Frequency-swept pulses for ultrafast spatially encoded NMR

Ultrafast NMR based on spatial encoding yields arbitrary multidimensional spectra in a single scan. The dramatic acceleration afforded by parallelisation makes it possible to capture transient species and processes, has notably been applied the monitoring of reactions analysis hyperpolarised species. At heart ultrafast lies spatially sequential manipulation nuclear spins. This is virtually always achieved combining swept radio-frequency pulse with magnetic field gradient pulse. dynamics spins during these sequence elements key understand design experiments, can often be described surprisingly simple models. article describes relaxation, chemical shift diffusion common framework discusses directions for future developments.