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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Chemical Communications

Issue 28, 2013

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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

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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

Bruker Biospin Corporation, 15 Fortune Drive, Billerica, USA

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

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

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

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

DOI: 10.1039/C2CC36170A
Received 24 Aug 2012, Accepted 03 Dec 2012
First published online 03 Dec 2012

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

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Chemical Communications

Indirect and direct 29Si dynamic nuclear polarization of dispersed nanoparticles

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Indirect and direct ²⁹Si dynamic nuclear polarization of dispersed nanoparticles