It is shown that surface NMR spectra can be greatly enhanced using dynamic nuclear polarization. Polarization is transferred from the protons of the solvent to the rare nuclei (here carbon-13 at natural isotopic abundance) at the surface, yielding at least a 50-fold signal enhancement for surface species covalently incorporated into a silica framework.
Surface enhanced NMR spectroscopy by dynamic nuclear polarization / Lesage, Anne; Lelli, Moreno; Gajan, David; Caporini, Marc A.; Vitzthum, Veronika; Miéville, Pascal; Alauzun, Johan; Roussey, Arthur; Thieuleux, Chloé; Mehdi, Ahmad; Bodenhausen, Geoffrey; Copéret, Christophe; Emsley, Lyndon. - In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - ISSN 0002-7863. - STAMPA. - 132:(2010), pp. 15459-15461. [10.1021/ja104771z]
Surface enhanced NMR spectroscopy by dynamic nuclear polarization
LELLI, MORENOWriting – Original Draft Preparation
;
2010
Abstract
It is shown that surface NMR spectra can be greatly enhanced using dynamic nuclear polarization. Polarization is transferred from the protons of the solvent to the rare nuclei (here carbon-13 at natural isotopic abundance) at the surface, yielding at least a 50-fold signal enhancement for surface species covalently incorporated into a silica framework.
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