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Adiabatic passage Hartmann-Hahn cross polarization in NMR under magic angle sample spinning

✍ Scribed by S. Hediger; B.H. Meier; R.R. Ernst

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
733 KB
Volume
240
Category
Article
ISSN
0009-2614

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✦ Synopsis

We have recently demonstrated that polarization transfer using an adiabatic passage through the Hartmann-Hahn condition (APHH-CP) by a variation of the radio-frequency amplitude can substantially improve the transfer efficiency over Hartmann-Hahn cross polarization. Here we show that APHH-CF' can be combined with fast magic angle sample spinning (MAS). The heteronuclear dipolar order, established in the course of the transfer, can indeed be created and preserved.

πŸ“œ SIMILAR VOLUMES

Cross polarization under fast magic angl
Cross polarization under fast magic angle sample spinning using amplitude-modulated spin-lock sequences
✍ S. Hediger; B.H. Meier; R.R. Ernst πŸ“‚ Article πŸ“… 1993 πŸ› Elsevier Science 🌐 English βš– 703 KB

Amplitude-modulated cross-polarization (AMCP) schemes that can greatly improve the transfer efficiency under fast magic angle spinning are discussed. A novel class of pulse sequences (S-AMCP) that employ an amplitude-modulated spin-lock field on the s-spin channel only and cw irradiation on the I-sp