Figure 1.

Schematic description of ultrafast 2D NMR experiments. Field gradients are used to create windings of magnetizations based on the indirect-domain evolution frequencies (left); these are preserved as either phase or amplitude modulations during the mixing process (center), and finally read out by a train of oscillating acquisition gradients creating site-specific Ω₁-dependent echoes modulated as a function of t₂ (right). All these spatially dependent patterns and manipulations are susceptible to influence by motions, particularly by the unavoidable effects of the random molecular diffusion considered in this study.