Polarization-transfer methods in solid-state magic-angle-spinning NMR: adiabatic CN pulse sequences.
An adiabatic double-quantum polarization-transfer experiment is described. It can be characterized as an adiabatic variant of the POST-C7 experiment. A continuous variation of the phase increment between pulses leads to the introduction of a fictitious Zeeman field that allows for an adiabatic passage through the recoupling condition. This results in a chemical-shift-offset-compensated adiabatic experiment, which leads to an efficient and broadbanded polarization transfer or to a double-quantum excitation. Similar variations of other C- or R-type experiments can be envisioned.
Verel
René
R
Physical Chemistry, ETH-Hönggerberg 8093 Zürich, Switzerland.
Meier
Beat H
BH
D002247:Carbon Isotopes; D003198:Computer Simulation; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D009587:Nitrogen Isotopes; D011789:Quantum Theory
D002247:Carbon Isotopes; D009587:Nitrogen Isotopes