Eft spectrometer users have published several
journal articles to inform our existing and
potential users how the Eft might be used in the
undergraduate teaching laboratory.
Implementation and use of Selective Shaped
Pulses on Lower-end NMR Spectrometers
Abstract
The
implementation of selective shaped pulses as
pulse-width modulated DANTE pulse trains on an
Anasazi Eft-90 NMR spectrometer, an extremely
popular instrument among institutions with modest
research programs, is presented. The excitation
frequency profiles obtained for several types of
shaped DANTE pulse trains, including square,
triangular, trapezoidal, Gaussian, and
half-Gaussian, are presented and compared to
theoretical calculations, and their usefulness is
further showcased in a series of selective
population inversion (SPI) experiments. Comparison
of these results to those obtained from analogous
experiments recorded using conventional shaped
pulses on a state-of-the-art NMR spectrometer
indicates that the shaped DANTE pulse trains perform
remarkably well. Their practical and theoretical
limitations, as well as general guidelines for their
implementation in other spectrometers, are
discussed.
Daniel Lim* and Guillermo Moyna†
University of the Sciences in Philadelphia
Department of Chemistry & Biochemistry, 600 South
43rd Street, Philadelphia, PA 19104-4495 |
215-596-8526
g.moyna@usip.edu
