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Barbosa de Mattos DF, Dreos A, Johnstone MD, Runemark A, Sauvée C, Gray V, Moth-Poulsen K, Sundén H, Abrahamsson M. Covalent incorporation of diphenylanthracene in oxotriphenylhexanoate organogels as a quasi-solid photon upconversion matrix. J Chem Phys 2020; 153:214705. [PMID: 33291902 DOI: 10.1063/5.0029307] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Triplet-triplet annihilation photon upconversion (TTA-UC) in solid state assemblies are desirable since they can be easily incorporated into devices such as solar cells, thus utilizing more of the solar spectrum. Realizing this is, however, a significant challenge that must circumvent the need for molecular diffusion, poor exciton migration, and detrimental back energy transfer among other hurdles. Here, we show that the above-mentioned issues can be overcome using the versatile and easily synthesized oxotriphenylhexanoate (OTHO) gelator that allows covalent incorporation of chromophores (or other functional units) at well-defined positions. To study the self-assembly properties as well as its use as a TTA-UC platform, we combine the benchmark couple platinum octaethylporphyrin as a sensitizer and 9,10-diphenylanthracene (DPA) as an annihilator, where DPA is covalently linked to the OTHO gelator at different positions. We show that TTA-UC can be achieved in the chromophore-decorated gels and that the position of attachment affects the photophysical properties as well as triplet energy transfer and triplet-triplet annihilation. This study not only provides proof-of-principle for the covalent approach but also highlights the need for a detailed mechanistic insight into the photophysical processes underpinning solid state TTA-UC.
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Affiliation(s)
- Deise F Barbosa de Mattos
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Ambra Dreos
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Mark D Johnstone
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - August Runemark
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Claire Sauvée
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Victor Gray
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Kasper Moth-Poulsen
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Henrik Sundén
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Maria Abrahamsson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
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Maisonneuve E, Sauvée C, Mailloux A, Cortey A, Jouannic JM. Intrauterine transfusions for maternofetal red-blood-cell incompatibility in monochorionic diamniotic twin pregnancy. Ultrasound Obstet Gynecol 2020; 55:838-839. [PMID: 31381217 DOI: 10.1002/uog.20418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 07/27/2019] [Accepted: 07/29/2019] [Indexed: 06/10/2023]
Affiliation(s)
- E Maisonneuve
- Fetal Medicine Department, Pôle ORIGYNE.6, Hôpital Armand Trousseau, APHP, Paris, France
- Clinical Unit, Centre National de Référence en Hémobiologie Périnatale, (CNRHP), Hôpital Armand Trousseau, APHP, Paris, France
| | - C Sauvée
- Obstetrics and Gynecology Department, Hôpital de Cornouaille, Quimper, France
| | - A Mailloux
- Immunohematology Laboratory, Centre National de Référence en Hémobiologie, Périnatale (CNRHP), Hôpital Saint Antoine, APHP, Paris, France
| | - A Cortey
- Fetal Medicine Department, Pôle ORIGYNE.6, Hôpital Armand Trousseau, APHP, Paris, France
- Clinical Unit, Centre National de Référence en Hémobiologie Périnatale, (CNRHP), Hôpital Armand Trousseau, APHP, Paris, France
| | - J-M Jouannic
- Fetal Medicine Department, Pôle ORIGYNE.6, Hôpital Armand Trousseau, APHP, Paris, France
- Clinical Unit, Centre National de Référence en Hémobiologie Périnatale, (CNRHP), Hôpital Armand Trousseau, APHP, Paris, France
- Médecine Sorbonne Universités, Paris, France
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3
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Hsu CW, Sauvée C, Sundén H, Andréasson J. Writing and erasing multicolored information in diarylethene-based supramolecular gels. Chem Sci 2018; 9:8019-8023. [PMID: 30450186 PMCID: PMC6202928 DOI: 10.1039/c8sc03127d] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Accepted: 08/28/2018] [Indexed: 02/04/2023] Open
Abstract
Diarylethene photoswitches in supramolecular gels constitute a system where the writing and erasing of multicolored fluorescent information is easily achieved.
A facile cocktail approach implying the mixing of diarylethene (DAE) photoswitches and low molecular weight gelators (LMWG) is presented. The photoresponsive gels exhibit multicolored emission that can be precisely controlled by different light exposure schemes (wavelength and dose), applicable for fluorescence patterning/writing. Including also a blue-emitting fluorophore allows for tri-chromatic color tuning of the emission via multistep energy transfer reactions, which in turn yields a non-linear response between the emission spectra and the light dose. This feature is highly desired in data security and anti-counterfeiting contexts. The information written in the gels can be conveniently erased by light, mass diffusion, or shaking; the latter being due to the thixotropic properties of the gels.
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Affiliation(s)
- Chien-Wei Hsu
- Chalmers University of Technology , Department of Chemistry and Chemical Engineering , Chemistry and Biochemistyry , Kemivägen 10 , 412 96 , Göteborg , Sweden . ;
| | - Claire Sauvée
- Chalmers University of Technology , Department of Chemistry and Chemical Engineering , Chemistry and Biochemistyry , Kemivägen 10 , 412 96 , Göteborg , Sweden . ;
| | - Henrik Sundén
- Chalmers University of Technology , Department of Chemistry and Chemical Engineering , Chemistry and Biochemistyry , Kemivägen 10 , 412 96 , Göteborg , Sweden . ;
| | - Joakim Andréasson
- Chalmers University of Technology , Department of Chemistry and Chemical Engineering , Chemistry and Biochemistyry , Kemivägen 10 , 412 96 , Göteborg , Sweden . ;
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4
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Sauvée C, Ström A, Haukka M, Sundén H. A Multi-Component Reaction towards the Development of Highly Modular Hydrogelators. Chemistry 2018; 24:8071-8075. [DOI: 10.1002/chem.201800635] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 04/12/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Claire Sauvée
- Chemistry and Chemical Engineering; Chalmers University of Technology; Kemivägen 10 412 96 Göteborg Sweden
| | - Anna Ström
- Chemistry and Chemical Engineering; Chalmers University of Technology; Kemivägen 10 412 96 Göteborg Sweden
| | - Matti Haukka
- Department of Chemistry; University of Jyväskylä; P.O. Box 35 40014 University of Jyväskylä Finland
| | - Henrik Sundén
- Chemistry and Chemical Engineering; Chalmers University of Technology; Kemivägen 10 412 96 Göteborg Sweden
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5
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Liao WC, Ong TC, Gajan D, Bernada F, Sauvée C, Yulikov M, Pucino M, Schowner R, Schwarzwälder M, Buchmeiser MR, Jeschke G, Tordo P, Ouari O, Lesage A, Emsley L, Copéret C. Dendritic polarizing agents for DNP SENS. Chem Sci 2017; 8:416-422. [PMID: 28451187 PMCID: PMC5365053 DOI: 10.1039/c6sc03139k] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 08/19/2016] [Indexed: 01/22/2023] Open
Abstract
Dendrimer-shielded polarizing agents for the application of DNP SENS to reactive surfaces.
Dynamic Nuclear Polarization Surface Enhanced NMR Spectroscopy (DNP SENS) is an effective method to significantly improve solid-state NMR investigation of solid surfaces. The presence of unpaired electrons (polarizing agents) is crucial for DNP, but it has drawbacks such as leading to faster nuclear spin relaxation, or even reaction with the substrate under investigation. The latter can be a particular problem for heterogeneous catalysts. Here, we present a series of carbosilane-based dendritic polarizing agents, in which the bulky dendrimer can reduce the interaction between the solid surface and the free radical. We thereby preserve long nuclear T′2 of the surface species, and even successfully enhance a reactive heterogeneous metathesis catalyst.
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Affiliation(s)
- Wei-Chih Liao
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir-Prelog-Weg 1-5 , 8093 Zürich , Switzerland .
| | - Ta-Chung Ong
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir-Prelog-Weg 1-5 , 8093 Zürich , Switzerland .
| | - David Gajan
- Centre de RMN à Très Hauts Champs , Institut de Sciences Analytiques (CNRS/ENS Lyon/UCB Lyon 1) , Université de Lyon , 69100 Villeurbanne , France
| | - Florian Bernada
- Aix-Marseille Univ , CNRS , ICR UMR 7273 , Marseille , 13013 , France
| | - Claire Sauvée
- Aix-Marseille Univ , CNRS , ICR UMR 7273 , Marseille , 13013 , France
| | - Maxim Yulikov
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir-Prelog-Weg 1-5 , 8093 Zürich , Switzerland .
| | - Margherita Pucino
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir-Prelog-Weg 1-5 , 8093 Zürich , Switzerland .
| | - Roman Schowner
- Institut für Polymerchemie , Universität Stuttgart , Pfaffenwaldring 55 , D-70569 Stuttgart , Germany
| | - Martin Schwarzwälder
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir-Prelog-Weg 1-5 , 8093 Zürich , Switzerland .
| | - Michael R Buchmeiser
- Institut für Polymerchemie , Universität Stuttgart , Pfaffenwaldring 55 , D-70569 Stuttgart , Germany
| | - Gunnar Jeschke
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir-Prelog-Weg 1-5 , 8093 Zürich , Switzerland .
| | - Paul Tordo
- Aix-Marseille Univ , CNRS , ICR UMR 7273 , Marseille , 13013 , France
| | - Olivier Ouari
- Aix-Marseille Univ , CNRS , ICR UMR 7273 , Marseille , 13013 , France
| | - Anne Lesage
- Centre de RMN à Très Hauts Champs , Institut de Sciences Analytiques (CNRS/ENS Lyon/UCB Lyon 1) , Université de Lyon , 69100 Villeurbanne , France
| | - Lyndon Emsley
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir-Prelog-Weg 1-5 , 8093 Zürich , Switzerland .
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6
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Sauvée C, Casano G, Abel S, Rockenbauer A, Akhmetzyanov D, Karoui H, Siri D, Aussenac F, Maas W, Weber RT, Prisner T, Rosay M, Tordo P, Ouari O. Tailoring of Polarizing Agents in the bTurea Series for Cross-Effect Dynamic Nuclear Polarization in Aqueous Media. Chemistry 2016; 22:5598-606. [PMID: 26992052 DOI: 10.1002/chem.201504693] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Indexed: 11/10/2022]
Abstract
A series of 18 nitroxide biradicals derived from bTurea has been prepared, and their enhancement factors ɛ ((1)H) in cross-effect dynamic nuclear polarization (CE DNP) NMR experiments at 9.4 and 14.1 T and 100 K in a DNP-optimized glycerol/water matrix ("DNP juice") have been studied. We observe that ɛ ((1)H) is strongly correlated with the substituents on the polarizing agents, and its trend is discussed in terms of different molecular parameters: solubility, average e-e distance, relative orientation of the nitroxide moieties, and electron spin relaxation times. We show that too short an e-e distance or too long a T1e can dramatically limit ɛ ((1)H). Our study also shows that the molecular structure of AMUPol is not optimal and its ɛ ((1)H) could be further improved through stronger interaction with the glassy matrix and a better orientation of the TEMPO moieties. A new AMUPol derivative introduced here provides a better ɛ ((1)H) than AMUPol itself (by a factor of ca. 1.2).
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Affiliation(s)
- Claire Sauvée
- Aix-Marseille Université, CNRS, ICR UMR 7273, 13397, Marseille cedex 20, France
| | - Gilles Casano
- Aix-Marseille Université, CNRS, ICR UMR 7273, 13397, Marseille cedex 20, France
| | - Sébastien Abel
- Aix-Marseille Université, CNRS, ICR UMR 7273, 13397, Marseille cedex 20, France
| | - Antal Rockenbauer
- Institute of Materials and Environmental Chemistry, Hungarian Academy of Sciences, Department of Physics, Budapest University of Technology and Economics and MTA-BME Condensed Matter Research Group, Budafoki ut 8, 1111, Budapest, Hungary
| | - Dimitry Akhmetzyanov
- Institute of Physical and Theoretical Chemistry, Goethe University Frankfurt, Max-von-Laue Str. 7, 60438, Frankfurt-am-Main, Germany
| | - Hakim Karoui
- Aix-Marseille Université, CNRS, ICR UMR 7273, 13397, Marseille cedex 20, France
| | - Didier Siri
- Aix-Marseille Université, CNRS, ICR UMR 7273, 13397, Marseille cedex 20, France
| | - Fabien Aussenac
- Bruker BioSpin S.A.S., 34 rue de l'industrie, 67166, Wissembourg, France
| | - Werner Maas
- Bruker BioSpin Corporation, 15 Fortune Drive, Billerica, Massachusetts, 01821, USA
| | - Ralph T Weber
- Bruker BioSpin Corporation, 15 Fortune Drive, Billerica, Massachusetts, 01821, USA
| | - Thomas Prisner
- Institute of Physical and Theoretical Chemistry, Goethe University Frankfurt, Max-von-Laue Str. 7, 60438, Frankfurt-am-Main, Germany
| | - Mélanie Rosay
- Bruker BioSpin Corporation, 15 Fortune Drive, Billerica, Massachusetts, 01821, USA
| | - Paul Tordo
- Aix-Marseille Université, CNRS, ICR UMR 7273, 13397, Marseille cedex 20, France.
| | - Olivier Ouari
- Aix-Marseille Université, CNRS, ICR UMR 7273, 13397, Marseille cedex 20, France.
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7
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Kubicki DJ, Casano G, Schwarzwälder M, Abel S, Sauvée C, Ganesan K, Yulikov M, Rossini AJ, Jeschke G, Copéret C, Lesage A, Tordo P, Ouari O, Emsley L. Rational design of dinitroxide biradicals for efficient cross-effect dynamic nuclear polarization. Chem Sci 2015; 7:550-558. [PMID: 29896347 PMCID: PMC5952883 DOI: 10.1039/c5sc02921j] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 10/12/2015] [Indexed: 12/27/2022] Open
Abstract
A series of 37 dinitroxide biradicals have been prepared and their performance studied as polarizing agents in cross-effect DNP NMR experiments at 9.4 T and 100 K in 1,1,2,2-tetrachloroethane (TCE). We observe that in this regime the DNP performance is strongly correlated with the substituents on the polarizing agents, and electron and nuclear spin relaxation times, with longer relaxation times leading to better enhancements. We also observe that deuteration of the radicals generally leads to better DNP enhancement but with longer build-up time. One of the new radicals introduced here provides the best performance obtained so far under these conditions.
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Affiliation(s)
- Dominik J Kubicki
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - Gilles Casano
- Aix-Marseille Université , CNRS , ICR UMR 7273 , 13397 Marseille , France . ;
| | - Martin Schwarzwälder
- ETH Zurich , Department of Chemistry, Laboratory of Inorganic Chemistry , 8093 Zurich , Switzerland
| | - Sébastien Abel
- Aix-Marseille Université , CNRS , ICR UMR 7273 , 13397 Marseille , France . ;
| | - Claire Sauvée
- Aix-Marseille Université , CNRS , ICR UMR 7273 , 13397 Marseille , France . ;
| | - Karthikeyan Ganesan
- Aix-Marseille Université , CNRS , ICR UMR 7273 , 13397 Marseille , France . ;
| | - Maxim Yulikov
- ETH Zurich , Department of Chemistry, Laboratory of Inorganic Chemistry , 8093 Zurich , Switzerland
| | - Aaron J Rossini
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
| | - Gunnar Jeschke
- ETH Zurich , Department of Chemistry, Laboratory of Inorganic Chemistry , 8093 Zurich , Switzerland
| | - Christophe Copéret
- ETH Zurich , Department of Chemistry, Laboratory of Inorganic Chemistry , 8093 Zurich , Switzerland
| | - Anne Lesage
- Université de Lyon , Institut de Sciences Analytiques (CNRS / ENS de Lyon / UCB-Lyon 1) , Centre de RMN à Très Hauts Champs , 69100 Villeurbanne , France
| | - Paul Tordo
- Aix-Marseille Université , CNRS , ICR UMR 7273 , 13397 Marseille , France . ;
| | - Olivier Ouari
- Aix-Marseille Université , CNRS , ICR UMR 7273 , 13397 Marseille , France . ;
| | - Lyndon Emsley
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland .
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8
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van der Cruijsen EAW, Koers EJ, Sauvée C, Hulse RE, Weingarth M, Ouari O, Perozo E, Tordo P, Baldus M. Biomolecular DNP-Supported NMR Spectroscopy using Site-Directed Spin Labeling. Chemistry 2015; 21:12971-7. [DOI: 10.1002/chem.201501376] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Indexed: 12/24/2022]
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9
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Koers EJ, van der Cruijsen EAW, Rosay M, Weingarth M, Prokofyev A, Sauvée C, Ouari O, van der Zwan J, Pongs O, Tordo P, Maas WE, Baldus M. NMR-based structural biology enhanced by dynamic nuclear polarization at high magnetic field. J Biomol NMR 2014; 60:157-68. [PMID: 25284462 DOI: 10.1007/s10858-014-9865-8] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Accepted: 09/23/2014] [Indexed: 05/04/2023]
Abstract
Dynamic nuclear polarization (DNP) has become a powerful method to enhance spectroscopic sensitivity in the context of magnetic resonance imaging and nuclear magnetic resonance spectroscopy. We show that, compared to DNP at lower field (400 MHz/263 GHz), high field DNP (800 MHz/527 GHz) can significantly enhance spectral resolution and allows exploitation of the paramagnetic relaxation properties of DNP polarizing agents as direct structural probes under magic angle spinning conditions. Applied to a membrane-embedded K(+) channel, this approach allowed us to refine the membrane-embedded channel structure and revealed conformational substates that are present during two different stages of the channel gating cycle. High-field DNP thus offers atomic insight into the role of molecular plasticity during the course of biomolecular function in a complex cellular environment.
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Affiliation(s)
- Eline J Koers
- NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Department of Chemistry, Faculty of Science, Utrecht University, 3584 CH, Utrecht, The Netherlands
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10
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Ziarelli F, Casciola M, Pica M, Donnadio A, Aussenac F, Sauvée C, Capitani D, Viel S. Dynamic nuclear polarisation NMR of nanosized zirconium phosphate polymer fillers. Chem Commun (Camb) 2014; 50:10137-9. [DOI: 10.1039/c4cc02723j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Sauvée C, Rosay M, Casano G, Aussenac F, Weber RT, Ouari O, Tordo P. Rücktitelbild: Highly Efficient, Water-Soluble Polarizing Agents for Dynamic Nuclear Polarization at High Frequency (Angew. Chem. 41/2013). Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201307407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Sauvée C, Rosay M, Casano G, Aussenac F, Weber RT, Ouari O, Tordo P. Back Cover: Highly Efficient, Water-Soluble Polarizing Agents for Dynamic Nuclear Polarization at High Frequency (Angew. Chem. Int. Ed. 41/2013). Angew Chem Int Ed Engl 2013. [DOI: 10.1002/anie.201307407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Gajan D, Schwarzwälder M, Conley MP, Grüning WR, Rossini AJ, Zagdoun A, Lelli M, Yulikov M, Jeschke G, Sauvée C, Ouari O, Tordo P, Veyre L, Lesage A, Thieuleux C, Emsley L, Copéret C. Solid-phase polarization matrixes for dynamic nuclear polarization from homogeneously distributed radicals in mesostructured hybrid silica materials. J Am Chem Soc 2013; 135:15459-66. [PMID: 23978152 DOI: 10.1021/ja405822h] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Mesoporous hybrid silica-organic materials containing homogeneously distributed stable mono- or dinitroxide radicals covalently bound to the silica surface were developed as polarization matrixes for solid-state dynamic nuclear polarization (DNP) NMR experiments. For TEMPO-containing materials impregnated with water or 1,1,2,2-tetrachloroethane, enhancement factors of up to 36 were obtained at ∼100 K and 9.4 T without the need for a glass-forming additive. We show that the homogeneous radical distribution and the subtle balance between the concentration of radical in the material and the fraction of radicals at a sufficient inter-radical distance to promote the cross-effect are the main determinants for the DNP enhancements we obtain. The material, as well as an analogue containing the poorly soluble biradical bTUrea, is used as a polarizing matrix for DNP NMR experiments of solutions containing alanine and pyruvic acid. The analyte is separated from the polarization matrix by simple filtration.
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Affiliation(s)
- David Gajan
- Department of Chemistry, ETH Zürich , CH-8093 Zürich, Switzerland
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14
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Sauvée C, Rosay M, Casano G, Aussenac F, Weber RT, Ouari O, Tordo P. Highly efficient, water-soluble polarizing agents for dynamic nuclear polarization at high frequency. Angew Chem Int Ed Engl 2013; 52:10858-61. [PMID: 23956072 DOI: 10.1002/anie.201304657] [Citation(s) in RCA: 324] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Claire Sauvée
- Aix-Marseille Université, CNRS, ICR UMR 7273, 13397 Marseille cedex 20 (France) http://sites.univ-provence.fr/srep/
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15
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Sauvée C, Schäfer A, Sundén H, Ma JN, Gustavsson AL, Burstein ES, Olsson R. The A-CD analogue of 16β,17α-estriol is a potent and highly selective estrogen receptor β agonist. Med Chem Commun 2013. [DOI: 10.1039/c3md00194f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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