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6.11 XPOLEDIT1—Solids Spectral Editing
6.11 XPOLEDIT1—Solids Spectral Editing
XPOLEDIT1 provides for spectral editing of CH3, CH2, 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 31 is a diagram of the XPOLEDIT1 sequence.
cntct
p3
p4
(tpwrm)
at
Tx
pw
cntct
p3
p4
(dipolr)
(crossp)
d1
Dec
A
C
Figure 31. XPOLDIT1 Pulse Sequence
Applicability
XPOLEDIT1 is available on UNITYINOVA 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.
Parameters
XPOLEDIT1 makes use of the UNITYINOVA and UNITYplus parameters tpwr, tpwrm,
dpwr, cppwr, dipolr, crossp, dblvl2, pw and cntct. See page 63 for a
description of these parameters.
p3 is the depolarization time, in microseconds. The phase of the proton channel is reversed.
p4 is the repolarization time, in microseconds.
References
Sangil, R.; Bildsoe, H.; Jacobsen, H. J. J. Magn. Reson. 1994, 107 (Series A), 67.
01-999162-00 A0800
VNMR 6.1C User Guide: Solid-State NMR
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