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Errors in chemical shift tensor components and orientation in the molecular frame as obtained from MAS NMR spinning sideband analysis

✍ Scribed by Alejandro C. Olivieri

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 89 KB
Volume: 11
Category: Article
ISSN: 0926-2040
DOI: 10.1016/s0926-2040(98)00035-6

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✦ Synopsis

It is shown how to calculate random errors in chemical shift tensor components and in the Euler angles which fix the orientation of the sigma tensor in the molecular frame, as obtained from spinning sideband analysis of MAS NMR spectra of powdered solids, when heteronuclear dipolar coupling interactions occur in a two spin system. The procedure was applied to experimental data corresponding to the chemical shift tensor of a carbon-13 bonded to a phosphorus-31 nucleus. Clues are given concerning the experimental variables to be set in order to obtain the desired accuracy in the orientation angles.

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✍ Alejandro C. Olivieri 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 134 KB

15N Chemical Shift Tensor Magnitude and

15N Chemical Shift Tensor Magnitude and Orientation in the Molecular Frame of Uracil Determined via MAS NMR

✍ Jörg Leppert; Bert Heise; Ramadurai Ramachandran 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 138 KB

The potential of heteronuclear MAS NMR spectroscopy for the characterization of (15)N chemical shift (CS) tensors in multiply labeled systems has been illustrated, in one of the first studies of this type, by a measurement of the chemical shift tensor magnitude and orientation in the molecular frame