Magnetic Resonance Imaging of Electroconvection in a Polar Organic Solvent

Applications of NMR tomography to mass transfer studies

“…235 A nitrobenzene ± C 6 D 6 mixture also exhibited electroconvection, which can be due to the appearance of the space charge as a result of association of the polar molecules around the ions. 282 In this case, the expression for the effective diffusion coefficient at room temperature has the form D = 1.08610 75 cm 2 s 71 + (3.33610 75 cm 4 kV 72 s 71 ) E 2 , where E is the strength of the applied electric field.…”

Spatiotemporal correlations in transport processes determined by multiple pulsed field gradient experiments

“…The treatment of arbitrarily shaped field gradients for motion statistics that are known beforehand was described in detail in (77). Combinations of PFG encoding and constant-gradient readout, being equivalent to simultaneous position and displacement encoding, were presented in (78); and 2-D correlation maps of motion similar to the POXSY scheme but in the presence of a constant, weak magnetic field gradient were performed (79). The extension of single-q encoding for the determination of self-diffusion coefficients in high, constant, and time-invariant field gradients (80 -82) to multiple encodings by RF pulse trains will expand the applicability of VEXSY type techniques to motion on much smaller length scales.…”

Determination of the three-dimensional structure for weakly aligned biomolecules by NMR spectroscopy

“…167 For decreasing the influence of the molecular motion on the measured signal, multiquantum filtration is used. 168,169 This technique is equally suitable for dipole-coupled systems with a spin of 1/2.…”