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. Author manuscript; available in PMC: 2011 Dec 7.
Published in final edited form as: Phys Chem Chem Phys. 2010 Oct 8;12(45):14873–14883. doi: 10.1039/c0cp00795a

Figure 7.

Figure 7

(a) 2D 15N CSA/1H-15N DIP correlation spectrum of N-acetyl-valine (NAV), extracted from the 3D R1817/R1425 experiment along the 15N isotropic chemical shift. The spectrum was recorded with 64 scans, 16 t1 and 32 t2 increments. The sample was spun at a MAS frequency of 10 kHz. (b) Best-fit simulated correlation spectrum, obtained with βNH(δzz) = 25°±5° and αNH(δxx) = 30°±10°, using the same acquisition and processing parameters as in the NMR experiment in (a). (c) Simulated correlation spectrum with βNH(δzz) = 0° and αNH (δxx) = 0°. (d) Simulated correlation spectrum with βNH(δzz) = 90° and αNH(δxx) = 0°.