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. Author manuscript; available in PMC: 2011 Jun 23.
Published in final edited form as: J Am Chem Soc. 2010 Jun 23;132(24):8255–8257. doi: 10.1021/ja102932n

Figure 2.

Figure 2

A-B. Spin-exchanged SLF pulse sequences for spectroscopic assignment in solid-state NMR of oriented samples. The t1 dimension is evolved using either the frequency-switched Lee-Goldburg scheme (A) or SAMPI4 (B), followed by the z-filter and the proton-mediated spin exchange, during which the proton rf amplitude is set at 10%-25% above the Hartmann-Hahn matching condition. C. Homonuclear 15N-15N exchange employing mismatched Hartmann-Hahn magnetization transfer. The intermediate pulse before the z-filter selects either real or imaginary component of the t1 evolution.