Varian Solid-State NMR - XPOLEDIT1-Solids Spectral Editing; Figure 40. XPOLDIT1 Pulse Sequence

6.11 XPOLEDIT1—Solids Spectral Editing
01-999162-00 C0402 VNMR 6.1C User Guide: Solid-State NMR 98
Parameters
VACP uses the
UNITY
INOVA and UNITYplus parameters tpwr, tpwrm, dpwr, cppwr,
dipolr, dblvl2, pw, and cntct. See page 85 for a description of these parameters.
vacp is an array of linear modulator settings to be used during cross-polarization. After
vacp is set, set array=''. The command da is inoperative when array=''. Use the
vacplist macro instead to display the vacp array.
Reference
Peersen, O.; Wu, X.; Kustanovich, I.; Smith, S. O. J. Magn. Reson. 1993, 104 (Series
A), 334.
6.11 XPOLEDIT1—Solids Spectral Editing
XPOLEDIT1 provides for spectral editing of CH
3
, CH
2
, CH and C carbons by use of
differences in their cross polarization properties. The sequence provides a 180
° phase shift
during the contact time (depolarization) followed by a return to the original phase
(repolarization). Individual carbon types can be nulled with appropriate delays p3 and p4
and spectral editing can be achieved by addition and subtraction of subspectra obtained
with the different delays. Figure 40 is a diagram of the XPOLEDIT1 sequence.
Applicability
XPOLEDIT1 is available on
UNITY
INOVA and UNITYplus and present in userlib.
Macro
The macro xpoledit1 converts a parameter set obtained with XPOLAR or XPOLAR1
for XPOLEDIT1. Power levels and pulse widths are retained.
Figure 40. XPOLDIT1 Pulse Sequence
pw
cntct
cntct
(tpwrm)
(crossp)
(dipolr)
Tx
Dec
at
d1
AC
p3
p4
p3
p4