Nuclear magnetic resonance MAS

ENDOR = electron nuclear double resonance EPR = electron-paramagnetic resonance ESR = electron-spin resonance NMR = nuclear magnetic resonance MA = modulation amplitude SOFT = second-order perturbation theory s-o = spin-orbit zfs = zero-field splitting (for S > 1 /2) D = uniaxial zfs E = rhombic zfs g = g-factor with principal components gy, and g ge = free electron g-factor a = hyperfrne splitting constant A = hyperftne coupling constant for a given nucleus N (nuclear spin 7>0). 

Magic-angle spinning nuclear magnetic resonance (MAS-NMR)... 

The catalysts were also characterized with P magic angle spinning nuclear magnetic resonance (MAS-NMR) spectra (Fig. 17.2) which showed that they were all mixtures of several heteropolyphosphotungstate species. 

A. Stamboulis, R.V. Law, R.G. Hill, Characterisation of commercial ionomer glasses using magic angle nuclear magnetic resonance (MAS-NMR), Biomaterials 25 (2004) 3907-3913. 

In this chapter, we will present the results of an investigation into the effects of a polymeric cationic compound upon the direction of the crystallization and the formation of a novel layer silicate type based on earlier work [11, 18-20]. The novel layer silicates were characterized by chemical and physical methods, especially by x-ray difrraction (XRD), high-resolution electron microscopy (HI M), and magic-angle-spinning nuclear magnetic resonance (MAS NMR). 

In addition to search systems, artificial intelligence-based computer programs seek to determine the structure or substructure from spectral profiles. Some of these programs use data from different types of instruments (nuclear magnetic resonance, ma.ss, and IR spectrometers, etc.) to determine structure.s.- ... 

---