Magic angle spinning NMR spectra

Figure 6 Solid state static and magic-angle spinning NMR spectra of a-Mg2V2(>7.

Figure 4. Carbon-13 cross-polarization, magic-angle spinning NMR spectra from an acrylic-melamine (A) and acrylic-urethane (B) coating. (Reproduced with permission from ref. 28. Copyright 1986 Elsevier Sequoia.)...

Figure 8 C magic angle spinning NMR spectra of the dimer phase at 185 K. The small peak at 78 ppm is due to sp carbons [43].

A1 magic-angle-spinning NMR spectra were recorded at a spectrometer frequency of 104.2 MHz on a Chemagnetics 400 MHz spectrometer. The samples were spun at 10 kHz and... 

Fig. 1.3 C-magic-angle spinning NMR spectra of vinylidene formed on alumina-supported palladium (a), and after exposure to Shown as an inset is a mass spectrum...

The cross-polarization magic-angle-spinning NMR spectra of three structures (51-53) have shown the keto-hydroxy tautomerism in compound 51 but not in 52 and 53. This was confirmed by a single-crystal X-ray diffraction study of compound 51. The results revealed that the distinct molecules in the unit cell are linked by intermolecular hydrogen bonds. ... 

H. J. Jakobsen, J. Skibsted, H. Bildspe and N. C. Nielsen, Magic-angle spinning NMR spectra of satellite transitions for quadrupolar nuclei in solids. J. Magn. Reson., 1989, 85, 173—180. 

Magic angle spinning NMR spectra with variable cross polarization contact times were obtained on the intact, non-extracted sediments. The time-dependent spectra reveal subtle differences in organic carbon with depth differences not observed in single contact experiments. Dlpolar-dephased spectra of these same sediments indicate the presence of substantial amounts of substituted aromatic/olefinic carbons which are rapidly altered with depth. 

In general, MAS (magic angle spinning) NMR spectra also take longer to record, as spin relaxation is slow. This is particularly true for spin-V2 nuclei such as silicon, where relaxation times of between 120 to 600 s... 

Fig. 2.26 An example of NMR used to probe local environment of a polymer in a blend/ N CPMAS (cross-polarization, magic angle spinning) NMR spectra of polyamide-6 in a blend with polyketone. PA-6 in a PK/PA 6 4 blend (a) shows primarily (70 %) its a-crystal phase, whereas in its pure form (b) PA-6 shows a 60 % y and 40 % a crystal (Data from Asano, Chap. 5 in Cheng et al. 2011)...

Fig. 6.4.8. Cross-polarization/magic-angle spinning NMR spectra of cutin from the fruit peel of Malus pumila suberin from the bark of Pseudotsuga menziesiiy suberin from the periderm of the tuber of Solarium tuberosum and the residue left after L1A1H4 depolymerization of S. tuberosum suberin. (Spectra courtesy of Regional NMR Center, Fort Collins, Colorado.)...

Davies NA, Harris RK and Olivieri AC (1996) The effects of interplay between quadrupolar, dipolar and shielding tensors on magic-angle spinning NMR spectra shapes of spinning sidebands. Molecular Physics 87 669-677. 

Carpenter TA, Klinowski J, Tennakoon DTB, Smith CJ, Edwards DC. Sealed capsules for convenient acquasition of variable temperature controlled-atmosphere magic-angle-spinning NMR spectra of solids. 

Spaniol TP, Kubo A, Terao T (1999) Resolution enhancmnent of magic-angle spinning NMR spectra for paramagnetic solids by zero-quantum NMR. Mol Phys 96 827-834... 

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