Volume 95 Issue 19 | p. 6 | News of The Week
Issue Date: May 8, 2017

Boosting NMR sensitivity

Technique that decouples electron spins from nuclear spins improves spectra
Department: Science & Technology
News Channels: JACS In C&EN, Analytical SCENE
Keywords: spectroscopy, solid-state NMR, electron decoupling, dynamic nuclear polarization

Poor sensitivity is one of the drawbacks of nuclear magnetic resonance spectroscopy. A method called dynamic nuclear polarization (DNP) can improve the situation, particularly for solid-state NMR, by transferring spin polarization from unpaired electrons on paramagnetic agents to the nuclei of the molecules being analyzed. This aligns the nuclei and thus boosts the NMR signal. But the electron spins are such strong magnets that they interfere with the magnetization they just induced on the nuclei, . . .

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