Solvent-Free High-Field Dynamic Nuclear Polarization of Mesoporous Silica Functionalized with TEMPO

被引：30

作者：

Thankamony, Aany Sofia Lilly ^{[1
,2
]}

Lafon, Olivier ^{[1
,2
]}

Lu, Xingyu ^{[1
,2
]}

Aussenac, Fabien ^{[3
]}

Rosay, Melanie ^{[4
]}

Trebosc, Julien ^{[1
,2
]}

Vezin, Herve ^{[1
,5
]}

Amoureux, Jean-Paul ^{[1
,2
]}

机构：

[1] Univ Lille Nord France, F-59000 Lille, France

[2] Univ Lille 1, UCCS, UMR 8181, CNRS,Unite Catalyse & Chim Solide, F-59652 Villeneuve Dascq, France

[3] Bruker BioSpin SA, F-67166 Wissembourg, France

[4] Bruker BioSpin Corp, Billerica, MA 01821 USA

[5] Univ Lille 1, LASIR, UMR 8516, CNRS,Lab Spectrochim Infrarouge & Raman, F-59652 Villeneuve, France

来源：

APPLIED MAGNETIC RESONANCE | 2012年 / 43卷 / 1-2期

关键词：

SOLID-STATE NMR; SPIN-LATTICE-RELAXATION; ENHANCED NMR; C-13; NMR; SELECTIVE OXIDATION; MOLECULAR-DYNAMICS; GEL; SENSITIVITY; H-1; SPECTROSCOPY;

D O I：

10.1007/s00723-012-0364-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

We report high-field magic-angle spinning dynamic nuclear polarization (MAS DNP) of mesoporous silica functionalized with nitroxide radicals. These results demonstrate that co-condensation can be employed to incorporate DNP polarizing agents into inorganic materials and that solvent-free DNP is feasible for porous materials. For the investigated material, the direct MAS DNP enhances the Si-29 nuclear magnetic resonance (NMR) spectra, whereas the indirect MAS DNP via protons is inapplicable owing to the inefficiency of cross polarization transfer. Furthermore, the Si-29 signals in direct experiments build up in a few seconds at 100 K. This fast polarization buildup improves the NMR sensitivity and will be useful for the investigation of direct DNP below 100 K.

引用

页码：237 / 250

页数：14

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