Figure 1.
NMR pulse sequence for the generation of 2D NMR spectra through indirect detection of intra-molecular zero-quantum-coherences from 3D spatially localized volumes. t1 and t2 correspond to the indirect and direct detection periods, whereas TE1 and TE2 are optimized to provide the highest signal recovery for a given scalar-coupled spin-system. The phase of the 45° mixing pulse is cycled (+y, −y) in concert with the receiver phase (+x, −x) in order to eliminate unwanted signals created by T1 recovery during the t1 period.