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Quantitative 15N NMR spectroscopy

✍ Scribed by George C. Levy; T. Pehk; P. R. Srinivasan

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
410 KB
Volume
14
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Line intensities in ^15^N NMR spectra are strongly influenced by spin‐lattice and spin–spin relaxation times, relaxation mechanisms and experimental conditions. Special care has to be taken in using ^15^N spectra for quantitative purposes. Quantitative aspects are discussed for the ^15^N NMR of molecules with different nitrogen functional groups and also mixtures of nitrogen‐containing compounds. It is shown that, in general, quantitative data are obtainable from integration of ^15^N lines in proton decoupled ^15^N NMR spectra using NOE suppression. Addition of paramagnetic relaxation reagents (PARR) under controlled conditions is frequently needed to accomplish the experiment within reasonable time limits.

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