Abstract
The application of multipulse and of combined rotation and multipulse spectroscopy (CRAMPS) to fluorine is demonstrated. The MREV-8 multipulse sequence is applied to average the homonuclear dipolar coupling between the fluorine nuclei. The heteronuclear dipolar coupling to the protons can be suppressed by irradiation with a synchronized sequence of π pulses at the proton frequency. MAS is applied to average the anisotropy of the chemical shift. Applications to a fluorinated adamantane derivative and to polyvinylidenedifluoride (PVDF) are shown.
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