doi: 10.1016/j.jmr.2006.12.003.
Epub 2006 Dec 26.
Symmetry-based recoupling of proton chemical shift anisotropies in ultrahigh-field solid-state NMR
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- PMID: 17188919
- DOI: 10.1016/j.jmr.2006.12.003
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Symmetry-based recoupling of proton chemical shift anisotropies in ultrahigh-field solid-state NMR
J Magn Reson.
2007 Mar.
Abstract
A two-dimensional NMR experiment for estimating proton chemical shift anisotropies (CSAs) in solid powders under magic-angle spinning conditions is demonstrated in which 1H CSAs are reintroduced with a symmetry-based recoupling sequence while the individual proton sites are resolved according to their isotropic chemical shifts by magic-angle spinning (MAS) or combined rotation and multiple pulse (CRAMPS) homonuclear decoupling. The experiments where carried out on an ultrahigh-field solid-state NMR instrument (900 MHz 1H frequency) which leads to increased resolution and reliability of the measured 1H CSAs. The experiment is expected to be important for investigating hydrogen bonding in solids.
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