My understanding is that the chemical shift of your sample is in the range of 0-4500 ppm, but your signal may be not that broad. Anyway, you can run a series of P-31 MAS with different observe frequency (o1). For example, one spectrum with o1 at 200 kHz, the next one at 100 kHz, and so on. Add all the spectra, you should get the full range.
发表于 2010-5-4 20:14:24
