structures showing that this scheme can aid in resonance assignments and in resolving local spin topologies.
@article{Leskes2009a,
title = {Design of a triple quantum coherence excitation scheme for protons in solid state {NMR}},
volume = {130},
issn = {0021-9606},
url = {http://www.ncbi.nlm.nih.gov/pubmed/19334850},
doi = {10.1063/1.3098354},
abstract = {We present a rf scheme designed to excite triple quantum (TQ) coherences for proton solid state NMR. This recoupling scheme is based on the phase modulated Lee Goldburg sequence combined with echo pulses and applied nonsynchronous with the magic angle spinning period. Based on the effective bimodal Floquet Hamiltonian we optimize the conditions for TQ coherence excitation. Numerical simulations are used to further adjust the recoupling conditions as well as define the sequence limitations. Experimental TQ filtered one-dimensional spectra and two-dimensional correlations of TQ to single quantum coherences are presented for standard amino acids. These results are compared with the crystal structures showing that this scheme can aid in resonance assignments and in resolving local spin topologies.},
number = {12},
journal = {The Journal of Chemical Physics},
author = {Leskes, Michal and Vega, Shimon},
month = mar,
year = {2009},
pmid = {19334850},
pages = {124506},
}
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