Varian Solid-State NMR - Figure 37. MASEXCH1 Pulse Sequence

Chapter 6. Solid-State NMR Experiments
91 VNMR 6.1C User Guide: Solid-State NMR 01-999162-00 C0402
Parameters
MASEXCH1makes use of the
UNITY
INOVA and UNITYplus parameters tpwr, tpwrm,
dpwr, cppwr, dipolr, crossp, dblvl2, pw and cntct. See page 85 for a
description of these parameters.
pwx is the observe 90
° pulse in microseconds.
phase is 1,2 for P type, the Veeman experiment, for transformation with
wft2d(1,0,0,1,0,-1,1,0) and 1,2,3,4 for the phase sensitive spectrum
according to the reference for transformation with wft2d(1,0,0,1,1,0,0,
-1,0,-1,1,0,0,1,1,0). The phase-sensitive spectrum is the sum of a Veeman
experiment, phase=1,2 and a time-reversed experiment, phase=3,4.
mix is the mixing time, in seconds. For phase=1,2,3,4 the minimum mixing time is
equal to (ni-1/sw1). For phase=1,2 the minimum mixing time is 0.0.
sync='y' to run with rotor synchronization. sync='n' to run unsynchronized (normal)
NOESY.
nt is a minimum of 16.
Reference
Luz, Z.; Spiess, H. W.; Titman, J. J. Israel J. of Chem. 1992, 32, 145.
Figure 37. MASEXCH1 Pulse Sequence
pw
cntct
cntct
(tpwrm)
(crossp)
(dipolr)
Tx
Dec
at
d1
AC
pwx
d2
pwx
mix
sync='y'
mix = n/srate for phase=1,2
mix =n/srate-d2 for phase=3,4