Powder pattern recoupling at 10 kHz spinning speed applied to cellulose.

Effective powder pattern recoupling by pi-pulses at spinning speeds up to 10kHz has been introduced. In a 2D experiment, the static chemical shift spectra of the indirect dimension were separated by the isotropic values of the direct dimension. Sufficient high spinning speeds ensured optimal exploitation of spectral intensities. This experiment was used to extract the 13C chemical shift tensor values of native Cellulose I and regenerated Cellulose II.