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Orientational Information from TEDOR Spectral Sidebands

✍ Scribed by Jörg Leppert; Bert Heise; Ramadurai Ramachandran

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
195 KB
Volume
19
Category
Article
ISSN
0926-2040

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✦ Synopsis

In a dipolar-coupled spin-1/2 network of the type 15 N1-13 C-15 N2, an assessment of the sensitivity of the N → C and C → N TEDOR sideband intensities to the Euler angles defining the orientation of the two heteronuclear dipolar vectors in the 13 C and 15 N chemical shift (CS) tensor principal axes system has been carried out via numerical calculations. The results clearly indicate the potential of TEDOR MAS NMR spectroscopy for the characterization of the CS tensor orientation in the molecular frame. The efficacy of the method has been experimentally illustrated by TEDOR studies on a polycrystalline sample of [1 3 -15 N 2 2 -13 C]uracil, which is one of the four bases in RNA.

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