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À propos de : Proton to Carbon-13 INEPT in Solid-State NMR Spectroscopy        

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  • Proton to Carbon-13 INEPT in Solid-State NMR Spectroscopy
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  • A refocused INEPT through-bond coherence transfer technique is demonstrated for NMR ofrigid organic solids and is shown to provide a valuable building block for the development of NMR correlationexperiments in biological solids. The use of efficient proton homonuclear dipolar decoupling in combinationwith a direct spectral optimization procedure provides minimization of the transverse dephasing ofcoherences and leads to very efficient through-bond 1H−13C INEPT transfer for crystalline organiccompounds. Application of this technique to 2D heteronuclear correlation spectroscopy leads to up to afactor of 3 increase in sensitivity for a carbon-13 enriched sample in comparison to standard through-bondexperiments and provides excellent selectivity for one-bond transfer. The method is demonstrated on amicrocrystalline sample of the protein Crh (2 × 10.4 kDa).
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