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Improved Dynamic Nuclear Polarization Surface‐Enhanced NMR Spectroscopy through Controlled Incorporation of Deuterated Functional Groups

2013; Wiley; Volume: 52; Issue: 4 Linguagem: Inglês

10.1002/anie.201208699

1521-3773

Alexandre Zagdoun, Aaron J. Rossini, Matthew P. Conley, W Grüning, Martin Schwarzwälder, Moreno Lelli, W. Trent Franks, Hartmut Oschkinat, Christophe Copéret, Lyndon Emsley, Anne Lesage,

NMR spectroscopy and applications

In a spin: The use of deuterated surface passivation agents is shown to restore dynamic nuclear polarization (DNP) surface-enhanced NMR signals that are reduced in substrates containing methyl groups, while still protecting sensitive sites on the surface (see picture). Furthermore, apolar groups such as [D9]-trimethylsiloxy (TMS) repel radicals (yellow) away from the surface, thus diminishing detrimental paramagnetic effects induced by radical proximity.