2D NMR-SPECTRA FROM STOCHASTIC NMR - COUPLING AND EXCHANGE INFORMATION FROM 3RD ORDER FREQUENCY KERNEL

It is shown how 1D and 2D NMR spectra can be derived from one NMR experiment. The method is based on the evaluation of the nonlinear response of the nuclear spin system to stochastic excitation the strength of which corresponds to values close to the maximum of the saturation curve. Thus, optimum sensitivity is obtained at the expense of slight line broadening in the 1D spectrum. Crosspeaks in the 2D plane indicate the existence of saturation transfer between two transitions at the respective frequencies. This is demonstrated with simulated (AB) as well as experimental spectra (AB, chemical exchange).