ROSY: The answer to mixture analysis in solid state NMR
NM080003E
The ROSY method facilitates easier and faster analysis of samples mixed with more than two components (crystals).
Mixture analysis by ROSY(Relaxation Ordered SpectroscopY) method
Due to the fast spin-diffusion among 1H spins, the longitudinal relaxation time (T1) of 1H spins is governed by the fast relaxing fractions and is uniform within each crystal. Thus we can separate 13C CPMAS spectra of each crystal by sorting spectra of the mixture into order of 1H T1 time. The procedure is numerically done by inverse Laplace transformation.
Experiments and processes
Results: the mixture of santonin and cholic acid
ROSY method provides a separate 13C CPMAS spectra from the mixture
Inverse Laplace Transforms for ROSY will be available in NMR software Delta V 5.0.
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