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Recoupled Polarization Transfer Heteronuclear 1H-13C Multiple-Quantum Correlation in Solids Under Ultra-Fast MAS

Recoupled Polarization Transfer Heteronuclear 1H-13C Multiple-Quantum Correlation in Solids Under Ultra-Fast MAS

K Saalwächter, R Graf, H W Spiess

J Magn Reson. 1999 Oct;140(2):471-6.

PMID: 10497052

Abstract:

A new approach for high-resolution solid-state heteronuclear multiple-quantum MAS NMR spectroscopy of dipolar-coupled spin-12 nuclei is introduced. The method is a heteronuclear chemical shift correlation technique of abundant spins, like 1H with rare spins, like 13C in natural abundance. High resolution is provided by ultra-fast MAS and high magnetic fields, high sensitivity being ensured by a direct polarization transfer from the abundant protons to 13C. In a rotor-synchronized variant, the method can be used to probe heteronuclear through-space proximities, while the heteronuclear dipolar coupling constant can quantitatively be determined by measuring multiple-quantum spinning-sideband patterns. By means of recoupling, even weak heteronuclear dipolar interactions are accessible. The capabilities of the technique are demonstrated by measurements on crystalline L-tyrosine hydrochloride salt.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP16870432	L-Tyrosine hydrochloride		16870-43-2	Price

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