Decoupling/cross

Carbon-13. The molecular structure of phosphino-thioformamides (27) and their chalcogenides have been studied in the solid and liquid states.57 The, 3C n.m.r. spectra of solid methylphenyl phosphonium salts have been studied using high power decoupling cross-polarisation and slow magic angle rotation. 

The methods of high power decoupling, cross-polarization and magic angle spinning produce useful spectra from intractable polymers. In a rather rigid material... 

It has been suggested in the literature [34] that filtration devices producing Taylor or Dean vortices can help depolarization of the solute build up on membranes. This seems to be an attractive way because of excellent bulk fluid mixing, high wall shear rates and weakly decoupled cross-flow with transmembrane flux. Unfortunately there are some severe limitations on a technical and economical point of view with such devices. Build up and scale up of these modules are expensive with difficulties in repairing and changing membranes. A good compromise between economic and technical constraints has been described by Charpin et al. [39]. It consists in the preparation of mineral (metal... 

The practical limitations of the high-power-decoupling/ cross-polarization/magic-angle-rotation suite of NMR techniques are discussed, with mention made of such matters as "dilution, mobility, and physical state. Various types of information available from such solid-state NMR studies which distinguish them from solution work are listed. A number of examples of applications for C are reviewed, including questions of crystal symmetry, molecular conformation and motion, polymorphism, and tautomerism. Work on the silicon-29 nucleus, especially in studies of zeolites and related materials, is discussed and references given. 

---