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Spatial Localized Double-Quantum NMR Heteronuclear Coherence Transfer in Solids by Indirect Detection

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Demco D., Ardelean I.

Acta Physica Polonica A

1996

vol. 89

issue 5-6

699-714

The spatial localization of the double-quantum NMR heteronuclear coherence transfer in solids, in the presence of a main magnetic field gradient is analyzed. The indirect detection procedure by which the dipolar order of the abundant spin system with I=1/2 is transferred to the double-quantum coherence of the quadrupole nucleus with S=1 and back to the I-spin dipolar order is considered. The slice profile and the cross-relaxation rates are evaluated as a function of the experimental parameters and the sample relevant NMR quantities. The possibility to use this slice selective procedure for imaging and volume localized spectroscopy of quadrupole nuclei in high magnetic fields is discussed.

Spatial Localized Single Quantum Heteronuclear Polarization Transfer

100%

Demco D. E., Ardelean I.

Acta Physica Polonica A

1994

vol. 86

issue 3

407-425

The existence of a strong spatial localization for the efficiency of cross-polarization by single quantum transition in the presence of a main field gradient was evidenced . The case of the solids with strong dipolar interactions has been analyzed. The slice profile of the transferred polarization was evaluated for different cross-polarization procedures. The spatial localization is superior as compared with the spin-locking slice selection method.

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2 Acta Physica Polonica A

1 1996

1 1994

2 Ardelean I.

1 Demco D.

1 Demco D. E.

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Spatial Localized Double-Quantum NMR Heteronuclear Coherence Transfer in Solids by Indirect Detection

Spatial Localized Single Quantum Heteronuclear Polarization Transfer