1
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Kwiatkowski G, von Witte G, Däpp A, Kocic J, Hattendorf B, Ernst M, Kozerke S. In vivo MRI of hyperpolarized silicon-29 nanoparticles. Magn Reson Med 2024. [PMID: 39119764 DOI: 10.1002/mrm.30244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 06/26/2024] [Accepted: 07/21/2024] [Indexed: 08/10/2024]
Abstract
PURPOSE The objective of the present work was to test the feasibility of in vivo imaging of hyperpolarized 50-nm silicon-29 (29Si) nanoparticles. METHODS Commercially available, crystalline 50-nm nanoparticles were hyperpolarized using dynamic polarization transfer via the endogenous silicon oxide-silicon defects without the addition of exogenous radicals. Phantom experiments were used to quantify the effect of sample dissolution and various surface coating on T1 and T2 relaxation. The in vivo feasibility of detecting hyperpolarized silicon-29 was tested following intraperitoneal, intragastric, or intratumoral injection in mice and compared with the results obtained with previously reported, large, micrometer-size particles. The tissue clearance of SiNPs was quantified in various organs using inductively coupled plasma optical emission spectroscopy. RESULTS In vivo images obtained after intragastric, intraperitoneal, and intratumoral injection compare favorably between small and large SiNPs. Improved distribution of small SiNPs was observed after intraperitoneal and intragastric injection as compared with micrometer-size SiNPs. Sufficient clearance of nanometer-size SiNPs using ex vivo tissue sample analysis was observed after 14 days following injection, indicating their safe use. CONCLUSION In vivo MRI of hyperpolarized small 50-nm SiNPs is feasible with polarization levels and room-temperature relaxation times comparable to large micrometer-size particles.
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Affiliation(s)
| | - Gevin von Witte
- Institute for Biomedical Engineering, University and ETH Zurich, Switzerland
- Laboratory of Inorganic Chemistry, ETH Zurich, Switzerland
| | - Alexander Däpp
- Laboratory of Inorganic Chemistry, ETH Zurich, Switzerland
| | - Jovana Kocic
- Institute for Molecular Physical Science, ETH Zurich, Switzerland
| | - Bodo Hattendorf
- Institute for Molecular Physical Science, ETH Zurich, Switzerland
| | - Matthias Ernst
- Laboratory of Inorganic Chemistry, ETH Zurich, Switzerland
| | - Sebastian Kozerke
- Institute for Biomedical Engineering, University and ETH Zurich, Switzerland
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2
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Fukazawa J, Mochizuki Y, Kanai S, Miura N, Negoro M, Kagawa A. Real-Time Monitoring of Hydrolysis Reactions of Pyrophosphates with Dissolution Dynamic Nuclear Polarization. J Phys Chem Lett 2024; 15:7288-7294. [PMID: 38980118 DOI: 10.1021/acs.jpclett.4c01456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Dissolution dynamic nuclear polarization (d-DNP) has enabled applications such as the real-time monitoring of chemical reactions. Such applications are mainly for 13C and 15N spins with long spin-lattice relaxation times in the molecules of interest. However, the only applications for phosphorus using d-DNP are pH imaging and nucleation during crystallization due to the short relaxation times. Here we show that it is possible to observe enzyme reactions using d-DNP with phosphorus. Hyperpolarized 31P spins in pyrophosphate were obtained using bullet-DNP, which requires less dilution of highly polarized solid samples. Real-time monitoring of the hydrolysis reaction of pyrophosphate by inorganic pyrophosphatase from baker's yeast at physiological pH and was successfully achieved and the reaction rate was determined. This is an important reaction for a wide range of applications related to medicine, agriculture, and quantum life science.
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Affiliation(s)
- Jun Fukazawa
- Center for Quantum Information and Quantum Biology, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Yuuki Mochizuki
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Sakyo Kanai
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Natsuko Miura
- Department of Applied Biological Chemistry, Graduate School of Agriculture, Osaka Metropolitan University, Sakai, Osaka 599-8231, Japan
| | - Makoto Negoro
- Center for Quantum Information and Quantum Biology, Osaka University, Toyonaka, Osaka 560-0043, Japan
- Institute for Quantum Life Science (iQLS), National Institutes for Quantum and Radiological Science and Technology (QST), Chiba 263-8555, Japan
- Premium Research Institute for Human Metaverse Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Akinori Kagawa
- Center for Quantum Information and Quantum Biology, Osaka University, Toyonaka, Osaka 560-0043, Japan
- Premium Research Institute for Human Metaverse Medicine, Osaka University, Suita, Osaka 565-0871, Japan
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3
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Millen M, Alaniva N, Saliba EP, Overall SA, Däpp A, Pagonakis IG, Sigurdsson ST, Björgvinsdóttir S, Barnes AB. Frequency-Chirped Magic Angle Spinning Dynamic Nuclear Polarization Combined with Electron Decoupling. J Phys Chem Lett 2024; 15:7228-7235. [PMID: 38975905 PMCID: PMC11261599 DOI: 10.1021/acs.jpclett.4c01075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 06/27/2024] [Accepted: 06/28/2024] [Indexed: 07/09/2024]
Abstract
Magic angle spinning (MAS) dynamic nuclear polarization (DNP) increases the signal intensity of solid-state nuclear magnetic resonance. DNP typically uses continuous wave (CW) microwave irradiation close to the resonance frequency of unpaired electron spins. In this study, we demonstrate that frequency-chirped microwaves improve DNP performance under MAS. By modulating the gyrotron anode potential, we generate a train of microwave chirps with a maximum bandwidth of 310 MHz and a maximum incident power on the spinning sample of 18 W. We characterize the efficiency of chirped DNP using the following polarizing agents: TEMTriPol-1, AsymPolPOK, AMUPol, and Finland trityl. The effects of different chirp widths and periods are analyzed at different MAS frequencies and microwave powers. Furthermore, we show that chirped DNP can be combined with electron decoupling to improve signal intensity by 59%, compared to CW DNP without electron decoupling, using Finland trityl as a polarizing agent.
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Affiliation(s)
- Marthe Millen
- Institute
of Molecular Physical Science, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Nicholas Alaniva
- Institute
of Molecular Physical Science, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Edward P. Saliba
- Institute
of Molecular Physical Science, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Sarah A. Overall
- Institute
of Molecular Physical Science, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Alexander Däpp
- Institute
of Molecular Physical Science, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Ioannis Gr. Pagonakis
- Institute
of Molecular Physical Science, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | | | - Snædís Björgvinsdóttir
- Institute
of Molecular Physical Science, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Alexander B. Barnes
- Institute
of Molecular Physical Science, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
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4
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Wiström E, Hyacinthe JN, Lê TP, Gruetter R, Capozzi A. 129Xe Dynamic Nuclear Polarization Demystified: The Influence of the Glassing Matrix on the Radical Properties. J Phys Chem Lett 2024; 15:2957-2965. [PMID: 38453156 PMCID: PMC10961830 DOI: 10.1021/acs.jpclett.4c00177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/14/2024] [Accepted: 02/21/2024] [Indexed: 03/09/2024]
Abstract
129Xe dissolution dynamic nuclear polarization (DNP) is a controversial topic. The gold standard technique for hyperpolarized xenon magnetic resonance imaging (MRI) is spin exchange optical pumping, which received FDA approval in 2022. Nevertheless, the versatility of DNP for enhancing the signal of any NMR active nucleus might provide new perspectives for hyperpolarized 129Xe NMR/MRI. Initial publications about 129Xe DNP underlined the increased complexity in the sample preparation and lower polarization levels when compared to more conventional 13C-labeled molecules, at same experimental conditions, despite very close gyromagnetic ratios. Herein, we introduce, using a Custom Fluid Path system, a user-friendly and very robust sample preparation method. Moreover, investigating the radical properties at real DNP conditions by means of LOngitudinal Detected Electron Spin Resonance, we discovered a dramatic shortening of the electron spin longitudinal relaxation time (T1e) of nitroxyl radicals in xenon DNP samples' matrices, with respect to more commonly used water:glycerol ones. Mitigating those challenges through microwave frequency modulation, we achieved over 20% 129Xe polarization without employing any deuterated solvent.
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Affiliation(s)
- Emma Wiström
- LIFMET,
Institute of Physics, École Polytechnique
Fédérale de Lausanne (EPFL), Station 6, 1015 Lausanne, Switzerland
| | - Jean-Noël Hyacinthe
- LIFMET,
Institute of Physics, École Polytechnique
Fédérale de Lausanne (EPFL), Station 6, 1015 Lausanne, Switzerland
| | - Thanh Phong Lê
- LIFMET,
Institute of Physics, École Polytechnique
Fédérale de Lausanne (EPFL), Station 6, 1015 Lausanne, Switzerland
| | - Rolf Gruetter
- LIFMET,
Institute of Physics, École Polytechnique
Fédérale de Lausanne (EPFL), Station 6, 1015 Lausanne, Switzerland
| | - Andrea Capozzi
- LIFMET,
Institute of Physics, École Polytechnique
Fédérale de Lausanne (EPFL), Station 6, 1015 Lausanne, Switzerland
- HYPERMAG,
Department of Health Technology, Technical
University of Denmark, Building 349, 2800 Kgs Lyngby, Denmark
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5
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Zhao Y, El Mkami H, Hunter RI, Casano G, Ouari O, Smith GM. Large cross-effect dynamic nuclear polarisation enhancements with kilowatt inverting chirped pulses at 94 GHz. Commun Chem 2023; 6:171. [PMID: 37607991 PMCID: PMC10444895 DOI: 10.1038/s42004-023-00963-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 07/25/2023] [Indexed: 08/24/2023] Open
Abstract
Dynamic nuclear polarisation (DNP) is a process that transfers electron spin polarisation to nuclei by applying resonant microwave radiation, and has been widely used to improve the sensitivity of nuclear magnetic resonance (NMR). Here we demonstrate new levels of performance for static cross-effect proton DNP using high peak power chirped inversion pulses at 94 GHz to create a strong polarisation gradient across the inhomogeneously broadened line of the mono-radical 4-amino TEMPO. Enhancements of up to 340 are achieved at an average power of a few hundred mW, with fast build-up times (3 s). Experiments are performed using a home-built wideband kW pulsed electron paramagnetic resonance (EPR) spectrometer operating at 94 GHz, integrated with an NMR detection system. Simultaneous DNP and EPR characterisation of other mono-radicals and biradicals, as a function of temperature, leads to additional insights into limiting relaxation mechanisms and give further motivation for the development of wideband pulsed amplifiers for DNP at higher frequencies.
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Affiliation(s)
- Yujie Zhao
- School of Physics and Astronomy, University of St Andrews, KY16 9SS, Fife, Scotland
| | - Hassane El Mkami
- School of Physics and Astronomy, University of St Andrews, KY16 9SS, Fife, Scotland
| | - Robert I Hunter
- School of Physics and Astronomy, University of St Andrews, KY16 9SS, Fife, Scotland
| | - Gilles Casano
- Aix Marseille University, CNRS, ICR, UMR 7273, F-13013, Marseille, France
| | - Olivier Ouari
- Aix Marseille University, CNRS, ICR, UMR 7273, F-13013, Marseille, France
| | - Graham M Smith
- School of Physics and Astronomy, University of St Andrews, KY16 9SS, Fife, Scotland.
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6
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Dos Santos K, Bertho G, Caradeuc C, Baud V, Montagne A, Abergel D, Giraud N, Baudin M. A Toolbox for Glutamine Use in Dissolution Dynamic Nuclear Polarization: from Enzymatic Reaction Monitoring to the Study of Cellular Metabolic Pathways and Imaging. Chemphyschem 2023; 24:e202300151. [PMID: 36973178 DOI: 10.1002/cphc.202300151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/25/2023] [Accepted: 03/27/2023] [Indexed: 03/29/2023]
Abstract
Glutamine is under scrutiny regarding its metabolic deregulation linked to energetic reprogramming in cancer cells. Many analytical techniques have been used to better understand the impact of the metabolism of amino acids on biological processes, however only a few are suited to work with complex samples. Here, we report the use of a general dissolution dynamic nuclear polarization (D-DNP) formulation using an unexpensive radical as a multipurpose tool to study glutamine, with insights from enzymatic modelling to complex metabolic networks and fast imaging. First, hyperpolarized [5-13 C] glutamine is used as molecular probe to study the kinetic action of two enzymes: L-asparaginase that has been used as an anti-metabolic treatment for cancer, and glutaminase. These results are also compared with those acquired with another hyperpolarized amino acid, [1,4-13 C] asparagine. Second, we explored the use of hyperpolarized (HP) substrates to probe metabolic pathways by monitoring metabolic profiles arising from hyperpolarized glutamine in E. coli extracts. Finally, a highly concentrated sample formulation is proposed for the purpose of fast imaging applications. We think that this approach can be extended to formulate other amino acids as well as other metabolites and provide complementary insights into the analysis of metabolic networks.
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Affiliation(s)
- Karen Dos Santos
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Cité, 45, Rue des Saints Pères, 75006, Paris, France
| | - Gildas Bertho
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Cité, 45, Rue des Saints Pères, 75006, Paris, France
| | - Cédric Caradeuc
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Cité, 45, Rue des Saints Pères, 75006, Paris, France
| | - Véronique Baud
- Laboratoire NF-κB, Différenciation et Cancer, Université Paris Cité, 24, Rue du faubourg Saint Jacques, 75014, Paris, France
| | - Aurélie Montagne
- Laboratoire NF-κB, Différenciation et Cancer, Université Paris Cité, 24, Rue du faubourg Saint Jacques, 75014, Paris, France
| | - Daniel Abergel
- Laboratoire des Biomolécules, LBM, Département de chimie, École Normale Supérieure, PSL Université, Sorbonne Université, 45 Rue d'Ulm, 75005, Paris, France
| | - Nicolas Giraud
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Cité, 45, Rue des Saints Pères, 75006, Paris, France
| | - Mathieu Baudin
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, Université Paris Cité, 45, Rue des Saints Pères, 75006, Paris, France
- Laboratoire des Biomolécules, LBM, Département de chimie, École Normale Supérieure, PSL Université, Sorbonne Université, 45 Rue d'Ulm, 75005, Paris, France
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7
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Lê TP, Hyacinthe JN, Capozzi A. Multi-sample/multi-nucleus parallel polarization and monitoring enabled by a fluid path technology compatible cryogenic probe for dissolution dynamic nuclear polarization. Sci Rep 2023; 13:7962. [PMID: 37198242 DOI: 10.1038/s41598-023-34958-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 05/10/2023] [Indexed: 05/19/2023] Open
Abstract
Low throughput is one of dissolution Dynamic Nuclear Polarization (dDNP) main shortcomings. Especially for clinical and preclinical applications, where direct 13C nuclei polarization is usually pursued, it takes hours to generate one single hyperpolarized (HP) sample. Being able to hyperpolarize more samples at once represents a clear advantage and can expand the range and complexity of the applications. In this work, we present the design and performance of a highly versatile and customizable dDNP cryogenic probe, herein adapted to a 5 T "wet" preclinical polarizer, that can accommodate up to three samples at once and, most importantly, it is capable of monitoring the solid-state spin dynamics of each sample separately, regardless of the kind of radical used and the nuclear species of interest. Within 30 min, the system was able to dispense three HP solutions with high repeatability across the channels (30.0 ± 1.2% carbon polarization for [1-13C]pyruvic acid doped with trityl radical). Moreover, we tested multi-nucleus NMR capability by polarizing and monitoring simultaneously 13C, 1H and 129Xe. Finally, we implemented [1-13C]lactate/[1-13C]pyruvate polarization and back-to-back dissolution and injection in a healthy mouse model to perform multiple-substrate HP Magnetic Resonance Spectroscopy (MRS) at 14.1 T.
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Affiliation(s)
- Thanh Phong Lê
- LIFMET, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), Station 6, 1015, Lausanne, Switzerland
| | - Jean-Noël Hyacinthe
- LIFMET, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), Station 6, 1015, Lausanne, Switzerland
- Image Guided Intervention Laboratory, Department of Radiology and Medical Informatics, University of Geneva, 4 Rue Gabrielle - Perret - Gentil, 1211, Geneva, Switzerland
- Geneva School of Health Sciences, HES-SO University of Applied Sciences and Arts Western Switzerland, 47 Avenue de Champel, 1206, Geneva, Switzerland
| | - Andrea Capozzi
- LIFMET, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), Station 6, 1015, Lausanne, Switzerland.
- HYPERMAG, Department of Health Technology, Technical University of Denmark, Building 349, 2800, Kgs Lyngby, Denmark.
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8
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Eills J, Budker D, Cavagnero S, Chekmenev EY, Elliott SJ, Jannin S, Lesage A, Matysik J, Meersmann T, Prisner T, Reimer JA, Yang H, Koptyug IV. Spin Hyperpolarization in Modern Magnetic Resonance. Chem Rev 2023; 123:1417-1551. [PMID: 36701528 PMCID: PMC9951229 DOI: 10.1021/acs.chemrev.2c00534] [Citation(s) in RCA: 64] [Impact Index Per Article: 64.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Magnetic resonance techniques are successfully utilized in a broad range of scientific disciplines and in various practical applications, with medical magnetic resonance imaging being the most widely known example. Currently, both fundamental and applied magnetic resonance are enjoying a major boost owing to the rapidly developing field of spin hyperpolarization. Hyperpolarization techniques are able to enhance signal intensities in magnetic resonance by several orders of magnitude, and thus to largely overcome its major disadvantage of relatively low sensitivity. This provides new impetus for existing applications of magnetic resonance and opens the gates to exciting new possibilities. In this review, we provide a unified picture of the many methods and techniques that fall under the umbrella term "hyperpolarization" but are currently seldom perceived as integral parts of the same field. Specifically, before delving into the individual techniques, we provide a detailed analysis of the underlying principles of spin hyperpolarization. We attempt to uncover and classify the origins of hyperpolarization, to establish its sources and the specific mechanisms that enable the flow of polarization from a source to the target spins. We then give a more detailed analysis of individual hyperpolarization techniques: the mechanisms by which they work, fundamental and technical requirements, characteristic applications, unresolved issues, and possible future directions. We are seeing a continuous growth of activity in the field of spin hyperpolarization, and we expect the field to flourish as new and improved hyperpolarization techniques are implemented. Some key areas for development are in prolonging polarization lifetimes, making hyperpolarization techniques more generally applicable to chemical/biological systems, reducing the technical and equipment requirements, and creating more efficient excitation and detection schemes. We hope this review will facilitate the sharing of knowledge between subfields within the broad topic of hyperpolarization, to help overcome existing challenges in magnetic resonance and enable novel applications.
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Affiliation(s)
- James Eills
- Institute
for Bioengineering of Catalonia, Barcelona
Institute of Science and Technology, 08028Barcelona, Spain,
| | - Dmitry Budker
- Johannes
Gutenberg-Universität Mainz, 55128Mainz, Germany,Helmholtz-Institut,
GSI Helmholtzzentrum für Schwerionenforschung, 55128Mainz, Germany,Department
of Physics, UC Berkeley, Berkeley, California94720, United States
| | - Silvia Cavagnero
- Department
of Chemistry, University of Wisconsin, Madison, Madison, Wisconsin53706, United States
| | - Eduard Y. Chekmenev
- Department
of Chemistry, Integrative Biosciences (IBio), Karmanos Cancer Institute
(KCI), Wayne State University, Detroit, Michigan48202, United States,Russian
Academy of Sciences, Moscow119991, Russia
| | - Stuart J. Elliott
- Molecular
Sciences Research Hub, Imperial College
London, LondonW12 0BZ, United Kingdom
| | - Sami Jannin
- Centre
de RMN à Hauts Champs de Lyon, Université
de Lyon, CNRS, ENS Lyon, Université Lyon 1, 69100Villeurbanne, France
| | - Anne Lesage
- Centre
de RMN à Hauts Champs de Lyon, Université
de Lyon, CNRS, ENS Lyon, Université Lyon 1, 69100Villeurbanne, France
| | - Jörg Matysik
- Institut
für Analytische Chemie, Universität
Leipzig, Linnéstr. 3, 04103Leipzig, Germany
| | - Thomas Meersmann
- Sir
Peter Mansfield Imaging Centre, University Park, School of Medicine, University of Nottingham, NottinghamNG7 2RD, United Kingdom
| | - Thomas Prisner
- Institute
of Physical and Theoretical Chemistry and Center of Biomolecular Magnetic
Resonance, Goethe University Frankfurt, , 60438Frankfurt
am Main, Germany
| | - Jeffrey A. Reimer
- Department
of Chemical and Biomolecular Engineering, UC Berkeley, and Materials Science Division, Lawrence Berkeley National
Laboratory, Berkeley, California94720, United States
| | - Hanming Yang
- Department
of Chemistry, University of Wisconsin, Madison, Madison, Wisconsin53706, United States
| | - Igor V. Koptyug
- International Tomography Center, Siberian
Branch of the Russian Academy
of Sciences, 630090Novosibirsk, Russia,
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9
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Picazo-Frutos R, Stern Q, Blanchard JW, Cala O, Ceillier M, Cousin SF, Eills J, Elliott SJ, Jannin S, Budker D. Zero- to Ultralow-Field Nuclear Magnetic Resonance Enhanced with Dissolution Dynamic Nuclear Polarization. Anal Chem 2023; 95:720-729. [PMID: 36563171 DOI: 10.1021/acs.analchem.2c02649] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Zero- to ultralow-field nuclear magnetic resonance is a modality of magnetic resonance experiment which does not require strong superconducting magnets. Contrary to conventional high-field nuclear magnetic resonance, it has the advantage of allowing high-resolution detection of nuclear magnetism through metal as well as within heterogeneous media. To achieve high sensitivity, it is common to couple zero-field nuclear magnetic resonance with hyperpolarization techniques. To date, the most common technique is parahydrogen-induced polarization, which is only compatible with a small number of compounds. In this article, we establish dissolution dynamic nuclear polarization as a versatile method to enhance signals in zero-field nuclear magnetic resonance experiments on sample mixtures of [13C]sodium formate, [1-13C]glycine, and [2-13C]sodium acetate, and our technique is immediately extendable to a broad range of molecules with >1 s relaxation times. We find signal enhancements of up to 11,000 compared with thermal prepolarization in a 2 T permanent magnet. To increase the signal in future experiments, we investigate the relaxation effects of the TEMPOL radicals used for the hyperpolarization process at zero- and ultralow-fields.
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Affiliation(s)
- Román Picazo-Frutos
- Helmholtz-Institut Mainz, GSI Helmholtzzentrum für Schwerionenforschung, Mainz55128, Germany.,Johannes Gutenberg-Universität Mainz, Mainz55128, Germany
| | - Quentin Stern
- Univ Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100Villeurbanne, France
| | - John W Blanchard
- Helmholtz-Institut Mainz, GSI Helmholtzzentrum für Schwerionenforschung, Mainz55128, Germany
| | - Olivier Cala
- Univ Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100Villeurbanne, France
| | - Morgan Ceillier
- Univ Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100Villeurbanne, France
| | | | - James Eills
- Helmholtz-Institut Mainz, GSI Helmholtzzentrum für Schwerionenforschung, Mainz55128, Germany.,Johannes Gutenberg-Universität Mainz, Mainz55128, Germany.,Institute for Bioengineering of Catalonia, Baldiri Reixac 10-12, Barcelona08028, Spain
| | - Stuart J Elliott
- Univ Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100Villeurbanne, France.,Molecular Sciences Research Hub, Imperial College London, LondonW12 0BZ, U.K
| | - Sami Jannin
- Univ Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100Villeurbanne, France
| | - Dmitry Budker
- Helmholtz-Institut Mainz, GSI Helmholtzzentrum für Schwerionenforschung, Mainz55128, Germany.,Johannes Gutenberg-Universität Mainz, Mainz55128, Germany
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10
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Shimon D, Cantwell K, Joseph L, Ramanathan C. Room temperature DNP of diamond powder using frequency modulation. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2022; 122:101833. [PMID: 36209552 DOI: 10.1016/j.ssnmr.2022.101833] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 09/15/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
Dynamic nuclear polarization (DNP) is a method of enhancing NMR signals via the transfer of polarization from electron spins to nuclear spins using microwave (MW) irradiation. In most cases, monochromatic continuous-wave (MCW) MW irradiation is used. Recently, several groups have shown that frequency modulation of the MW irradiation can result in an additional increase in DNP enhancement above that obtained with MCW. The effect of frequency modulation on the solid effect (SE) and the cross effect (CE) has previously been studied using the stable organic radical 4-hydroxy TEMPO (TEMPOL) at temperatures under 20 K. Here, in addition to the SE and CE, we discuss the effect of frequency modulation on the Overhauser effect (OE) and the truncated CE (tCE) in the room-temperature 13C-DNP of diamond powders. We recently showed that diamond powders can exhibit multiple DNP mechanisms simultaneously due to the heterogeneity of P1 (substitutional nitrogen) environments within diamond crystallites. We explore how the two parameters that define the frequency modulation: (i) the Modulation frequency, fm (how fast the microwave frequency is varied) and (ii) the Modulation amplitude, Δω (the magnitude of the change in microwave frequency) influence the enhancement obtained via each mechanism. Frequency modulation during DNP not only allows us to improve DNP enhancement, but also gives us a way to control which DNP mechanism is most active. By choosing the appropriate modulation parameters, we can selectively enhance some mechanisms while simultaneously suppressing others.
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Affiliation(s)
- Daphna Shimon
- Institute of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra, Givat Ram, Jerusalem, 9190401, Israel.
| | - Kelly Cantwell
- Department of Physics and Astronomy, Dartmouth College, Hanover, NH, 03755, USA
| | - Linta Joseph
- Department of Physics and Astronomy, Dartmouth College, Hanover, NH, 03755, USA
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11
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Negroni M, Turhan E, Kress T, Ceillier M, Jannin S, Kurzbach D. Frémy’s Salt as a Low-Persistence Hyperpolarization Agent: Efficient Dynamic Nuclear Polarization Plus Rapid Radical Scavenging. J Am Chem Soc 2022; 144:20680-20686. [PMID: 36322908 PMCID: PMC9673139 DOI: 10.1021/jacs.2c07960] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
![]()
Nuclear magnetic resonance (NMR) spectroscopy is a key
technique
for molecular structure determination in solution. However, due to
its low sensitivity, many efforts have been made to improve signal
strengths and reduce the required substrate amounts. In this regard,
dissolution dynamic nuclear polarization (DDNP) is a versatile approach
as signal enhancements of over 10 000-fold are achievable.
Samples are signal-enhanced ex situ by transferring
electronic polarization from radicals to nuclear spins before dissolving
and shuttling the boosted sample to an NMR spectrometer for detection.
However, the applicability of DDNP suffers from one major drawback,
namely, paramagnetic relaxation enhancements (PREs) that critically
reduce relaxation times due to the codissolved radicals. PREs are
the primary source of polarization losses canceling the signal improvements
obtained by DNP. We solve this problem by using potassium nitrosodisulfonate
(Frémy’s salt) as polarization agent (PA), which provides
high nuclear spin polarization and allows for rapid scavenging under
mild reducing conditions. We demonstrate the potential of Frémy’s
salt, (i) showing that both 1H and 13C polarization
of ∼30% can be achieved and (ii) describing a hybrid sample
shuttling system (HySSS) that can be used with any DDNP/NMR combination
to remove the PA before NMR detection. This gadget mixes the hyperpolarized
solution with a radical scavenger and injects it into an NMR tube,
providing, within a few seconds, quantitatively radical-free, highly
polarized solutions. The cost efficiency and broad availability of
Frémy’s salt might facilitate the use of DDNP in many
fields of research.
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Affiliation(s)
- Mattia Negroni
- Faculty of Chemistry, Institute of Biological Chemistry, University Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Ertan Turhan
- Faculty of Chemistry, Institute of Biological Chemistry, University Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Thomas Kress
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, U.K
| | - Morgan Ceillier
- Centre de Résonance Magnétique Nucléaire à Très Hauts Champs (UMR 5082) Université de Lyon/CNRS/Université Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne, France
| | - Sami Jannin
- Centre de Résonance Magnétique Nucléaire à Très Hauts Champs (UMR 5082) Université de Lyon/CNRS/Université Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne, France
| | - Dennis Kurzbach
- Faculty of Chemistry, Institute of Biological Chemistry, University Vienna, Währinger Straße 38, 1090 Vienna, Austria
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12
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Dey A, Charrier B, Lemaitre K, Ribay V, Eshchenko D, Schnell M, Melzi R, Stern Q, Cousin S, Kempf J, Jannin S, Dumez JN, Giraudeau P. Fine optimization of a dissolution dynamic nuclear polarization experimental setting for 13C NMR of metabolic samples. MAGNETIC RESONANCE (GOTTINGEN, GERMANY) 2022; 3:183-202. [PMID: 37904870 PMCID: PMC10583282 DOI: 10.5194/mr-3-183-2022] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 09/16/2022] [Indexed: 11/01/2023]
Abstract
NMR-based analysis of metabolite mixtures provides crucial information on biological systems but mostly relies on 1D 1 H experiments for maximizing sensitivity. However, strong peak overlap of 1 H spectra often is a limitation for the analysis of inherently complex biological mixtures. Dissolution dynamic nuclear polarization (d-DNP) improves NMR sensitivity by several orders of magnitude, which enables 13 C NMR-based analysis of metabolites at natural abundance. We have recently demonstrated the successful introduction of d-DNP into a full untargeted metabolomics workflow applied to the study of plant metabolism. Here we describe the systematic optimization of d-DNP experimental settings for experiments at natural 13 C abundance and show how the resolution, sensitivity, and ultimately the number of detectable signals improve as a result. We have systematically optimized the parameters involved (in a semi-automated prototype d-DNP system, from sample preparation to signal detection, aiming at providing an optimization guide for potential users of such a system, who may not be experts in instrumental development). The optimization procedure makes it possible to detect previously inaccessible protonated 13 C signals of metabolites at natural abundance with at least 4 times improved line shape and a high repeatability compared to a previously reported d-DNP-enhanced untargeted metabolomic study. This extends the application scope of hyperpolarized 13 C NMR at natural abundance and paves the way to a more general use of DNP-hyperpolarized NMR in metabolomics studies.
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Affiliation(s)
- Arnab Dey
- Nantes Université, CNRS, CEISAM UMR 6230, 44000 Nantes, France
| | - Benoît Charrier
- Nantes Université, CNRS, CEISAM UMR 6230, 44000 Nantes, France
| | - Karine Lemaitre
- Nantes Université, CNRS, CEISAM UMR 6230, 44000 Nantes, France
| | - Victor Ribay
- Nantes Université, CNRS, CEISAM UMR 6230, 44000 Nantes, France
| | - Dmitry Eshchenko
- Bruker Biospin, Industriestrasse 26, 8117 Fällanden, Switzerland
| | - Marc Schnell
- Bruker Biospin, Industriestrasse 26, 8117 Fällanden, Switzerland
| | - Roberto Melzi
- Bruker Biospin, Viale V. Lancetti 43, 20158 Milan, Italy
| | - Quentin Stern
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1,
ENS de Lyon, Centre de RMN à Très Hauts Champs (CRMN), UMR5082,
69100 Villeurbanne, France
| | | | | | - Sami Jannin
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1,
ENS de Lyon, Centre de RMN à Très Hauts Champs (CRMN), UMR5082,
69100 Villeurbanne, France
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13
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Wili N, Ardenkjær-Larsen J, Jeschke G. Reverse dynamic nuclear polarisation for indirect detection of nuclear spins close to unpaired electrons. MAGNETIC RESONANCE (GOTTINGEN, GERMANY) 2022; 3:161-168. [PMID: 37904869 PMCID: PMC10539835 DOI: 10.5194/mr-3-161-2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 08/01/2022] [Indexed: 11/01/2023]
Abstract
Polarisation transfer schemes and indirect detection are central to magnetic resonance. Using the trityl radical OX063 and a pulse electron paramagnetic resonance spectrometer operating in the Q-band (35 GHz, 1.2 T), we show here that it is possible to use pulsed dynamic nuclear polarisation (DNP) to transfer polarisation from electrons to protons and back. The latter is achieved by first saturating the electrons and then simply using a reverse DNP step. A variable mixing time between DNP and reverse DNP allows us to investigate the decay of polarisation on protons in the vicinity of the electrons. We qualitatively investigate the influence of solvent deuteration, temperature, and electron concentration. We expect reverse DNP to be useful in the investigation of nuclear spin diffusion and envisage its use in electron-nuclear double-resonance (ENDOR) experiments.
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Affiliation(s)
- Nino Wili
- Department of Chemistry and Applied Biosciences, Laboratory of Physical Chemistry, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - Jan Henrik Ardenkjær-Larsen
- Department of Health Technology, Center for Hyperpolarization in Magnetic Resonance, Technical University of Denmark, Building 349, 2800 Kgs Lyngby, Denmark
| | - Gunnar Jeschke
- Department of Chemistry and Applied Biosciences, Laboratory of Physical Chemistry, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
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14
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Performance and reproducibility of 13C and 15N hyperpolarization using a cryogen-free DNP polarizer. Sci Rep 2022; 12:11694. [PMID: 35803961 PMCID: PMC9270333 DOI: 10.1038/s41598-022-15380-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 06/23/2022] [Indexed: 12/02/2022] Open
Abstract
The setup, operational procedures and performance of a cryogen-free device for producing hyperpolarized contrast agents using dissolution dynamic nuclear polarization (dDNP) in a preclinical imaging center is described. The polarization was optimized using the solid-state, DNP-enhanced NMR signal to calibrate the sample position, microwave and NMR frequency and power and flip angle. The polarization of a standard formulation to yield ~ 4 mL, 60 mM 1-13C-pyruvic acid in an aqueous solution was quantified in five experiments to P(13C) = (38 ± 6) % (19 ± 1) s after dissolution. The mono-exponential time constant of the build-up of the solid-state polarization was quantified to (1032 ± 22) s. We achieved a duty cycle of 1.5 h that includes sample loading, monitoring the polarization build-up, dissolution and preparation for the next run. After injection of the contrast agent in vivo, pyruvate, pyruvate hydrate, lactate, and alanine were observed, by measuring metabolite maps. Based on this work sequence, hyperpolarized 15N urea was obtained (P(15N) = (5.6 ± 0.8) % (30 ± 3) s after dissolution).
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15
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Shimon D, Kaminker I. A transition from solid effect to indirect cross effect with broadband microwave irradiation. Phys Chem Chem Phys 2022; 24:7311-7322. [PMID: 35262101 DOI: 10.1039/d1cp05096f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Dynamic nuclear polarization (DNP) at high magnetic fields has become a prominent technique for signal enhancement in nuclear magnetic resonance (NMR). In static samples, the highest DNP enhancement is usually observed for high radical concentrations in the range of 15-40 mM. Under these conditions, the dominant DNP mechanism for broad-line radicals is the electron-electron spectral-diffusion-based indirect cross effect (iCE). To further increase the DNP performance, broadband microwave irradiation is often applied. Until now, the theory of iCE was not rigorously combined with broadband microwave irradiation. This paper fills this gap by extending the iCE theory to explicitly include broadband irradiation. We demonstrate that our theory allows for quantitative fitting of the DNP spectra lineshapes using four different datasets acquired at 3.4 T and 7 T. We find that the DNP mechanism changes with an increase in the excitation bandwidth. While with narrowband continuous-wave irradiation the DNP mechanism is a combination of the solid effect (SE) and iCE, it shifts toward iCE with increasing excitation bandwidth until, at high bandwidth, the iCE completely dominates the DNP spectrum - this effect was not accounted for previously.
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Affiliation(s)
- D Shimon
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - I Kaminker
- School of Chemistry, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel.
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16
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Koptyug IV, Stern Q, Jannin S, Elliott SJ. Frozen water NMR lineshape analysis enables absolute polarization quantification. Phys Chem Chem Phys 2022; 24:5956-5964. [PMID: 35195621 DOI: 10.1039/d1cp05127j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Typical magnetic resonance experiments are routinely limited by weak signal responses. In some cases, the low intrinsic sensitivity can be alleviated by the implementation of hyperpolarization technologies. Dissolution-dynamic nuclear polarization offers a means of hyperpolarizing small molecules. Hyperpolarized water is employed in several dynamic nuclear polarization studies, and hence accurate and rapid quantification of the 1H polarization level is of utmost importance. The solid-state nuclear magnetic resonance spectrum of water acquired under dissolution-dynamic nuclear polarization conditions has revealed lineshapes which become asymmetric at high levels of 1H polarization, which is an interesting fundamental problem in itself, but also complicates data interpretation and can prevent correct estimations of polarization levels achieved. In previous studies, attempts to simulate the 1H spectral lineshape of water as a function of the 1H polarization led to significant disagreement with the experimental results. Here we propose and demonstrate that such simulations, and therefore polarization quantification, can be implemented accurately, in particular by taking into account the detector dead time during 1H signal acquisition that can lead to severe spectral distortions. Based on these findings, we employed an echo-based radiofrequency pulse sequence to achieve distortion-free 1H spectra of hyperpolarized water, and adequate simulations of these echo-based spectra were implemented to extract the absolute 1H polarization level from the hyperpolarized water signal only, thus alleviating the need for lengthy and insensitive measurements of thermal equilibrium signals.
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Affiliation(s)
- Igor V Koptyug
- International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk, 630090, Russia
| | - Quentin Stern
- Univ. Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100 Villeurbanne, France.
| | - Sami Jannin
- Univ. Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100 Villeurbanne, France.
| | - Stuart J Elliott
- Univ. Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100 Villeurbanne, France.
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17
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Guarin D, Carnevale D, Baudin M, Pelupessy P, Abergel D, Bodenhausen G. Effects of Microwave Gating on Nuclear Spin Echoes in Dynamic Nuclear Polarization. J Phys Chem Lett 2022; 13:175-182. [PMID: 34965134 DOI: 10.1021/acs.jpclett.1c03436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Dipolar or quadrupolar echoes allow one to observe undistorted powder patterns, in contrast to simple Fourier transformations of free induction decays (FIDs). In this work, the buildup of proton polarization due to dynamic nuclear polarization (DNP) is monitored by observing echoes rather than FIDs. When the microwave irradiation is interrupted during the buildup of DNP, the electrons relax back to their Boltzmann distribution at high fields (B0 = 6.7 T) and low temperatures 1.2 < Tsample < 4.0 K, so that dipolar flip-flop-flip terms involving two electrons and one proton become largely ineffective as a mechanism of proton decoherence. This leads to a prolongation of the nuclear coherence lifetime T2'(1H). The increase in T2'(1H) leads to transient surges of the amplitudes of spin echoes. Conversely, transient slumps of spin echoes are observed when the microwave irradiation is switched back on, due to a shortening of nuclear coherence lifetimes.
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Affiliation(s)
- David Guarin
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Diego Carnevale
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Mathieu Baudin
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
- Université de Paris, Laboratoire de Chimie et Biologie Pharmacologiques et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, 75006, Paris, France
| | - Philippe Pelupessy
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Daniel Abergel
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Geoffrey Bodenhausen
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
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18
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Elliott SJ, Stern Q, Cala O, Jannin S. Protonation tuned dipolar order mediated 1H→ 13C cross-polarization for dissolution-dynamic nuclear polarization experiments. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2021; 116:101762. [PMID: 34823210 DOI: 10.1016/j.ssnmr.2021.101762] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 10/12/2021] [Accepted: 10/13/2021] [Indexed: 06/13/2023]
Abstract
A strategy of dipolar order mediated nuclear spin polarization transfer has recently been combined with dissolution-dynamic nuclear polarization (dDNP) and improved by employing optimized shaped radiofrequency pulses and suitable molecular modifications. In the context of dDNP experiments, this offers a promising means of transferring polarization from high-gamma 1H spins to insensitive 13C spins with lower peak power and lower energy compared with state-of-the-art cross-polarization schemes. The role of local molecular groups and the glassing matrix protonation level are both postulated to play a key role in the polarization transfer pathway via an intermediary reservoir of dipolar spin order. To gain appreciation of the mechanisms involved in the dipolar order mediated polarization transfer under dDNP conditions, we investigate herein the influence of the pivotal characteristics of the sample makeup: (i) revising the protonation level for the constituents of the DNP glass; and (ii) utilizing deuterated molecular derivatives. Experimental demonstrations are presented for the case of [1-13C]sodium acetate. We find that the proton sample molarity has a large impact on both the optimal parameters and the performance of the dipolar order mediated cross-polarization sequence, with the 13C signal build-up time drastically shortened in the case of high solvent protonation levels. In the case of a deuterated molecular derivative, we observe that the nearby 2H substituted methyl group is deleterious to the 1H→13C transfer phenomenon (particularly at low levels of sample protonation). Overall, increased solvent protonation makes the dipolar order governed polarization transfer significantly faster and more efficient. This study sheds light on the influential sample formulation traits which govern the dipolar order-controlled transfer of polarization and indicates that the polarization transfer efficiencies of deuterated molecules can be boosted and reach high performances simply by adequate solvent protonation.
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Affiliation(s)
- Stuart J Elliott
- Univ. Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100, Villeurbanne, France.
| | - Quentin Stern
- Univ. Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100, Villeurbanne, France
| | - Olivier Cala
- Univ. Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100, Villeurbanne, France
| | - Sami Jannin
- Univ. Lyon, CNRS, ENS Lyon, UCBL, Université de Lyon, CRMN UMR 5280, 69100, Villeurbanne, France
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19
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Zanella CC, Capozzi A, Yoshihara HAI, Radaelli A, Mackowiak ALC, Arn LP, Gruetter R, Bastiaansen JAM. Radical-free hyperpolarized MRI using endogenously occurring pyruvate analogues and UV-induced nonpersistent radicals. NMR IN BIOMEDICINE 2021; 34:e4584. [PMID: 34245482 PMCID: PMC8518970 DOI: 10.1002/nbm.4584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/19/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
It was recently demonstrated that nonpersistent radicals can be generated in frozen solutions of metabolites such as pyruvate by irradiation with UV light, enabling radical-free dissolution dynamic nuclear polarization. Although pyruvate is endogenous, the presence of pyruvate may interfere with metabolic processes or the detection of pyruvate as a metabolic product, making it potentially unsuitable as a polarizing agent. Therefore, the aim of the current study was to characterize solutions containing endogenously occurring alternatives to pyruvate as UV-induced nonpersistent radical precursors for in vivo hyperpolarized MRI. The metabolites alpha-ketovalerate (αkV) and alpha-ketobutyrate (αkB) are analogues of pyruvate and were chosen as potential radical precursors. Sample formulations containing αkV and αkB were studied with UV-visible spectroscopy, irradiated with UV light, and their nonpersistent radical yields were quantified with electron spin resonance and compared with pyruvate. The addition of 13 C-labeled substrates to the sample matrix altered the radical yield of the precursors. Using αkB increased the 13 C-labeled glucose liquid-state polarization to 16.3% ± 1.3% compared with 13.3% ± 1.5% obtained with pyruvate, and 8.9% ± 2.1% with αkV. For [1-13 C]butyric acid, polarization levels of 12.1% ± 1.1% for αkV, 12.9% ± 1.7% for αkB, 1.5% ± 0.2% for OX063 and 18.7% ± 0.7% for Finland trityl, were achieved. Hyperpolarized [1-13 C]butyrate metabolism in the heart revealed label incorporation into [1-13 C]acetylcarnitine, [1-13 C]acetoacetate, [1-13 C]butyrylcarnitine, [5-13 C]glutamate and [5-13 C]citrate. This study demonstrates the potential of αkV and αkB as endogenous polarizing agents for in vivo radical-free hyperpolarized MRI. UV-induced, nonpersistent radicals generated in endogenous metabolites enable high polarization without requiring radical filtration, thus simplifying the quality-control tests in clinical applications.
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Affiliation(s)
| | - Andrea Capozzi
- Laboratory of Functional and Metabolic Imaging, EPFLLausanneSwitzerland
| | | | - Alice Radaelli
- Laboratory of Functional and Metabolic Imaging, EPFLLausanneSwitzerland
| | - Adèle L. C. Mackowiak
- Department of Diagnostic and Interventional RadiologyLausanne University Hospital (CHUV) and University of Lausanne (UNIL)LausanneSwitzerland
| | - Lionel P. Arn
- Department of Diagnostic and Interventional RadiologyLausanne University Hospital (CHUV) and University of Lausanne (UNIL)LausanneSwitzerland
| | - Rolf Gruetter
- Laboratory of Functional and Metabolic Imaging, EPFLLausanneSwitzerland
| | - Jessica A. M. Bastiaansen
- Department of Diagnostic and Interventional RadiologyLausanne University Hospital (CHUV) and University of Lausanne (UNIL)LausanneSwitzerland
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20
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Equbal A, Jain SK, Li Y, Tagami K, Wang X, Han S. Role of electron spin dynamics and coupling network in designing dynamic nuclear polarization. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2021; 126-127:1-16. [PMID: 34852921 DOI: 10.1016/j.pnmrs.2021.05.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Accepted: 05/22/2021] [Indexed: 06/13/2023]
Abstract
Dynamic nuclear polarization (DNP) has emerged as a powerful sensitivity booster of nuclear magnetic resonance (NMR) spectroscopy for the characterization of biological solids, catalysts and other functional materials, but is yet to reach its full potential. DNP transfers the high polarization of electron spins to nuclear spins using microwave irradiation as a perturbation. A major focus in DNP research is to improve its efficiency at conditions germane to solid-state NMR, at high magnetic fields and fast magic-angle spinning. In this review, we highlight three key strategies towards designing DNP experiments: time-domain "smart" microwave manipulation to optimize and/or modulate electron spin polarization, EPR detection under operational DNP conditions to decipher the underlying electron spin dynamics, and quantum mechanical simulations of coupled electron spins to gain microscopic insights into the DNP mechanism. These strategies are aimed at understanding and modeling the properties of the electron spin dynamics and coupling network. The outcome of these strategies is expected to be key to developing next-generation polarizing agents and DNP methods.
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Affiliation(s)
- Asif Equbal
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106, United States
| | - Sheetal Kumar Jain
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106, United States
| | - Yuanxin Li
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106, United States
| | - Kan Tagami
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106, United States
| | - Xiaoling Wang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106, United States; Department of Physics, University of California, Santa Barbara, Santa Barbara, CA 93106, United States
| | - Songi Han
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106, United States; Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, CA 93106, United States.
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21
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Elliott SJ, Stern Q, Ceillier M, El Daraï T, Cousin SF, Cala O, Jannin S. Practical dissolution dynamic nuclear polarization. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2021; 126-127:59-100. [PMID: 34852925 DOI: 10.1016/j.pnmrs.2021.04.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 04/09/2021] [Indexed: 06/13/2023]
Abstract
This review article intends to provide insightful advice for dissolution-dynamic nuclear polarization in the form of a practical handbook. The goal is to aid research groups to effectively perform such experiments in their own laboratories. Previous review articles on this subject have covered a large number of useful topics including instrumentation, experimentation, theory, etc. The topics to be addressed here will include tips for sample preparation and for checking sample health; a checklist to correctly diagnose system faults and perform general maintenance; the necessary mechanical requirements regarding sample dissolution; and aids for accurate, fast and reliable polarization quantification. Herein, the challenges and limitations of each stage of a typical dissolution-dynamic nuclear polarization experiment are presented, with the focus being on how to quickly and simply overcome some of the limitations often encountered in the laboratory.
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Affiliation(s)
- Stuart J Elliott
- Centre de Résonance Magnétique Nucléaire à Très Hauts Champs - UMR 5082 Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne, France
| | - Quentin Stern
- Centre de Résonance Magnétique Nucléaire à Très Hauts Champs - UMR 5082 Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne, France
| | - Morgan Ceillier
- Centre de Résonance Magnétique Nucléaire à Très Hauts Champs - UMR 5082 Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne, France
| | - Théo El Daraï
- Centre de Résonance Magnétique Nucléaire à Très Hauts Champs - UMR 5082 Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne, France
| | - Samuel F Cousin
- Centre de Résonance Magnétique Nucléaire à Très Hauts Champs - UMR 5082 Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne, France
| | - Olivier Cala
- Centre de Résonance Magnétique Nucléaire à Très Hauts Champs - UMR 5082 Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne, France
| | - Sami Jannin
- Centre de Résonance Magnétique Nucléaire à Très Hauts Champs - UMR 5082 Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne, France.
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22
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Marko A, Sojka A, Laguta O, Neugebauer P. Simulation of nitrogen nuclear spin magnetization of liquid solved nitroxides. Phys Chem Chem Phys 2021; 23:17310-17322. [PMID: 34346404 PMCID: PMC8371994 DOI: 10.1039/d0cp06071b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 06/25/2021] [Indexed: 12/15/2022]
Abstract
Nitroxide radicals are widely used in electron paramagnetic resonance (EPR) applications. Nitroxides are stable organic radicals containing the N-O˙ group with hyperfine coupled unpaired electron and nitrogen nuclear spins. In the past, much attention was devoted to studying nitroxide EPR spectra and electron spin magnetization evolution under various experimental conditions. However, the dynamics of nitrogen nuclear spin has not been investigated in detail so far. In this work, we performed quantitative prediction and simulation of nitrogen nuclear spin magnetization evolution in several magnetic resonance experiments. Our research was focused on fast rotating nitroxide radicals in liquid solutions. We used a general approach allowing us to compute electron and nitrogen nuclear spin magnetization from the same time-dependent spin density matrix obtained by solving the Liouville/von Neumann equation. We investigated the nitrogen nuclear spin dynamics subjected to various radiofrequency magnetic fields. Furthermore, we predicted a large dynamic nuclear polarization of nitrogen upon nitroxide irradiation with microwaves and analyzed its effect on the nitroxide EPR saturation factor.
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Affiliation(s)
- Andriy Marko
- Central European Institute of Technology, Brno University of TechnologyPurkynova-Str. 12361200BrnoCzech Republic
| | - Antonin Sojka
- Central European Institute of Technology, Brno University of TechnologyPurkynova-Str. 12361200BrnoCzech Republic
| | - Oleksii Laguta
- Central European Institute of Technology, Brno University of TechnologyPurkynova-Str. 12361200BrnoCzech Republic
| | - Petr Neugebauer
- Central European Institute of Technology, Brno University of TechnologyPurkynova-Str. 12361200BrnoCzech Republic
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23
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Elliott S, Stern Q, Jannin S. Solid-state 1H spin polarimetry by 13CH 3 nuclear magnetic resonance. MAGNETIC RESONANCE (GOTTINGEN, GERMANY) 2021; 2:643-652. [PMID: 37905218 PMCID: PMC10539844 DOI: 10.5194/mr-2-643-2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 08/02/2021] [Indexed: 11/01/2023]
Abstract
Dissolution dynamic nuclear polarization is used to prepare nuclear spin polarizations approaching unity. At present, 1 H polarization quantification in the solid state remains fastidious due to the requirement of measuring thermal equilibrium signals. Line shape polarimetry of solid-state nuclear magnetic resonance spectra is used to determine several useful properties regarding the spin system under investigation. In the case of highly polarized nuclear spins, such as those prepared under the conditions of dissolution dynamic nuclear polarization experiments, the absolute polarization of a particular isotopic species within the sample may be directly inferred from the characteristics of the corresponding resonance line shape. In situations where direct measurements of polarization are complicated by deleterious phenomena, indirect estimates of polarization using coupled heteronuclear spins prove informative. We present a simple analysis of the 13 C spectral line shape of [2-13 C]sodium acetate based on the normalized deviation of the centre of gravity of the 13 C peaks, which can be used to indirectly evaluate the proton polarization of the methyl group moiety and very likely the entire sample in the case of rapid and homogeneous 1 H-1 H spin diffusion. For the case of positive microwave irradiation, 1 H polarization was found to increase with an increasing normalized centre of gravity deviation. These results suggest that, as a dopant, [2-13 C]sodium acetate could be used to indirectly gauge 1 H polarizations in standard sample formulations, which is potentially advantageous for (i) samples polarized in commercial dissolution dynamic nuclear polarization devices that lack 1 H radiofrequency hardware, (ii) measurements that are deleteriously influenced by radiation damping or complicated by the presence of large background signals and (iii) situations where the acquisition of a thermal equilibrium spectrum is not feasible.
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Affiliation(s)
- Stuart J. Elliott
- Centre de Résonance Magnétique Nucléaire à Très
Hauts Champs – FRE 2034 Université de Lyon/CNRS/Université
Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne,
France
- current address: Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
| | - Quentin Stern
- Centre de Résonance Magnétique Nucléaire à Très
Hauts Champs – FRE 2034 Université de Lyon/CNRS/Université
Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne,
France
| | - Sami Jannin
- Centre de Résonance Magnétique Nucléaire à Très
Hauts Champs – FRE 2034 Université de Lyon/CNRS/Université
Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne,
France
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24
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Abhyankar N, Szalai V. Challenges and Advances in the Application of Dynamic Nuclear Polarization to Liquid-State NMR Spectroscopy. J Phys Chem B 2021; 125:5171-5190. [PMID: 33960784 PMCID: PMC9871957 DOI: 10.1021/acs.jpcb.0c10937] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Nuclear magnetic resonance (NMR) spectroscopy is a powerful method to study the molecular structure and dynamics of materials. The inherently low sensitivity of NMR spectroscopy is a consequence of low spin polarization. Hyperpolarization of a spin ensemble is defined as a population difference between spin states that far exceeds what is expected from the Boltzmann distribution for a given temperature. Dynamic nuclear polarization (DNP) can overcome the relatively low sensitivity of NMR spectroscopy by using a paramagnetic matrix to hyperpolarize a nuclear spin ensemble. Application of DNP to NMR can result in sensitivity gains of up to four orders of magnitude compared to NMR without DNP. Although DNP NMR is now more routinely utilized for solid-state (ss) NMR spectroscopy, it has not been exploited to the same degree for liquid-state samples. This Review will consider challenges and advances in the application of DNP NMR to liquid-state samples. The Review is organized into four sections: (i) mechanisms of DNP NMR relevant to hyperpolarization of liquid samples; (ii) applications of liquid-state DNP NMR; (iii) available detection schemes for liquid-state samples; and (iv) instrumental challenges and outlook for liquid-state DNP NMR.
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Affiliation(s)
- Nandita Abhyankar
- Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD 20742, USA,National Institute of Standards and Technology, Gaithersburg, MD 20899, USA,Corresponding authors: ,
| | - Veronika Szalai
- National Institute of Standards and Technology, Gaithersburg, MD 20899, USA,Corresponding authors: ,
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25
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Elliott SJ, Cala O, Stern Q, Cousin SF, Eshchenko D, Melzi R, Kempf JG, Jannin S. Pulse sequence and sample formulation optimization for dipolar order mediated 1H→ 13C cross-polarization. Phys Chem Chem Phys 2021; 23:9457-9465. [PMID: 33885108 DOI: 10.1039/d1cp00429h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have recently demonstrated the use of contactless radiofrequency pulse sequences under dissolution-dynamic nuclear polarization conditions as an attractive way of transferring polarization from sensitive 1H spins to insensitive 13C spins with low peak radiofrequency pulse powers and energies via a reservoir of dipolar order. However, many factors remain to be investigated and optimized to enable the full potential of this polarization transfer process. We demonstrate herein the optimization of several key factors by: (i) implementing more efficient shaped radiofrequency pulses; (ii) adapting 13C spin labelling; and (iii) avoiding methyl group relaxation sinks. Experimental demonstrations are presented for the case of [1-13C]sodium acetate and other relevant molecular candidates. By employing the range of approaches set out above, polarization transfer using the dipolar order mediated cross-polarization radiofrequency pulse sequence is improved by factors approaching ∼1.65 compared with previous results. Dipolar order mediated 1H→13C polarization transfer efficiencies reaching ∼76% were achieved using significantly reduced peak radiofrequency pulse powers relative to the performance of highly sophisticated state-of-the-art cross-polarization methods, indicating 13C nuclear spin polarization levels on the order of ∼32.1% after 10 minutes of 1H DNP. The approach does not require extensive pulse sequence optimization procedures and can easily accommodate high concentrations of 13C-labelled molecules.
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Affiliation(s)
- Stuart J Elliott
- Centre de Résonance Magnétique Nucléaire à Très Hauts Champs - FRE 2034 Université de Lyon/CNRS/Université Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne, France.
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26
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Dey A, Charrier B, Martineau E, Deborde C, Gandriau E, Moing A, Jacob D, Eshchenko D, Schnell M, Melzi R, Kurzbach D, Ceillier M, Chappuis Q, Cousin SF, Kempf JG, Jannin S, Dumez JN, Giraudeau P. Hyperpolarized NMR Metabolomics at Natural 13C Abundance. Anal Chem 2020; 92:14867-14871. [PMID: 33136383 PMCID: PMC7705890 DOI: 10.1021/acs.analchem.0c03510] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 10/15/2020] [Indexed: 12/14/2022]
Abstract
Metabolomics plays a pivotal role in systems biology, and NMR is a central tool with high precision and exceptional resolution of chemical information. Most NMR metabolomic studies are based on 1H 1D spectroscopy, severely limited by peak overlap. 13C NMR benefits from a larger signal dispersion but is barely used in metabolomics due to ca. 6000-fold lower sensitivity. We introduce a new approach, based on hyperpolarized 13C NMR at natural abundance, that circumvents this limitation. A new untargeted NMR-based metabolomic workflow based on dissolution dynamic nuclear polarization (d-DNP) for the first time enabled hyperpolarized natural abundance 13C metabolomics. Statistical analysis of resulting hyperpolarized 13C data distinguishes two groups of plant (tomato) extracts and highlights biomarkers, in full agreement with previous results on the same biological model. We also optimize parameters of the semiautomated d-DNP system suitable for high-throughput studies.
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Affiliation(s)
- Arnab Dey
- Université
de Nantes, CNRS, CEISAM UMR
6230, F-44000 Nantes, France
| | - Benoît Charrier
- Université
de Nantes, CNRS, CEISAM UMR
6230, F-44000 Nantes, France
| | - Estelle Martineau
- Université
de Nantes, CNRS, CEISAM UMR
6230, F-44000 Nantes, France
- SpectroMaitrise,
CAPACITES SAS, F-44000 Nantes, France
| | - Catherine Deborde
- INRAE,
Univ. Bordeaux, UMR Biologie du Fruit et Pathologie, Centre INRAE de Nouvelle Aquitaine-Bordeaux, F-33140 Villenave
d’Ornon, France
- Bordeaux
Metabolome, MetaboHUB, Centre INRAE de Nouvelle
Aquitaine-Bordeaux, F-33140 Villenave d’Ornon, France
| | - Elodie Gandriau
- Université
de Nantes, CNRS, CEISAM UMR
6230, F-44000 Nantes, France
| | - Annick Moing
- INRAE,
Univ. Bordeaux, UMR Biologie du Fruit et Pathologie, Centre INRAE de Nouvelle Aquitaine-Bordeaux, F-33140 Villenave
d’Ornon, France
- Bordeaux
Metabolome, MetaboHUB, Centre INRAE de Nouvelle
Aquitaine-Bordeaux, F-33140 Villenave d’Ornon, France
| | - Daniel Jacob
- INRAE,
Univ. Bordeaux, UMR Biologie du Fruit et Pathologie, Centre INRAE de Nouvelle Aquitaine-Bordeaux, F-33140 Villenave
d’Ornon, France
- Bordeaux
Metabolome, MetaboHUB, Centre INRAE de Nouvelle
Aquitaine-Bordeaux, F-33140 Villenave d’Ornon, France
| | - Dmitry Eshchenko
- Bruker
Biospin, Industriestrasse
26, 8117 Fällanden, Switzerland
| | - Marc Schnell
- Bruker
Biospin, Industriestrasse
26, 8117 Fällanden, Switzerland
| | | | - Dennis Kurzbach
- University
of Vienna, Faculty of Chemistry, Institute of Biological Chemistry, Währinger Str. 38, 1090 Vienna, Austria
| | - Morgan Ceillier
- Université
de Lyon, CNRS, Université Claude
Bernard Lyon 1, ENS de Lyon, Centre de RMN à Très Hauts Champs (CRMN),
FRE 2034, F-69100 Villeurbanne, France
| | - Quentin Chappuis
- Université
de Lyon, CNRS, Université Claude
Bernard Lyon 1, ENS de Lyon, Centre de RMN à Très Hauts Champs (CRMN),
FRE 2034, F-69100 Villeurbanne, France
| | - Samuel F. Cousin
- Université
de Lyon, CNRS, Université Claude
Bernard Lyon 1, ENS de Lyon, Centre de RMN à Très Hauts Champs (CRMN),
FRE 2034, F-69100 Villeurbanne, France
| | - James G. Kempf
- Bruker
Biospin, 15 Fortune Dr., Billerica, Massachusetts 01821, United States
| | - Sami Jannin
- Université
de Lyon, CNRS, Université Claude
Bernard Lyon 1, ENS de Lyon, Centre de RMN à Très Hauts Champs (CRMN),
FRE 2034, F-69100 Villeurbanne, France
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27
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Hyperpolarization via dissolution dynamic nuclear polarization: new technological and methodological advances. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2020; 34:5-23. [PMID: 33185800 DOI: 10.1007/s10334-020-00894-w] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/04/2020] [Accepted: 10/23/2020] [Indexed: 12/20/2022]
Abstract
Dissolution-DNP is a method to boost liquid-state NMR sensitivity by several orders of magnitude. The technique consists in hyperpolarizing samples by solid-state dynamic nuclear polarization at low temperature and moderate magnetic field, followed by an instantaneous melting and dilution of the sample happening inside the polarizer. Although the technique is well established and the outstanding signal enhancement paved the way towards many applications precluded to conventional NMR, the race to develop new methods allowing higher throughput, faster and higher polarization, and longer exploitation of the signal is still vivid. In this work, we review the most recent advances on dissolution-DNP methods trying to overcome the original technique's shortcomings. The review describes some of the new approaches in the field, first, in terms of sample formulation and properties, and second, in terms of instrumentation.
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28
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Radaelli A, Yoshihara HAI, Nonaka H, Sando S, Ardenkjaer-Larsen JH, Gruetter R, Capozzi A. 13C Dynamic Nuclear Polarization using SA-BDPA at 6.7 T and 1.1 K: Coexistence of Pure Thermal Mixing and Well-Resolved Solid Effect. J Phys Chem Lett 2020; 11:6873-6879. [PMID: 32787205 DOI: 10.1021/acs.jpclett.0c01473] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
SA-BDPA is a water-soluble, narrow-line width radical previously used for dynamic nuclear polarization (DNP) signal enhancement in solid-state magic angle spinning NMR spectroscopy. Here, we report the first study using SA-BDPA under dissolution DNP conditions (6.7 T and 1.15 K). Longitudinal-detected (LOD)-electron spin resonance (ESR) and 13C DNP measurements were performed on samples containing 8.4 M [13C]urea dissolved in 50:50 water:glycerol (v/v) doped with either 60 or 120 mM SA-BDPA. Two distinct DNP mechanisms, both "pure" thermal mixing and a well-resolved solid effect could clearly be identified. The radical's ESR line width (30-40 MHz), broadened predominantly by dipolar coupling, excluded any contribution from the cross effect. Microwave frequency modulation increased the enhancement by DNP at the lower radical concentration but not at the higher radical concentration. These results are compared to data acquired with trityl radical AH111501, highlighting the unusual 13C DNP properties of SA-BDPA.
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Affiliation(s)
- Alice Radaelli
- Laboratory for Functional and Metabolic Imaging, EPFL, Lausanne, Switzerland 1015
| | - Hikari A I Yoshihara
- Laboratory for Functional and Metabolic Imaging, EPFL, Lausanne, Switzerland 1015
| | - Hiroshi Nonaka
- Department of Chemistry and Biotechnology, The University of Tokyo, Tokyo, Japan 113-8656
| | - Shinsuke Sando
- Department of Chemistry and Biotechnology, The University of Tokyo, Tokyo, Japan 113-8656
| | | | - Rolf Gruetter
- Laboratory for Functional and Metabolic Imaging, EPFL, Lausanne, Switzerland 1015
| | - Andrea Capozzi
- Laboratory for Functional and Metabolic Imaging, EPFL, Lausanne, Switzerland 1015
- Department of Health Technology, Technical University of Denmark, Kgs. Lyngby, Denmark 2800
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29
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Elliott S, Cousin S, Chappuis Q, Cala O, Ceillier M, Bornet A, Jannin S. Dipolar order mediated 1H → 13C cross-polarization for dissolution-dynamic nuclear polarization. MAGNETIC RESONANCE 2020; 1:89-96. [PMCID: PMC10500725 DOI: 10.5194/mr-1-89-2020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 04/16/2020] [Indexed: 11/01/2023]
Abstract
Magnetic resonance imaging and spectroscopy often suffer from a low intrinsic sensitivity, which can in some cases be circumvented by the use of hyperpolarization techniques. Dissolution-dynamic nuclear polarization offers a way of hyperpolarizing 13 C spins in small molecules, enhancing their sensitivity by up to 4 orders of magnitude. This is usually performed by direct 13 C polarization, which is straightforward but often takes more than an hour. Alternatively, indirect 1 H polarization followed by 1 H → 13 C polarization transfer can be implemented, which is more efficient and faster but is technically very challenging and hardly implemented in practice. Here we propose to remove the main roadblocks of the 1 H → 13 C polarization transfer process by using alternative schemes with the following: (i) less rf (radiofrequency) power; (ii) less overall rf energy; (iii) simple rf-pulse shapes; and (iv) no synchronized 1 H and 13 C rf irradiation. An experimental demonstration of such a simple 1 H → 13 C polarization transfer technique is presented for the case of [1-13 C ]sodium acetate, and is compared with the most sophisticated cross-polarization schemes. A polarization transfer efficiency of ∼ 0.43 with respect to cross-polarization was realized, which resulted in a 13 C polarization of ∼ 8.7 % after ∼ 10 min of microwave irradiation and a single polarization transfer step.
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Affiliation(s)
- Stuart J. Elliott
- Centre de Résonance Magnétique Nucléaire à Très
Hauts Champs – FRE 2034 Université de Lyon/CNRS/Université
Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne,
France
| | - Samuel F. Cousin
- Centre de Résonance Magnétique Nucléaire à Très
Hauts Champs – FRE 2034 Université de Lyon/CNRS/Université
Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne,
France
| | - Quentin Chappuis
- Centre de Résonance Magnétique Nucléaire à Très
Hauts Champs – FRE 2034 Université de Lyon/CNRS/Université
Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne,
France
| | - Olivier Cala
- Centre de Résonance Magnétique Nucléaire à Très
Hauts Champs – FRE 2034 Université de Lyon/CNRS/Université
Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne,
France
| | - Morgan Ceillier
- Centre de Résonance Magnétique Nucléaire à Très
Hauts Champs – FRE 2034 Université de Lyon/CNRS/Université
Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne,
France
| | - Aurélien Bornet
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique
Fédérale de Lausanne (EPFL), Batochime, 1015 Lausanne, Switzerland
| | - Sami Jannin
- Centre de Résonance Magnétique Nucléaire à Très
Hauts Champs – FRE 2034 Université de Lyon/CNRS/Université
Claude Bernard Lyon 1/ENS de Lyon, 5 Rue de la Doua, 69100 Villeurbanne,
France
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30
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Judge PT, Sesti EL, Alaniva N, Saliba EP, Price LE, Gao C, Halbritter T, Sigurdsson ST, Kyei GB, Barnes AB. Characterization of frequency-chirped dynamic nuclear polarization in rotating solids. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2020; 313:106702. [PMID: 32203923 DOI: 10.1016/j.jmr.2020.106702] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 01/18/2020] [Accepted: 02/21/2020] [Indexed: 06/10/2023]
Abstract
Continuous wave (CW) dynamic nuclear polarization (DNP) is used with magic angle spinning (MAS) to enhance the typically poor sensitivity of nuclear magnetic resonance (NMR) by orders of magnitude. In a recent publication we show that further enhancement is obtained by using a frequency-agile gyrotron to chirp incident microwave frequency through the electron resonance frequency during DNP transfer. Here we characterize the effect of chirped MAS DNP by investigating the sweep time, sweep width, center-frequency, and electron Rabi frequency of the chirps. We show the advantages of chirped DNP with a trityl-nitroxide biradical, and a lack of improvement with chirped DNP using AMUPol, a nitroxide biradical. Frequency-chirped DNP on a model system of urea in a cryoprotecting matrix yields an enhancement of 142, 21% greater than that obtained with CW DNP. We then go beyond this model system and apply chirped DNP to intact human cells. In human Jurkat cells, frequency-chirped DNP improves enhancement by 24% over CW DNP. The characterization of the chirped DNP effect reveals instrument limitations on sweep time and sweep width, promising even greater increases in sensitivity with further technology development. These improvements in gyrotron technology, frequency-agile methods, and in-cell applications are expected to play a significant role in the advancement of MAS DNP.
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Affiliation(s)
- Patrick T Judge
- Department of Chemistry, Washington University in St. Louis, St. Louis, MO 63130, United States; Department of Biochemistry, Biophysics & Structural Biology, Washington University in St. Louis, St. Louis, MO 63110, United States
| | - Erika L Sesti
- Department of Chemistry, Washington University in St. Louis, St. Louis, MO 63130, United States
| | - Nicholas Alaniva
- Department of Chemistry, Washington University in St. Louis, St. Louis, MO 63130, United States
| | - Edward P Saliba
- Department of Chemistry, Washington University in St. Louis, St. Louis, MO 63130, United States
| | - Lauren E Price
- Department of Chemistry, Washington University in St. Louis, St. Louis, MO 63130, United States
| | - Chukun Gao
- Department of Chemistry, Washington University in St. Louis, St. Louis, MO 63130, United States
| | - Thomas Halbritter
- Department of Chemistry, University of Iceland, Science Institute, Dunhaga 3, 107 Reykjavik, Iceland
| | - Snorri Th Sigurdsson
- Department of Chemistry, University of Iceland, Science Institute, Dunhaga 3, 107 Reykjavik, Iceland
| | - George B Kyei
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63130, United States; Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, Legon, Accra, Ghana
| | - Alexander B Barnes
- Physical Chemistry, ETH Zurich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland; Department of Chemistry, Washington University in St. Louis, St. Louis, MO 63130, United States.
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31
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Abstract
Dynamic nuclear polarization (DNP) is one of the most prominent methods of sensitivity enhancement in nuclear magnetic resonance (NMR). Even though solid-state DNP under magic-angle spinning (MAS) has left the proof-of-concept phase and has become an important tool for structural investigations of biomolecules as well as materials, it is still far from mainstream applicability because of the potentially overwhelming combination of unique instrumentation, complex sample preparation, and a multitude of different mechanisms and methods available. In this review, I introduce the diverse field and history of DNP, combining aspects of NMR and electron paramagnetic resonance. I then explain the general concepts and detailed mechanisms relevant at high magnetic field, including solution-state methods based on Overhauser DNP but with a greater focus on the more established MAS DNP methods. Finally, I review practical considerations and fields of application and discuss future developments.
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Affiliation(s)
- Björn Corzilius
- Institute of Chemistry and Department of Life, Light and Matter, University of Rostock, 18059 Rostock, Germany;
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32
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Equbal A, Tagami K, Han S. Pulse-Shaped Dynamic Nuclear Polarization under Magic-Angle Spinning. J Phys Chem Lett 2019; 10:7781-7788. [PMID: 31790265 DOI: 10.1021/acs.jpclett.9b03070] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Dynamic nuclear polarization (DNP) under magic-angle spinning (MAS) is transforming the scope of solid-state NMR by enormous signal amplification through transfer of polarization from electron spins to nuclear spins. Contemporary MAS-DNP exclusively relies on monochromatic continuous-wave (CW) irradiation of the electron spin resonance. This limits control on electron spin dynamics, which renders the DNP process inefficient, especially at higher magnetic fields and non cryogenic temperatures. Pulse-shaped microwave irradiation of the electron spins is predicted to overcome these challenges but hitherto has never been implemented under MAS. Here, we debut pulse-shaped microwave irradiation using arbitrary-waveform generation (AWG) which allows controlled recruitment of a greater number of electron spins per unit time, favorable for MAS-DNP. Experiments and quantum mechanical simulations demonstrate that pulse-shaped DNP is superior to CW-DNP for mixed radical system, especially when the electron spin resonance is heterogeneously broadened and/or when its spin-lattice relaxation is fast compared to the MAS rotor period, opening new prospects for MAS-DNP.
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Affiliation(s)
- Asif Equbal
- Department of Chemistry and Biochemistry , University of California , Santa Barbara , California 93106 , United States
| | - Kan Tagami
- Department of Chemistry and Biochemistry , University of California , Santa Barbara , California 93106 , United States
| | - Songi Han
- Department of Chemistry and Biochemistry , University of California , Santa Barbara , California 93106 , United States
- Department of Chemical Engineering , University of California , Santa Barbara , California 93106 , United States
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33
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Aghelnejad B, Bodenhausen G, Marhabaie S. A Low-Temperature Broadband NMR Probe for Multinuclear Cross-Polarization. Chemphyschem 2019; 20:2830-2835. [PMID: 31502395 DOI: 10.1002/cphc.201900723] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Indexed: 11/08/2022]
Abstract
Dissolution dynamic nuclear polarization (D-DNP) probes are usually designed for one or at most two specific nuclei. Investigation of multiple nuclei usually requires manufacturing a number of costly probes. In addition, changing the probe is a time-consuming process since a system that works at low temperature (usually between 1.2 and 4.2 K) must be warmed up, thus increasing the risks of contamination. Here, an efficient apparatus is described for D-DNP designed not only for microwave-enhanced direct observation of a wide range of nuclei S such as 1 H, 13 C, 2 H, 23 Na, and 17 O, but also for cross-polarization (CP) from I=1 H to such S nuclei. Unlike most conventional designs, the tuning and matching circuits are partly immersed in superfluid helium at temperatures down to 1.2 K. Intense radio-frequency (RF) fields with amplitudes on the order of 50 kHz or better can be applied simultaneously to both nuclei I and S using RF amplifiers with powers on the order of 90 and 80 W, respectively, without significant losses of liquid helium. The system can operate at temperatures over a wide range between 1.2 and 300 K.
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Affiliation(s)
- Behdad Aghelnejad
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France.,Bruker Biospin SAS, F-67160, Wissembourg, France
| | - Geoffrey Bodenhausen
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France
| | - Sina Marhabaie
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005, Paris, France.,Current address: IFSTTAR, Université Paris-Est UPEMLV, Marne-la-Vallée, France
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Jannin S, Dumez JN, Giraudeau P, Kurzbach D. Application and methodology of dissolution dynamic nuclear polarization in physical, chemical and biological contexts. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2019; 305:41-50. [PMID: 31203098 PMCID: PMC6616036 DOI: 10.1016/j.jmr.2019.06.001] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 05/28/2019] [Accepted: 06/02/2019] [Indexed: 05/06/2023]
Abstract
Dissolution dynamic nuclear polarization (d-DNP) is a versatile method to enhance nuclear magnetic resonance (NMR) spectroscopy. It boosts signal intensities by four to five orders of magnitude thereby providing the potential to improve and enable a plethora of applications ranging from the real-time monitoring of chemical or biological processes to metabolomics and in-cell investigations. This perspectives article highlights possible avenues for developments and applications of d-DNP in biochemical and physicochemical studies. It outlines how chemists, biologists and physicists with various fields of interest can transform and employ d-DNP as a powerful characterization method for their research.
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Affiliation(s)
- Sami Jannin
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Centre de RMN à Très Hauts Champs (CRMN), FRE 2034, 69100 Villeurbanne, France
| | | | - Patrick Giraudeau
- Université de Nantes, CNRS, CEISAM (UMR 6230), 44000 Nantes, France; Institut Universitaire de France, 1 rue Descartes, 75005 Paris, France
| | - Dennis Kurzbach
- University of Vienna, Faculty of Chemistry, Institute of Biological Chemistry, Währinger Str. 38, 1090 Vienna, Austria.
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35
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Jähnig F, Himmler A, Kwiatkowski G, Däpp A, Hunkeler A, Kozerke S, Ernst M. A spin-thermodynamic approach to characterize spin dynamics in TEMPO-based samples for dissolution DNP at 7 T field. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2019; 303:91-104. [PMID: 31030064 DOI: 10.1016/j.jmr.2019.04.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 04/12/2019] [Accepted: 04/19/2019] [Indexed: 06/09/2023]
Abstract
The spin dynamics of dissolution DNP samples consisting of 4.5 M [13C]urea in a mixture of (1/1)Vol glycerol/water using 4-Oxo-TEMPO as a radical was investigated. We analyzed the DNP dynamics as function of radical concentration at 7 T and 3.4 T static magnetic field as well as function of deuteration of the solvent matrix at the high field. The spin dynamics could be reproduced in all cases, at least qualitatively, by a thermodynamic model based on spin temperatures of the nuclear Zeeman baths and an electron non-Zeeman (dipolar) bath. We find, however, that at high field (7 T) and low radical concentrations (25 mM) the nuclear spins do not reach the same spin temperature indicating a weak coupling of the two baths. At higher radical concentrations, as well as for all radical concentrations at low field (3.4 T), the two nuclear Zeeman baths reach the same spin temperature within experimental errors. Additionally, the spin system was prepared with different initial conditions. For these cases, the thermodynamic model was able to predict the time evolution of the system well. While the DNP profiles do not give clear indications to a specific polarization transfer mechanism, at high field (7 T) increased coupling is seen. The EPR line shapes cannot clarify this in absence of ELDOR type experiments, nevertheless DNP profiles and dynamics under frequency-modulated microwave irradiation illustrate the expected increase in coupling between electrons with increasing radical concentration.
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Affiliation(s)
- Fabian Jähnig
- Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Aaron Himmler
- Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Grzegorz Kwiatkowski
- Institute for Biomedical Engineering, University and ETH Zürich, Gloriastrasse 35, 8092 Zürich, Switzerland
| | - Alexander Däpp
- Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Andreas Hunkeler
- Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Sebastian Kozerke
- Institute for Biomedical Engineering, University and ETH Zürich, Gloriastrasse 35, 8092 Zürich, Switzerland
| | - Matthias Ernst
- Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland.
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Kouřil K, Kouřilová H, Bartram S, Levitt MH, Meier B. Scalable dissolution-dynamic nuclear polarization with rapid transfer of a polarized solid. Nat Commun 2019; 10:1733. [PMID: 30988293 PMCID: PMC6465283 DOI: 10.1038/s41467-019-09726-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 03/27/2019] [Indexed: 12/02/2022] Open
Abstract
In dissolution-dynamic nuclear polarization, nuclear spins are hyperpolarized at cryogenic temperatures using radicals and microwave irradiation. The hyperpolarized solid is dissolved with hot solvent and the solution is transferred to a secondary magnet where strongly enhanced magnetic resonance signals are observed. Here we present a method for transferring the hyperpolarized solid. A bullet containing the frozen, hyperpolarized sample is ejected using pressurized helium gas, and shot into a receiving structure in the secondary magnet, where the bullet is retained and the polarized solid is dissolved rapidly. The transfer takes approximately 70 ms. A solenoid, wound along the entire transfer path ensures adiabatic transfer and limits radical-induced low-field relaxation. The method is fast and scalable towards small volumes suitable for high-resolution nuclear magnetic resonance spectroscopy while maintaining high concentrations of the target molecule. Polarization levels of approximately 30% have been observed for 1-13C-labelled pyruvic acid in solution.
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Affiliation(s)
- Karel Kouřil
- School of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom.
| | - Hana Kouřilová
- School of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom
| | - Samuel Bartram
- School of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom
| | - Malcolm H Levitt
- School of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom
| | - Benno Meier
- School of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom.
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37
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Capozzi A, Patel S, Gunnarsson CP, Marco-Rius I, Comment A, Karlsson M, Lerche MH, Ouari O, Ardenkjær-Larsen JH. Efficient Hyperpolarization of U- 13 C-Glucose Using Narrow-Line UV-Generated Labile Free Radicals. Angew Chem Int Ed Engl 2019; 58:1334-1339. [PMID: 30515929 PMCID: PMC6531289 DOI: 10.1002/anie.201810522] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 11/21/2018] [Indexed: 11/06/2022]
Abstract
Free radicals generated by UV-light irradiation of a frozen solution containing a fraction of pyruvic acid (PA) have demonstrated their dissolution dynamic nuclear polarization (dDNP) potential, providing up to 30 % [1-13 C]PA liquid-state polarization. Moreover, their labile nature has proven to pave a way to nuclear polarization storage and transport. Herein, differently from the case of PA, the issue of providing dDNP UV-radical precursors (trimethylpyruvic acid and its methyl-deuterated form) not involved in any metabolic pathway was investigated. The 13 C dDNP performance was evaluated for hyperpolarization of [U-13 C6 ,1,2,3,4,5,6,6-d7 ]-d-glucose. The generated UV-radicals proved to be versatile and highly efficient polarizing agents, providing, after dissolution and transfer (10 s), a 13 C liquid-state polarization of up to 32 %.
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Affiliation(s)
- Andrea Capozzi
- Center for Hyperpolarization in Magnetic Resonance, Department of Electrical Engineering, Technical University of Denmark, Building 349, 2800 Kgs Lyngby (Denmark)
| | - Saket Patel
- Institut de Chimie Radicalire, Aix-Marseille Université, CNRS, ICR UMR 7273, 13397 Marseille Cedex 20 (France)
| | - Christine Pepke Gunnarsson
- Center for Hyperpolarization in Magnetic Resonance, Department of Electrical Engineering, Technical University of Denmark, Building 349, 2800 Kgs Lyngby (Denmark)
| | - Irene Marco-Rius
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge (United Kingdom)
| | - Arnaud Comment
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge (United Kingdom)
- General Electric Healthcare, Chalfont St Giles, Buckinghamshire HP8 4SP (United Kingdom)
| | - Magnus Karlsson
- Center for Hyperpolarization in Magnetic Resonance, Department of Electrical Engineering, Technical University of Denmark, Building 349, 2800 Kgs Lyngby (Denmark)
| | - Mathilde H. Lerche
- Center for Hyperpolarization in Magnetic Resonance, Department of Electrical Engineering, Technical University of Denmark, Building 349, 2800 Kgs Lyngby (Denmark)
| | - Olivier Ouari
- Institut de Chimie Radicalire, Aix-Marseille Université, CNRS, ICR UMR 7273, 13397 Marseille Cedex 20 (France)
| | - Jan Henrik Ardenkjær-Larsen
- Center for Hyperpolarization in Magnetic Resonance, Department of Electrical Engineering, Technical University of Denmark, Building 349, 2800 Kgs Lyngby (Denmark)
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38
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Capozzi A, Patel S, Gunnarsson CP, Marco-Rius I, Comment A, Karlsson M, Lerche MH, Ouari O, Ardenkjaer-Larsen JH. Efficient Hyperpolarization of U-13
C-Glucose Using Narrow-Line UV-Generated Labile Free Radicals. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810522] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Andrea Capozzi
- Center for Hyperpolarization in Magnetic Resonance; Department of Electrical Engineering; Technical University of Denmark; Building 349 2800 Kgs Lyngby Denmark
| | - Saket Patel
- Institut de Chimie Radicalaire; Aix-Marseille Université; CNRS, ICR UMR 7273; 13397 Marseille Cedex 20 France
| | - Christine Pepke Gunnarsson
- Center for Hyperpolarization in Magnetic Resonance; Department of Electrical Engineering; Technical University of Denmark; Building 349 2800 Kgs Lyngby Denmark
| | - Irene Marco-Rius
- Cancer Research (UK) Cambridge Institute; University of Cambridge; Li Ka Shing Centre Cambridge United Kingdom
| | - Arnaud Comment
- Cancer Research (UK) Cambridge Institute; University of Cambridge; Li Ka Shing Centre Cambridge United Kingdom
- General Electric Healthcare; Chalfont St Giles Buckinghamshire HP8 4SP UK
| | - Magnus Karlsson
- Center for Hyperpolarization in Magnetic Resonance; Department of Electrical Engineering; Technical University of Denmark; Building 349 2800 Kgs Lyngby Denmark
| | - Mathilde H. Lerche
- Center for Hyperpolarization in Magnetic Resonance; Department of Electrical Engineering; Technical University of Denmark; Building 349 2800 Kgs Lyngby Denmark
| | - Olivier Ouari
- Institut de Chimie Radicalaire; Aix-Marseille Université; CNRS, ICR UMR 7273; 13397 Marseille Cedex 20 France
| | - Jan Henrik Ardenkjaer-Larsen
- Center for Hyperpolarization in Magnetic Resonance; Department of Electrical Engineering; Technical University of Denmark; Building 349 2800 Kgs Lyngby Denmark
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Leroy C, Bryce DL. Recent advances in solid-state nuclear magnetic resonance spectroscopy of exotic nuclei. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2018; 109:160-199. [PMID: 30527135 DOI: 10.1016/j.pnmrs.2018.08.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 07/18/2018] [Accepted: 08/10/2018] [Indexed: 06/09/2023]
Abstract
We present a review of recent advances in solid-state nuclear magnetic resonance (SSNMR) studies of exotic nuclei. Exotic nuclei may be spin-1/2 or quadrupolar, and typically have low gyromagnetic ratios, low natural abundances, large quadrupole moments (when I > 1/2), or some combination of these properties, generally resulting in low receptivities and/or prohibitively broad line widths. Some nuclides are little studied for other reasons, also rendering them somewhat exotic. We first discuss some of the recent progress in pulse sequences and hardware development which continues to enable researchers to study new kinds of materials as well as previously unfeasible nuclei. This is followed by a survey of applications to a wide range of exotic nuclei (including e.g., 9Be, 25Mg, 33S, 39K, 43Ca, 47/49Ti, 53Cr, 59Co, 61Ni, 67Zn, 73Ge, 75As, 87Sr, 115In, 119Sn, 121/123Sb, 135/137Ba, 185/187Re, 209Bi), most of them quadrupolar. The scope of the review is the past ten years, i.e., 2007-2017.
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Affiliation(s)
- César Leroy
- Department of Chemistry and Biomolecular Sciences & Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie Private, Ottawa, Ontario K1N 6N5, Canada
| | - David L Bryce
- Department of Chemistry and Biomolecular Sciences & Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie Private, Ottawa, Ontario K1N 6N5, Canada.
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40
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Niedbalski P, Kiswandhi A, Parish C, Wang Q, Khashami F, Lumata L. NMR Spectroscopy Unchained: Attaining the Highest Signal Enhancements in Dissolution Dynamic Nuclear Polarization. J Phys Chem Lett 2018; 9:5481-5489. [PMID: 30179503 DOI: 10.1021/acs.jpclett.8b01687] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Dynamic nuclear polarization (DNP) via the dissolution method is one of the most successful methods for alleviating the inherently low Boltzmann-dictated sensitivity in nuclear magnetic resonance (NMR) spectroscopy. This emerging technology has already begun to positively impact chemical and metabolic research by providing the much-needed enhancement of the liquid-state NMR signals of insensitive nuclei such as 13C by several thousand-fold. In this Perspective, we present our viewpoints regarding the key elements needed to maximize the NMR signal enhancements in dissolution DNP, from the very core of the DNP process at cryogenic temperatures, DNP instrumental conditions, and chemical tuning in sample preparation to current developments in minimizing hyperpolarization losses during the dissolution transfer process. The optimization steps discussed herein could potentially provide important experimental and theoretical considerations in harnessing the best possible sensitivity gains in NMR spectroscopy as afforded by optimized dissolution DNP technology.
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Affiliation(s)
- Peter Niedbalski
- Department of Physics , The University of Texas at Dallas , 800 West Campbell Road , Richardson , Texas 75080 , United States
| | - Andhika Kiswandhi
- Department of Physics , The University of Texas at Dallas , 800 West Campbell Road , Richardson , Texas 75080 , United States
| | - Christopher Parish
- Department of Physics , The University of Texas at Dallas , 800 West Campbell Road , Richardson , Texas 75080 , United States
| | - Qing Wang
- Department of Physics , The University of Texas at Dallas , 800 West Campbell Road , Richardson , Texas 75080 , United States
| | - Fatemeh Khashami
- Department of Physics , The University of Texas at Dallas , 800 West Campbell Road , Richardson , Texas 75080 , United States
| | - Lloyd Lumata
- Department of Physics , The University of Texas at Dallas , 800 West Campbell Road , Richardson , Texas 75080 , United States
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41
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Baudin M, Vuichoud B, Bornet A, Bodenhausen G, Jannin S. A cryogen-consumption-free system for dynamic nuclear polarization at 9.4 T. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2018; 294:115-121. [PMID: 30032035 DOI: 10.1016/j.jmr.2018.07.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/20/2018] [Accepted: 07/01/2018] [Indexed: 05/15/2023]
Abstract
A novel system for dissolution dynamic nuclear polarization based on a cost-effective "cryogen-free" magnet that can generate fields up to 9.4 T with a sample space that can reach temperatures below 1.4 K in a continuous and stable manner. Polarization levels up to P(1H) = 60 ± 5% can be reached with TEMPOL in about 20 min, and P(13C) = 50 ± 5% can be achieved using adiabatic cross polarization.
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Affiliation(s)
- Mathieu Baudin
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France.
| | - Basile Vuichoud
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 69100 Villeurbanne, France
| | - Aurélien Bornet
- Institut des sciences et ingénierie chimiques (ISIC), Ecole PolytechniqueFédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Geoffrey Bodenhausen
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Sami Jannin
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 69100 Villeurbanne, France
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42
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Kaminker I, Han S. Amplification of Dynamic Nuclear Polarization at 200 GHz by Arbitrary Pulse Shaping of the Electron Spin Saturation Profile. J Phys Chem Lett 2018; 9:3110-3115. [PMID: 29775537 DOI: 10.1021/acs.jpclett.8b01413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Dynamic nuclear polarization (DNP) takes center stage in nuclear magnetic resonance (NMR) as a tool to amplify its signal by orders of magnitude through the transfer of polarization from electron to nuclear spins. In contrast to modern NMR and electron paramagnetic resonance (EPR) that extensively rely on pulses for spin manipulation in the time domain, the current mainstream DNP technology exclusively relies on monochromatic continuous wave (CW) irradiation. This study introduces arbitrary phase shaped pulses that constitute a train of coherent chirp pulses in the time domain at 200 GHz (7 T) to dramatically enhance the saturation bandwidth and DNP performance compared to CW DNP, yielding up to 500-fold in NMR signal enhancements. The observed improvement is attributed to the recruitment of additional electron spins contributing to DNP via the cross-effect mechanism, as experimentally confirmed by two-frequency pump-probe electron-electron double resonance (ELDOR).
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43
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Kovtunov KV, Pokochueva EV, Salnikov OG, Cousin S, Kurzbach D, Vuichoud B, Jannin S, Chekmenev EY, Goodson BM, Barskiy DA, Koptyug IV. Hyperpolarized NMR Spectroscopy: d-DNP, PHIP, and SABRE Techniques. Chem Asian J 2018; 13:10.1002/asia.201800551. [PMID: 29790649 PMCID: PMC6251772 DOI: 10.1002/asia.201800551] [Citation(s) in RCA: 156] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Indexed: 11/10/2022]
Abstract
The intensity of NMR signals can be enhanced by several orders of magnitude by using various techniques for the hyperpolarization of different molecules. Such approaches can overcome the main sensitivity challenges facing modern NMR/magnetic resonance imaging (MRI) techniques, whilst hyperpolarized fluids can also be used in a variety of applications in material science and biomedicine. This Focus Review considers the fundamentals of the preparation of hyperpolarized liquids and gases by using dissolution dynamic nuclear polarization (d-DNP) and parahydrogen-based techniques, such as signal amplification by reversible exchange (SABRE) and parahydrogen-induced polarization (PHIP), in both heterogeneous and homogeneous processes. The various new aspects in the formation and utilization of hyperpolarized fluids, along with the possibility of observing NMR signal enhancement, are described.
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Affiliation(s)
- Kirill V. Kovtunov
- Laboratory of Magnetic Resonance Microimaging, International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090 (Russia)
- Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090 (Russia)
| | - Ekaterina V. Pokochueva
- Laboratory of Magnetic Resonance Microimaging, International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090 (Russia)
- Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090 (Russia)
| | - Oleg G. Salnikov
- Laboratory of Magnetic Resonance Microimaging, International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090 (Russia)
- Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090 (Russia)
| | - Samuel Cousin
- Univ Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Dennis Kurzbach
- Laboratoire des biomolécules, LBM, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Basile Vuichoud
- Univ Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Sami Jannin
- Univ Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Eduard Y. Chekmenev
- Department of Chemistry & Karmanos Cancer Center, Wayne State University, Detroit, 48202, MI, United States
- Russian Academy of Sciences, Moscow, 119991, Russia
| | - Boyd M. Goodson
- Southern Illinois University, Carbondale, IL 62901, United States
| | - Danila A. Barskiy
- Department of Chemistry, University of California at Berkeley, Berkeley, California 94720-3220, United States
| | - Igor V. Koptyug
- Laboratory of Magnetic Resonance Microimaging, International Tomography Center, SB RAS, 3A Institutskaya St., Novosibirsk 630090 (Russia)
- Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090 (Russia)
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44
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Scott FJ, Saliba EP, Albert BJ, Alaniva N, Sesti EL, Gao C, Golota NC, Choi EJ, Jagtap AP, Wittmann JJ, Eckardt M, Harneit W, Corzilius B, Th Sigurdsson S, Barnes AB. Frequency-agile gyrotron for electron decoupling and pulsed dynamic nuclear polarization. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2018; 289:45-54. [PMID: 29471275 DOI: 10.1016/j.jmr.2018.02.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 02/09/2018] [Accepted: 02/11/2018] [Indexed: 05/05/2023]
Abstract
We describe a frequency-agile gyrotron which can generate frequency-chirped microwave pulses. An arbitrary waveform generator (AWG) within the NMR spectrometer controls the microwave frequency, enabling synchronized pulsed control of both electron and nuclear spins. We demonstrate that the acceleration of emitted electrons, and thus the microwave frequency, can be quickly changed by varying the anode voltage. This strategy results in much faster frequency response than can be achieved by changing the potential of the electron emitter, and does not require a custom triode electron gun. The gyrotron frequency can be swept with a rate of 20 MHz/μs over a 670 MHz bandwidth in a static magnetic field. We have already implemented time-domain electron decoupling with dynamic nuclear polarization (DNP) magic angle spinning (MAS) with this device. In this contribution, we show frequency-swept DNP enhancement profiles recorded without changing the NMR magnet or probe. The profile of endofullerenes exhibits a DNP profile with a <10 MHz linewidth, indicating that the device also has sufficient frequency stability, and therefore phase stability, to implement pulsed DNP mechanisms such as the frequency-swept solid effect. We describe schematics of the mechanical and vacuum construction of the device which includes a novel flanged sapphire window assembly. Finally, we discuss how commercially available continuous-wave gyrotrons can potentially be converted into similar frequency-agile high-power microwave sources.
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Affiliation(s)
- Faith J Scott
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, MO 63130, USA
| | - Edward P Saliba
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, MO 63130, USA
| | - Brice J Albert
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, MO 63130, USA
| | - Nicholas Alaniva
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, MO 63130, USA
| | - Erika L Sesti
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, MO 63130, USA
| | - Chukun Gao
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, MO 63130, USA
| | - Natalie C Golota
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, MO 63130, USA
| | - Eric J Choi
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, MO 63130, USA
| | - Anil P Jagtap
- Department of Chemistry, Science Institute, University of Iceland, Dunhaga 3, 107 Reykjavik, Iceland
| | - Johannes J Wittmann
- Institute for Physical and Theoretical Chemistry, Institute of Biophysical Chemistry, and Center for Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt, Max-von-Laue-Str. 7-9, 60438 Frankfurt am Main, Germany
| | - Michael Eckardt
- Institut für Physikalische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, 55099 Mainz, Germany; Fachbereich Physik, Universität Osnabrück, Barbarastr. 7, 49076 Osnabrück, Germany
| | - Wolfgang Harneit
- Institut für Physikalische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, 55099 Mainz, Germany; Fachbereich Physik, Universität Osnabrück, Barbarastr. 7, 49076 Osnabrück, Germany
| | - Björn Corzilius
- Institute for Physical and Theoretical Chemistry, Institute of Biophysical Chemistry, and Center for Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt, Max-von-Laue-Str. 7-9, 60438 Frankfurt am Main, Germany
| | - Snorri Th Sigurdsson
- Department of Chemistry, Science Institute, University of Iceland, Dunhaga 3, 107 Reykjavik, Iceland
| | - Alexander B Barnes
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, MO 63130, USA.
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45
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Cavaillès M, Bornet A, Jaurand X, Vuichoud B, Baudouin D, Baudin M, Veyre L, Bodenhausen G, Dumez JN, Jannin S, Copéret C, Thieuleux C. Tailored Microstructured Hyperpolarizing Matrices for Optimal Magnetic Resonance Imaging. Angew Chem Int Ed Engl 2018; 57:7453-7457. [PMID: 29457685 DOI: 10.1002/anie.201801009] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Indexed: 11/06/2022]
Abstract
Tailoring the physical features and the porous network architecture of silica-based hyperpolarizing solids containing TEMPO radicals, known as HYPSO (hybrid polarizing solids), enabled unprecedented performance of dissolution dynamic nuclear polarization (d-DNP). High polarization values up to P(1 H)=99 % were reached for samples impregnated with a mixture of H2 O/D2 O and loaded in a 6.7 T polarizer at temperatures around 1.2 K. These HYPSO materials combine the best performance of homogeneous DNP formulations with the advantages of solid polarizing matrices, which provide hyperpolarized solutions free of any-potentially toxic-additives (radicals and glass-forming agents). The hyperpolarized solutions can be expelled from the porous solids, filtered, and rapidly transferred either to a nuclear magnetic resonance (NMR) spectrometer or to a magnetic resonance imaging (MRI) system.
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Affiliation(s)
- Matthieu Cavaillès
- Institut de Chimie de Lyon, Laboratory C2P2 UMR 5265-CNRS, Université de Lyon 1-CPE Lyon, CPE Lyon, 43 Bd du 11 Novembre 1918, 69616, Villeurbanne, France
| | - Aurélien Bornet
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | - Xavier Jaurand
- Université de Lyon, Université Claude Bernard Lyon 1, Centre Technologique des Microstructures (CTμ), 5 rue Raphael Dubois, 69622, Villeurbanne Cedex, France
| | - Basile Vuichoud
- Univ. Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, 69100, Villeurbanne, France
| | - David Baudouin
- Institut de Chimie de Lyon, Laboratory C2P2 UMR 5265-CNRS, Université de Lyon 1-CPE Lyon, CPE Lyon, 43 Bd du 11 Novembre 1918, 69616, Villeurbanne, France
| | - Mathieu Baudin
- Département de Chimie, Ecole Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolécules (LBM), 24 rue de Lhomond, 75005, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM), Paris, France
| | - Laurent Veyre
- Institut de Chimie de Lyon, Laboratory C2P2 UMR 5265-CNRS, Université de Lyon 1-CPE Lyon, CPE Lyon, 43 Bd du 11 Novembre 1918, 69616, Villeurbanne, France
| | - Geoffrey Bodenhausen
- Département de Chimie, Ecole Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolécules (LBM), 24 rue de Lhomond, 75005, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM), Paris, France
| | - Jean-Nicolas Dumez
- Institut de Chimie des Substances Naturelles, CNRS UPR2301, Univ. Paris Sud, Université Paris-Saclay, 91190, Gif-sur-Yvette, France
| | - Sami Jannin
- Univ. Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, 69100, Villeurbanne, France
| | - Christophe Copéret
- Dept. of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093, Zürich, Switzerland
| | - Chloé Thieuleux
- Institut de Chimie de Lyon, Laboratory C2P2 UMR 5265-CNRS, Université de Lyon 1-CPE Lyon, CPE Lyon, 43 Bd du 11 Novembre 1918, 69616, Villeurbanne, France
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Cavaillès M, Bornet A, Jaurand X, Vuichoud B, Baudouin D, Baudin M, Veyre L, Bodenhausen G, Dumez JN, Jannin S, Copéret C, Thieuleux C. Tailored Microstructured Hyperpolarizing Matrices for Optimal Magnetic Resonance Imaging. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Matthieu Cavaillès
- Institut de Chimie de Lyon, Laboratory C2P2 UMR 5265-CNRS; Université de Lyon 1-CPE Lyon; CPE Lyon, 43 Bd du 11 Novembre 1918 69616 Villeurbanne France
| | - Aurélien Bornet
- Institut des Sciences et Ingénierie Chimiques; Ecole Polytechnique Fédérale de Lausanne; 1015 Lausanne Switzerland
| | - Xavier Jaurand
- Université de Lyon; Université Claude Bernard Lyon 1; Centre Technologique des Microstructures (CTμ); 5 rue Raphael Dubois 69622 Villeurbanne Cedex France
| | - Basile Vuichoud
- Univ. Lyon; CNRS, Université Claude Bernard Lyon 1; ENS de Lyon; Institut des Sciences Analytiques, UMR 5280; 5 rue de la Doua 69100 Villeurbanne France
| | - David Baudouin
- Institut de Chimie de Lyon, Laboratory C2P2 UMR 5265-CNRS; Université de Lyon 1-CPE Lyon; CPE Lyon, 43 Bd du 11 Novembre 1918 69616 Villeurbanne France
| | - Mathieu Baudin
- Département de Chimie; Ecole Normale Supérieure; PSL Research University; UPMC Univ Paris 06; CNRS; Laboratoire des Biomolécules (LBM); 24 rue de Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06; Ecole Normale Supérieure; CNRS; Laboratoire des Biomolécules (LBM); Paris France
| | - Laurent Veyre
- Institut de Chimie de Lyon, Laboratory C2P2 UMR 5265-CNRS; Université de Lyon 1-CPE Lyon; CPE Lyon, 43 Bd du 11 Novembre 1918 69616 Villeurbanne France
| | - Geoffrey Bodenhausen
- Département de Chimie; Ecole Normale Supérieure; PSL Research University; UPMC Univ Paris 06; CNRS; Laboratoire des Biomolécules (LBM); 24 rue de Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06; Ecole Normale Supérieure; CNRS; Laboratoire des Biomolécules (LBM); Paris France
| | - Jean-Nicolas Dumez
- Institut de Chimie des Substances Naturelles, CNRS UPR2301; Univ. Paris Sud, Université Paris-Saclay; 91190 Gif-sur-Yvette France
| | - Sami Jannin
- Univ. Lyon; CNRS, Université Claude Bernard Lyon 1; ENS de Lyon; Institut des Sciences Analytiques, UMR 5280; 5 rue de la Doua 69100 Villeurbanne France
| | - Christophe Copéret
- Dept. of Chemistry and Applied Biosciences; ETH Zürich; Vladimir-Prelog-Weg 1-5 8093 Zürich Switzerland
| | - Chloé Thieuleux
- Institut de Chimie de Lyon, Laboratory C2P2 UMR 5265-CNRS; Université de Lyon 1-CPE Lyon; CPE Lyon, 43 Bd du 11 Novembre 1918 69616 Villeurbanne France
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Bastiaansen JAM, Yoshihara HAI, Capozzi A, Schwitter J, Gruetter R, Merritt ME, Comment A. Probing cardiac metabolism by hyperpolarized 13C MR using an exclusively endogenous substrate mixture and photo-induced nonpersistent radicals. Magn Reson Med 2018; 79:2451-2459. [PMID: 29411415 DOI: 10.1002/mrm.27122] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 01/11/2018] [Accepted: 01/16/2018] [Indexed: 12/13/2022]
Abstract
PURPOSE To probe the cardiac metabolism of carbohydrates and short chain fatty acids simultaneously in vivo following the injection of a hyperpolarized 13 C-labeled substrate mixture prepared using photo-induced nonpersistent radicals. METHODS Droplets of mixed [1-13 C]pyruvic and [1-13 C]butyric acids were frozen into glassy beads in liquid nitrogen. Ethanol addition was investigated as a means to increase the polarization level. The beads were irradiated with ultraviolet light and the radical concentration was measured by ESR spectroscopy. Following dynamic nuclear polarization in a 7T polarizer, the beads were dissolved, and the radical-free hyperpolarized solution was rapidly transferred into an injection pump located inside a 9.4T scanner. The hyperpolarized solution was injected in healthy rats to measure cardiac metabolism in vivo. RESULTS Ultraviolet irradiation created nonpersistent radicals in a mixture containing 13 C-labeled pyruvic and butyric acids, and enabled the hyperpolarization of both substrates by dynamic nuclear polarization. Ethanol addition increased the radical concentration from 16 to 26 mM. Liquid-state 13 C polarization was 3% inside the pump at the time of injection, and increased to 5% by addition of ethanol to the substrate mixture prior to ultraviolet irradiation. In the rat heart, the in vivo 13 C signals from lactate, alanine, bicarbonate, and acetylcarnitine were detected following the metabolism of the injected substrate mixture. CONCLUSION Copolarization of two different 13 C-labeled substrates and the detection of their myocardial metabolism in vivo was achieved without using persistent radicals. The absence of radicals in the solution containing the hyperpolarized 13 C-substrates may simplify the translation to clinical use, as no radical filtration is required prior to injection.
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Affiliation(s)
- Jessica A M Bastiaansen
- Department of Radiology, University Hospital Lausanne and University of Lausanne, Lausanne, Switzerland.,Institute of Physics, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Laboratory of Functional and Metabolic Imaging, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Hikari A I Yoshihara
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,Division of Cardiology and Cardiac MR Center, University Hospital Lausanne, Lausanne, Switzerland
| | - Andrea Capozzi
- Department of Electrical Engineering, Technical University of Denmark, Copenhagen, Denmark
| | - Juerg Schwitter
- Division of Cardiology and Cardiac MR Center, University Hospital Lausanne, Lausanne, Switzerland
| | - Rolf Gruetter
- Laboratory of Functional and Metabolic Imaging, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Matthew E Merritt
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, Florida, USA
| | - Arnaud Comment
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.,General Electric Healthcare, Pollards Wood, Chalfont St Giles, Buckinghamshire, United Kingdom
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Weber EMM, Vezin H, Kempf JG, Bodenhausen G, Abergél D, Kurzbach D. Anisotropic longitudinal electronic relaxation affects DNP at cryogenic temperatures. Phys Chem Chem Phys 2018; 19:16087-16094. [PMID: 28598474 DOI: 10.1039/c7cp03242k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We report the observation of anisotropic longitudinal electronic relaxation in nitroxide radicals under typical dynamic nuclear polarization conditions. This anisotropy affects the efficiency of dynamic nuclear polarization at cryogenic temperatures of 4 K and high magnetic fields of 6.7 T. Under our experimental conditions, the electron paramagnetic resonance spectrum of nitroxides such as TEMPOL (4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl) is only partly averaged by electronic spectral diffusion, so that the relaxation times T1e(ω) vary across the spectrum. We demonstrate how the anisotropy of T1e(ω) can be taken into account in simple DNP models.
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Affiliation(s)
- E M M Weber
- Département de Chimie, Ecole Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolécules (LBM), 24 rue Lhomond, 75005 Paris, France.
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Bornet A, Pinon A, Jhajharia A, Baudin M, Ji X, Emsley L, Bodenhausen G, Ardenkjaer-Larsen JH, Jannin S. Microwave-gated dynamic nuclear polarization. Phys Chem Chem Phys 2018; 18:30530-30535. [PMID: 27782260 DOI: 10.1039/c6cp05587g] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dissolution dynamic nuclear polarization (D-DNP) has become a method of choice to enhance signals in nuclear magnetic resonance (NMR). Recently, we have proposed to combine cross-polarization (CP) with D-DNP to provide high polarization P(13C) in short build-up times. In this paper, we show that switching microwave irradiation off for a few hundreds of milliseconds prior to CP can significantly boost the efficiency. By implementing microwave gating, 13C polarizations on sodium [1-13C]acetate as high as 64% could be achieved with a polarization build-up time constant as short as 160 s. A polarization of P(13C) = 78% could even be reached for [13C]urea.
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Affiliation(s)
- Aurélien Bornet
- Ecole Polytechnique Fédérale de Lausanne, Institut des Sciences et Ingénierie Chimiques, 1015 Lausanne, Switzerland
| | - Arthur Pinon
- Ecole Polytechnique Fédérale de Lausanne, Institut des Sciences et Ingénierie Chimiques, 1015 Lausanne, Switzerland
| | - Aditya Jhajharia
- Département de Chimie, Ecole Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolécules (LBM), 24 rue Lhomond, 75005 Paris, France and Sorbonne Universités, UPMC Univ Paris 06, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM), Paris, France
| | - Mathieu Baudin
- Ecole Polytechnique Fédérale de Lausanne, Institut des Sciences et Ingénierie Chimiques, 1015 Lausanne, Switzerland and Département de Chimie, Ecole Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolécules (LBM), 24 rue Lhomond, 75005 Paris, France and Sorbonne Universités, UPMC Univ Paris 06, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM), Paris, France
| | - Xiao Ji
- Ecole Polytechnique Fédérale de Lausanne, Institut des Sciences et Ingénierie Chimiques, 1015 Lausanne, Switzerland and Département de Chimie, Ecole Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolécules (LBM), 24 rue Lhomond, 75005 Paris, France and Sorbonne Universités, UPMC Univ Paris 06, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM), Paris, France
| | - Lyndon Emsley
- Ecole Polytechnique Fédérale de Lausanne, Institut des Sciences et Ingénierie Chimiques, 1015 Lausanne, Switzerland
| | - Geoffrey Bodenhausen
- Département de Chimie, Ecole Normale Supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Laboratoire des Biomolécules (LBM), 24 rue Lhomond, 75005 Paris, France and Sorbonne Universités, UPMC Univ Paris 06, Ecole Normale Supérieure, CNRS, Laboratoire des Biomolécules (LBM), Paris, France
| | - Jan Henrik Ardenkjaer-Larsen
- Department of Electrical Engineering, Technical University of Denmark, Lyngby 2800, Denmark and GE Healthcare, Brøndby 2605, Denmark
| | - Sami Jannin
- Ecole Polytechnique Fédérale de Lausanne, Institut des Sciences et Ingénierie Chimiques, 1015 Lausanne, Switzerland and Bruker BioSpin AG, Industriestrasse 26, 8117 Fällanden, Switzerland and Université de Lyon, Université Claude Bernard Lyon 1, CNRS, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France.
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Lilly Thankamony AS, Wittmann JJ, Kaushik M, Corzilius B. Dynamic nuclear polarization for sensitivity enhancement in modern solid-state NMR. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2017; 102-103:120-195. [PMID: 29157490 DOI: 10.1016/j.pnmrs.2017.06.002] [Citation(s) in RCA: 273] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 06/03/2017] [Accepted: 06/08/2017] [Indexed: 05/03/2023]
Abstract
The field of dynamic nuclear polarization has undergone tremendous developments and diversification since its inception more than 6 decades ago. In this review we provide an in-depth overview of the relevant topics involved in DNP-enhanced MAS NMR spectroscopy. This includes the theoretical description of DNP mechanisms as well as of the polarization transfer pathways that can lead to a uniform or selective spreading of polarization between nuclear spins. Furthermore, we cover historical and state-of-the art aspects of dedicated instrumentation, polarizing agents, and optimization techniques for efficient MAS DNP. Finally, we present an extensive overview on applications in the fields of structural biology and materials science, which underlines that MAS DNP has moved far beyond the proof-of-concept stage and has become an important tool for research in these fields.
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Affiliation(s)
- Aany Sofia Lilly Thankamony
- Institute of Physical and Theoretical Chemistry, Institute of Biophysical Chemistry, and Center for Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt, Max-von-Laue-Str. 7-9, 60438 Frankfurt, Germany
| | - Johannes J Wittmann
- Institute of Physical and Theoretical Chemistry, Institute of Biophysical Chemistry, and Center for Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt, Max-von-Laue-Str. 7-9, 60438 Frankfurt, Germany
| | - Monu Kaushik
- Institute of Physical and Theoretical Chemistry, Institute of Biophysical Chemistry, and Center for Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt, Max-von-Laue-Str. 7-9, 60438 Frankfurt, Germany
| | - Björn Corzilius
- Institute of Physical and Theoretical Chemistry, Institute of Biophysical Chemistry, and Center for Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt, Max-von-Laue-Str. 7-9, 60438 Frankfurt, Germany.
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