Polarization-transfer methods in solid-state magic-angle-spinning NMR: adiabatic CN pulse sequences. |
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Authors: | René Verel Beat H Meier |
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Institution: | Physical Chemistry, ETH-H?nggerberg 8093 Zürich, Switzerland. |
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Abstract: | 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. |
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