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2 FUNDAMENTALS OF SOLID-STATE NMR MEASUREMENT
In addition, since TPPM decoupling also decreases the interference between MAS speed
and CW decoupling, it also prevents the line-width from increasing under high-speed
MAS.
TPPM decoupling is especially effective in the following cases.
• High magnetic field (500 MHz or more)
• High-speed spinning
•
19
F decoupling
• System that has heteronuclear interactions other than
2.4
SINGLE PULSE MEASUREMENT
One of the fundamental measuring methods of a solid-state NMR measurement is a sin-
gle-pulse measurement. When you carry out a single-pulse measurement, you use MAS.
Usually, although the cross-polarization method (
NMR of an organic compound, the single-pulse measurement is used for a sample which
does not contain the
ment may also be used for a sample with rapid molecular motion like adamantane. When
measuring a sample containing the
to MAS.
2-4
1
H nucleus or contains very few. Moreover, single-pulse measure-
1
H nucleus, high-power decoupling is used in addition
1
H such as
15
N or
14
N
Sect. 2.5) is used in the solid-state
NMECAXS_V50-SLD-2
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