Comparative studies of phase-cycling schemes for multiple pi-pulse sequences.
Recently, a new phase cycling scheme was introduced by this laboratory for use in biological solid-state NMR experiments involving multiple pi-pulses with characteristics that suggested it may enhance the sensitivity of these kind of experiments (Y. Li and J. N. S. Evans, 1995, Chem. Phys. Lett. 241, 79 and Erratum, 1995, ibid. 246, 527; Y. Li and J. N. S. Evans, 1996, J. Magn. Reson. B 111, 296). The new sequence followed the supercycled concept proposed a decade ago for heteronuclear decoupling experiments. In this paper, more detailed experiments demonstrate that the claim of enhanced sensitivity was unfounded, and in fact the supercycle proposed differs little from the established XY-8 and XY-16 based supercycles.
Igumenova
T I
TI
Department of Biochemistry and Biophysics, Washington State University, Pullman, Washington, 99164-4660, USA.
Mitchell
D J
DJ
Evans
J N
JN
D009682:Magnetic Resonance Spectroscopy / Q000379:methods*