Portal de Periódicos da CAPES

11B NMR Spectroscopy

1988; Elsevier BV; Linguagem: Inglês

10.1016/s0066-4103(08)60171-4

2163-6052

A. R. Siedle,

Advanced MRI Techniques and Applications

This chapter reviews some of the developments in 11B nuclear magnetic resonance (NMR) spectroscopy. Major use of 11B has been archival—that is, use for routine characterization of new compounds—although considerable efforts to elucidate correlations between structure and NMR parameters continue. The chapterdiscusses that availability of high-field spectrometers with multinuclear capability as well as software for sophisticated data manipulation is increasingly common, and, with these instruments, lack of chemical-shift dispersion in the face of relatively large linewidths presents much less of a problem than when complex polyboron compounds are to be characterized. Coupled with this, potent separation techniques—exemplified by thin-layer, high-pressure, and ion-exchange chromatography—are able to unravel complex mixtures and make pure compounds available for study. Use of X-ray crystallographic facilities with which to structurally characterize compounds whose spectra are reported is today almost a routine. The chapter also discusses that NMR spectra of solids are becoming increasingly easy to obtain, and application of this technique to solids is, albeit slowly, gaining well-deserved attention. A principle application has been to the study of amorphous solids and materials lacking long-range order.