Near-zero-field nuclear magnetic resonance

Details Near-zero-field nuclear magnetic resonance Near-zero-field nuclear magnetic resonance

2011-07-08

arxiv.org/abs/1107.1706v1

Physics

Atomic Physics

5 pages, 5 figures

Scientific paper

We investigate nuclear magnetic resonance (NMR) in near-zero-field, where the Zeeman interaction can be treated as a perturbation to the electron mediated scalar interaction (J-coupling). This is in stark contrast to the high field case, where heteronuclear J-couplings are normally treated as a small perturbation. We show that the presence of very small magnetic fields results in splitting of the zero-field NMR lines, imparting considerable additional information to the pure zero-field spectra. Experimental results are in good agreement with first-order perturbation theory and with full numerical simulation when perturbation theory breaks down. We present simple rules for understanding the splitting patterns in near-zero-field NMR, which can be applied to molecules with non-trivial spectra.

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