130 (327) BRUKER BIOSPIN User Manual Version 002
Modifications of FSLG HETCOR
Figure 9.2. HETCOR Using Windowless Phase Ramps
The figure above shows the HETCOR using windowless phase ramped shapes
for proton homonuclear decoupling during evolution. The carrier was placed in the
middle of the proton spectrum and the usual carrier ridge was suppressed by
phase cycling (Leskes et al., Chem.
Phys. Lett.). This allows reduced measure-
ment times. Pmlghet, wpmlghet, dumbohet and edumbohet should give rather
similar spectra.
Table 9.1. Acquisition Parameters for pmlg-HETCOR (on tyrosine-HCl)
Parameter Value Comments
pulprog pmlghet Using phase ramps.
nuc1 13C
o1p 100 ppm
nuc2 1H
cnst20 80-100000 Proton spin nutation frequency with PL13.
cnst24 1000-3000 Place carrier within proton spectrum for evolution.
pl1 Power level channel 1 for contact pulse.
pl12 Power level channel 2 TPPM/SPINAL decoupling.
pl13 Power level channel 2 PMLG decoupling.
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