ChemPhysChem 2014-12-15

Billion-fold enhancement in sensitivity of nuclear magnetic resonance spectroscopy for magnesium ions in solution.

Alexander Gottberg, Monika Stachura, Magdalena Kowalska, Mark L Bissell, Vaida Arcisauskaite, Klaus Blaum, Alexander Helmke, Karl Johnston, Kim Kreim, Flemming H Larsen, Rainer Neugart, Gerda Neyens, Ronald F Garcia Ruiz, Daniel Szunyogh, Peter W Thulstrup, Deyan T Yordanov, Lars Hemmingsen

Index: ChemPhysChem 15(18) , 3929-32, (2014)

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Abstract

β-nuclear magnetic resonance (NMR) spectroscopy is highly sensitive compared to conventional NMR spectroscopy, and may be applied for several elements across the periodic table. β-NMR has previously been successfully applied in the fields of nuclear and solid-state physics. In this work, β-NMR is applied, for the first time, to record an NMR spectrum for a species in solution. (31)Mg β-NMR spectra are measured for as few as 10(7) magnesium ions in ionic liquid (EMIM-Ac) within minutes, as a prototypical test case. Resonances are observed at 3882.9 and 3887.2 kHz in an external field of 0.3 T. The key achievement of the current work is to demonstrate that β-NMR is applicable for the analysis of species in solution, and thus represents a novel spectroscopic technique for use in general chemistry and potentially in biochemistry.© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.