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13C CP/MAS NMR of a 13C2H residual dipolar coupled pair

✍ Scribed by Paul Jonsen; Alejandro C. Olivieri; Steven F. Tanner

Book ID
104357799
Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
427 KB
Volume
7
Category
Article
ISSN
0926-2040

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✦ Synopsis

When a spin-1/2 nucleus is dipolar coupled to a spin-1 nucleus, the spectrum of the spin-1/2 nucleus can be split into an asymmetric doublet in magic-angle spinning experiments. When the spin-1/2 nucleus is 13C and the spin-1 nucleus is 2H there is also the possibility of this splitting being modified by the indirect (J) coupling. 13C-2H residual dipolar couplings are seen because of the large full dipolar coupling of the nucleus pair. However, this has implications on the spinning speed used in the CP/MAS NMR experiment and the intensities of the isotropic 13C dipolar coupled to 2H. The calculation of side band intensities for slow spinning when the dipolar, quadrupolar and chemical shift tensors are axially symmetric and coaxial is discussed.

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