Magic angle spin spectroscopy

In recent years new NMR techniques offering broad applications in stereochemical analysis have come into use. A prominent example is 2D-NMR (both 2D-resolved and 2D-correlated spectroscopy), which has been extensively applied to biopolymers (149-151). Its use with synthetic polymers has, until now, been limited to but a few cases (152, 153). A further technique, cross-polarization magic-angle spinning spectroscopy (CP-MAS NMR) will be discussed in the section on conformational analysis of solid polymers. 

Studying the nature of inclusion compounds requires special determination techniques which will work in the solid state. Those have been developed in the range of IR- Raman- and magic angle spinning spectroscopy as well as in high resolu-... 

Multiple-Quantum Magic-Angle Spinning Spectroscopy ( Al MQ/MAS NMR)... 

Other important characterization techniques for mesoporous materials include solid state NMR. Si-MAS-NMR (MAS magic angle spinning) spectroscopy is used... 

Solid-state Alnmr spectroscopy has been much used in recent years to study the composition and structure of aluminisilcates (pp. 351 -9) and other crystalline or amorphous Al compounds. The technique of magic angle spinning (MAS) must be used in such cases. ... 

Sometimes decomposition reactions can be avoided by carrying out diazotizations in concentrated sulfuric acid. By this method Law et al. (1991) obtained the 1,5-bisdiazonium salt (incorrectly called tetrazonium salt) of l,5-diamino-4,8-dihy-droxy-anthraquinone, which is deprotonated to 2.28. The structure was verified by cross-polarization magic angle spinning (CPMAS) 13C NMR spectroscopy. 

The other vibrational spectroscopies, laser Raman and magic angle spinning NMR, have also been useful. Despite its low resolution, high resolution EELS has been usefiil in UHV work for assessment of surface cleanliness and for the identification of adsorbed species. 

Azo-bis-isobutyronitrile average polymer chain concentration 4-aminotoluene (p-toluidine) Brunauer-Emmet-Teller cross-linking degree Cross Polarization-Magic Angle Spinning Nuclear Magnetic Spectroscopy Cyclic voltammetry N, A-dimethylformamide... 

Cervical cancer tissue characterized by high-resolution magic angle spinning MR spectroscopy, MAGMA), Magn. Re-son. Mater. Phys., Biol. Med. 16, 174-181. 

Although limited by sensitivity, chemical reaction monitoring via less sensitive nuclei (such as 13C) has also been reported. In 1987 Albert et al. monitored the electrochemical reaction of 2,4,6-tri-t-butylphenol by continuous flow 13C NMR [4]. More recently, Hunger and Horvath studied the conversion of vapor propan-2-ol (13C labeled) on zeolites using 1H and 13C in situ magic angle spinning (MAS) NMR spectroscopy under continuous-flow conditions [15]. 

High-Resolution Magic Angle Spinning and Cross-Polarization Magic Angle Spinning Solid-State NMR Spectroscopy... 

We have in the review described one of the most fascinating, powerful, fundamentally important facets of solid-state NMR spectroscopy, namely the combination of the high-resolution facets of magic-angle-spinning NMR and the informationbearing reintroduction of specific interactions in certain periods of the experiment via recoupling. 

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