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Chapter 5

14N Solid-state NMR

Nitrogen is commonly found in organic, inorganic and biological solids, yet is extremely challenging to study by solid-state NMR. This chapter presents an overview of modern methods for observing the almost-100% naturally abundant 14N isotope, a spin-1 nucleus typically subject to a large quadrupolar interaction. Either the fundamental (Δm=1) or overtone (Δm=2) 14N transitions can be observed, and these two options require very distinct experimental approaches. The former transitions are usually broadened over several MHz and require frequency-swept pulses and piecewise acquisition, while the latter transition gives far narrower linewidths and higher spectral resolution, but exhibits some unusual spin physics, particularly under magic-angle spinning. The possibility of sensitivity enhancement by polarisation transfer, or by the indirect detection of 14N signals using more amenable nuclei, is also discussed.

Publication details


Print publication date
09 Apr 2018
Copyright year
2018
Print ISBN
978-1-78262-854-5
PDF eISBN
978-1-78801-046-7
ePub eISBN
978-1-78801-419-9
From the book series:
New Developments in NMR