Indirect and direct 29Si dynamic nuclear polarization of dispersed nanoparticles

Olivier Lafon; Aany Sofia Lilly Thankamony; Melanie Rosay; Fabien Aussenac; Xingyu Lu; Julien Trébosc; Viviane Bout-Roumazeilles; Hervé Vezin; Jean-Paul Amoureux

doi:10.1039/C2CC36170A

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Indirect and direct ²⁹Si dynamic nuclear polarization of dispersed nanoparticles†

Olivier Lafon,*^a Aany Sofia Lilly Thankamony,^a Melanie Rosay,^b Fabien Aussenac,^c Xingyu Lu,^a Julien Trébosc,^a Viviane Bout-Roumazeilles,^d Hervé Vezin^e and Jean-Paul Amoureux^a

Author affiliations

* Corresponding authors

^a Univ. Lille Nord de France, CNRS, UMR 8181 – UCCS, Univ. Lille 1, F-59652 Villeneuve d'Ascq, France
E-mail: olivier.lafon@univ-lille1.fr

^b Bruker Biospin Corporation, 15 Fortune Drive, Billerica, MA 01821, USA

^c Bruker Biospin SA, 34, rue de l'Industrie, 67166 Wissembourg Cedex, France

^d Univ. Lille Nord de France, CNRS, UMR 8217 – Géosystèmes, Univ. Lille 1, F-59652 Villeneuve d'Ascq, France

^e Univ. Lille Nord de France, CNRS, UMR 8516 – LASIR, Univ. Lille 1, F-59652 Villeneuve d'Ascq, France

Abstract

We show how the ²⁹Si NMR signals of dispersed inorganic nanoparticles of laponite® can be enhanced by Dynamic Nuclear Polarization (DNP). The direct DNP enhances the signals of ²⁹Si nuclei near unpaired electrons, whereas the indirect DNP via¹H enhances the signals of more remote sites.

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Article information

DOI: https://doi.org/10.1039/C2CC36170A
Article type: Communication
Submitted: 24 Aug 2012
Accepted: 03 Dec 2012
First published: 03 Dec 2012

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Chem. Commun., 2013,49, 2864-2866

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Indirect and direct ²⁹Si dynamic nuclear polarization of dispersed nanoparticles

O. Lafon, A. S. L. Thankamony, M. Rosay, F. Aussenac, X. Lu, J. Trébosc, V. Bout-Roumazeilles, H. Vezin and J. Amoureux, Chem. Commun., 2013, 49, 2864 DOI: 10.1039/C2CC36170A

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