Mesoporous Silica Nanoparticles Loaded ...
Document type :
Article dans une revue scientifique
DOI :
Permalink :
Title :
Mesoporous Silica Nanoparticles Loaded with Surfactant: Low Temperature Magic Angle Spinning 13C and 29Si NMR Enhanced by Dynamic Nuclear Polarization
Author(s) :
Lafon, Olivier [Auteur]
Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181
Thankamony, Aany S. Lilly [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Kobayashi, Takeshi [Auteur]
Ames Laboratory [Ames, USA]
Carnevale, Diego [Auteur]
Institut des Sciences et Ingénierie Chimiques [ISIC]
Vitzthum, Veronika [Auteur]
Institut des Sciences et Ingénierie Chimiques [ISIC]
Slowing, Igor I. [Auteur]
Ames Laboratory [Ames, USA]
Kandel, Kapil [Auteur]
Ames Laboratory [Ames, USA]
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Amoureux, Jean-Paul [Auteur]
Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181
Bodenhausen, Geoffrey [Auteur]
Institut des Sciences et Ingénierie Chimiques [ISIC]
Pruski, Marek [Auteur]
Ames Laboratory [Ames, USA]

Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181
Thankamony, Aany S. Lilly [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Kobayashi, Takeshi [Auteur]
Ames Laboratory [Ames, USA]
Carnevale, Diego [Auteur]
Institut des Sciences et Ingénierie Chimiques [ISIC]
Vitzthum, Veronika [Auteur]
Institut des Sciences et Ingénierie Chimiques [ISIC]
Slowing, Igor I. [Auteur]
Ames Laboratory [Ames, USA]
Kandel, Kapil [Auteur]
Ames Laboratory [Ames, USA]
Vezin, Herve [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Amoureux, Jean-Paul [Auteur]

Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181
Bodenhausen, Geoffrey [Auteur]
Institut des Sciences et Ingénierie Chimiques [ISIC]
Pruski, Marek [Auteur]
Ames Laboratory [Ames, USA]
Journal title :
The Journal of Physical Chemistry C
Abbreviated title :
J. Phys. Chem. C
Volume number :
117
Pages :
1375-1382
Publisher :
American Chemical Society (ACS)
Publication date :
2013-01-10
ISSN :
1932-7455
English keyword(s) :
Diffusion
Nanoparticles
Quantum mechanics
Polarization
Surfactants Go to The Journal of Physical Chemistry C The Journal of Physical Chemistry C
Nanoparticles
Quantum mechanics
Polarization
Surfactants Go to The Journal of Physical Chemistry C The Journal of Physical Chemistry C
HAL domain(s) :
Chimie/Chimie théorique et/ou physique
English abstract : [en]
We show that dynamic nuclear polarization (DNP) can be used to enhance NMR signals of 13C and 29Si nuclei located in mesoporous organic/inorganic hybrid materials, at several hundreds of nanometers from stable radicals ...
Show more >We show that dynamic nuclear polarization (DNP) can be used to enhance NMR signals of 13C and 29Si nuclei located in mesoporous organic/inorganic hybrid materials, at several hundreds of nanometers from stable radicals (TOTAPOL) trapped in the surrounding frozen disordered water. The approach is demonstrated using mesoporous silica nanoparticles (MSN), functionalized with 3-(N-phenylureido)propyl (PUP) groups, filled with the surfactant cetyltrimethylammonium bromide (CTAB). The DNP-enhanced proton magnetization is transported into the mesopores via 1H–1H spin diffusion and transferred to rare spins by cross-polarization, yielding signal enhancements εon/off of around 8. When the CTAB molecules are extracted, so that the radicals can enter the mesopores, the enhancements increase to εon/off ≈ 30 for both nuclei. A quantitative analysis of the signal enhancements in MSN with and without surfactant is based on a one-dimensional proton spin diffusion model. The effect of solvent deuteration is also investigated.Show less >
Show more >We show that dynamic nuclear polarization (DNP) can be used to enhance NMR signals of 13C and 29Si nuclei located in mesoporous organic/inorganic hybrid materials, at several hundreds of nanometers from stable radicals (TOTAPOL) trapped in the surrounding frozen disordered water. The approach is demonstrated using mesoporous silica nanoparticles (MSN), functionalized with 3-(N-phenylureido)propyl (PUP) groups, filled with the surfactant cetyltrimethylammonium bromide (CTAB). The DNP-enhanced proton magnetization is transported into the mesopores via 1H–1H spin diffusion and transferred to rare spins by cross-polarization, yielding signal enhancements εon/off of around 8. When the CTAB molecules are extracted, so that the radicals can enter the mesopores, the enhancements increase to εon/off ≈ 30 for both nuclei. A quantitative analysis of the signal enhancements in MSN with and without surfactant is based on a one-dimensional proton spin diffusion model. The effect of solvent deuteration is also investigated.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
CNRS
Collections :
Research team(s) :
Propriétés magnéto structurales des matériaux (PMSM)
Submission date :
2021-06-17T14:29:22Z
2021-10-07T13:08:48Z
2021-10-07T13:08:48Z