Pulsed‐field gradient nuclear magnetic resonance as a tool for studying translational diffusion: Part 1. Basic theory

PGSE,OGSE, and sensitivity to axon diameter in diffusionMRI: Insight from a simulation study

“…Plots show that the signal for µm (left) flattens out almost instantaneously, while for µm (right) it flattens after about 17 ms. These results are consistent with previous studies of signal from the restricted compartment as a function of diffusion time . The flattening corresponds to the root mean squared displacement of free diffusion approaching the pore size, i.e., .…”

One‐Pot, 18‐Component Synthesis of an Octahedral Nanocontainer Molecule

“…That 5 adapts a comparable structure in solution was demonstrated by diffusivity measurements. Pulsed field gradient spin echo (PSG‐SE) NMR experiments in CD 3 OD containing 0.4 % CF 3 CO 2 D provided a diffusion rate D =(2.28±0.09)×10 −6 cm 2 s −1 20. Application of the Stokes–Einstein equation yields a solvodynamic diameter of 3.2 nm, which is consistent with estimates from molecular models.…”

Enhanced Lithium Transference Numbers in Ionic Liquid Electrolytes

“…The ionic liquids were filled into 5 mm NMR tubes, which were sealed. The self-diffusion coefficients D were measured by means of the pulsed gradient stimulated echo (PGSTE technique). , In this technique, the echo signal I is given by I ( τ , T M , G ) = 1 2 I 0 exp true[ − true( 2 τ T 2 true) − true( T M T 1 true) true] exp true( − γ 2 G 2 δ 2 D true( Δ − δ 3 true) true) Here, τ and T M denote the time between the first and the second and between the second and the third 90° pulse, respectively, while T 1 and T 2 are the spin−lattice and spin−spin relaxation times, respectively. G denotes the magnetic field gradient, Δ is the diffusion time, γ is the gyromagnetic ratio, and δ is the duration of the gradient pulse.…”