The homonuclear dipolar coupling of a directly bonded 13 C-13 C pair has been used to create a dipolar double-quantum filter (D-DQF) to remove the natural-abundance 13 C background in 13 Cf 2 Hg rotationalecho double-resonance (REDOR) experiments. The most efficient version of this experiment has th
A Double-Quantum119Sn Rotational-Resonance Study
β Scribed by Robin Challoner; Angelika Sebald
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 146 KB
- Volume
- 122
- Category
- Article
- ISSN
- 1064-1858
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π SIMILAR VOLUMES
We present a new technique for double-quantum excitation in magic-angle-spinning solid-state NMR. The method involves (i) preparation of nonequilibrium longitudinal magnetization; (ii) mechanical excitation of zero-quantum coherence by spinning the sample at rotational resonance, and (iii) phase-coh
The dependence of the performance of a recently introduced pulse sequence to achieve double-quantum excitation under the n = 1 rotational-resonance condition (T. Karlsson, M. Eden, H. Luthman, and M. H. Levitt, 2000, J. Magn. Reson. 145, 95-107) on different spin-system properties is investigated by
## REDOR is a magic-angle spinning experiment for measuring internuclear distances between heteronuclear spin pairs. The basic principles of the REDOR technique are presented. The experimental requirements necessary for quantitative REDOR measurements are also provided.
We describe a new technique for double-quantum excitation in magic-angle-spinning NMR of powdered solids. The technique is designed to efficiently excite double-quantum coherence in the vicinity of a rotational resonance condition. The offset from rotational resonance allows the double-quantum filte
## Double-quantum filtration under rotational resonance MAS NMR conditions where the chemical shielding anisotropies involved exceed the differences in isotropic chemical shielding is considered by means of numerical simulations and 13 C MAS NMR experiments. The responses of two different pulse se