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Enhancing the sensitivity of multidimensional NMR experiments by using triply-compensated π pulses
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Enhancing the sensitivity of multidimensional NMR experiments by using triply-compensated π pulses
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Journal Article
Enhancing the sensitivity of multidimensional NMR experiments by using triply-compensated π pulses
2017
Overview
In multidimensional solution NMR experiments, π pulses are used extensively for inversion and refocusing operations on
1
H,
13
C and
15
N nuclei. Pulse miscalibration, off-resonance effects, and
J
-coupling evolution during π pulse execution result in severe signal losses that are exacerbated at high magnetic fields. Here, we report the implementation of a triply-compensated π pulse (G5) optimized for both inversion and refocusing in widely used 2- and 3-dimensional experiments. By replacing most of the hard π pulses, adiabatic or composite pulses on the
1
H,
13
C and
15
N channels with G5 pulses, we obtained signal enhancements ranging from 80 to 240%. We anticipate that triply-compensated pulses will be crucial for improving the performance of multidimensional and multinuclear pulse sequences at ultra-high fields.
Publisher
Springer Netherlands,Springer Nature B.V
