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Burueva DB, Pokochueva EV, Wang X, Filkins M, Svyatova A, Rigby SP, Wang C, Pavlovskaya GE, Kovtunov KV, Meersmann T, Koptyug IV. In Situ Monitoring of Heterogeneous Catalytic Hydrogenation via 129Xe NMR Spectroscopy and Proton MRI. ACS Catal 2019. [DOI: 10.1021/acscatal.9b05000] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Dudari B. Burueva
- International Tomography Center SB RAS, 3A Institutskaya St., 630090 Novosibirsk, Russia
- Novosibirsk State University, 2 Pirogova St., 630090 Novosibirsk, Russia
| | - Ekaterina V. Pokochueva
- International Tomography Center SB RAS, 3A Institutskaya St., 630090 Novosibirsk, Russia
- Novosibirsk State University, 2 Pirogova St., 630090 Novosibirsk, Russia
| | - Xinpei Wang
- Faculty of Science and Engineering, University of Nottingham Ningbo China, 199 Taikang East RD, Ningbo 315100, China
- Sir Peter Mansfield Imaging Centre, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Max Filkins
- Department of Chemical and Environmental Engineering, University of Nottingham, Nottingham NG7 2RD, United Kingdom
- Sir Peter Mansfield Imaging Centre, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Alexandra Svyatova
- International Tomography Center SB RAS, 3A Institutskaya St., 630090 Novosibirsk, Russia
- Novosibirsk State University, 2 Pirogova St., 630090 Novosibirsk, Russia
| | - Sean P. Rigby
- Department of Chemical and Environmental Engineering, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Chengbo Wang
- Faculty of Science and Engineering, University of Nottingham Ningbo China, 199 Taikang East RD, Ningbo 315100, China
| | - Galina E. Pavlovskaya
- Sir Peter Mansfield Imaging Centre, University of Nottingham, Nottingham NG7 2RD, United Kingdom
- Division of Respiratory Medicine, School of Medicine, University of Nottingham, Nottingham NG7 2HU, United Kingdom
| | - Kirill V. Kovtunov
- International Tomography Center SB RAS, 3A Institutskaya St., 630090 Novosibirsk, Russia
- Novosibirsk State University, 2 Pirogova St., 630090 Novosibirsk, Russia
| | - Thomas Meersmann
- Sir Peter Mansfield Imaging Centre, University of Nottingham, Nottingham NG7 2RD, United Kingdom
- Division of Respiratory Medicine, School of Medicine, University of Nottingham, Nottingham NG7 2HU, United Kingdom
| | - Igor V. Koptyug
- International Tomography Center SB RAS, 3A Institutskaya St., 630090 Novosibirsk, Russia
- Novosibirsk State University, 2 Pirogova St., 630090 Novosibirsk, Russia
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Imai H, Yoshimura H, Kimura A, Fujiwara H. Continuous flow production of concentrated hyperpolarized xenon gas from a dilute xenon gas mixture by buffer gas condensation. Sci Rep 2017; 7:7352. [PMID: 28779105 PMCID: PMC5544720 DOI: 10.1038/s41598-017-07695-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 07/03/2017] [Indexed: 11/22/2022] Open
Abstract
We present a new method for the continuous flow production of concentrated hyperpolarized xenon-129 (HP 129Xe) gas from a dilute xenon (Xe) gas mixture with high nuclear spin polarization. A low vapor pressure (i.e., high boiling-point) gas was introduced as an alternative to molecular nitrogen (N2), which is the conventional quenching gas for generating HP 129Xe via Rb-Xe spin-exchange optical-pumping (SEOP). In contrast to the generally used method of extraction by freezing Xe after the SEOP process, the quenching gas separated as a liquid at moderately low temperature so that Xe was maintained in its gaseous state, allowing the continuous delivery of highly polarized concentrated Xe gas. We selected isobutene as the candidate quenching gas and our method was demonstrated experimentally while comparing its performance with N2. Isobutene could be liquefied and removed from the Xe gas mixture using a cold trap, and the concentrated HP 129Xe gas exhibited a significantly enhanced nuclear magnetic resonance (NMR) signal. Although the system requires further optimization depending on the intended purpose, our approach presented here could provide a simple means for performing NMR or magnetic resonance imaging (MRI) measurements continuously using HP 129Xe with improved sensitivity.
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Affiliation(s)
- Hirohiko Imai
- Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan. .,Graduate School of Informatics, Kyoto University, Kyoto, 606-8501, Japan.
| | | | - Atsuomi Kimura
- Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
| | - Hideaki Fujiwara
- Graduate School of Medicine, Osaka University, Osaka, 565-0871, Japan
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Molecular hydrogen and catalytic combustion in the production of hyperpolarized 83Kr and 129Xe MRI contrast agents. Proc Natl Acad Sci U S A 2016; 113:3164-8. [PMID: 26961001 DOI: 10.1073/pnas.1600379113] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Hyperpolarized (hp) (83)Kr is a promising MRI contrast agent for the diagnosis of pulmonary diseases affecting the surface of the respiratory zone. However, the distinct physical properties of (83)Kr that enable unique MRI contrast also complicate the production of hp (83)Kr. This work presents a previously unexplored approach in the generation of hp (83)Kr that can likewise be used for the production of hp (129)Xe. Molecular nitrogen, typically used as buffer gas in spin-exchange optical pumping (SEOP), was replaced by molecular hydrogen without penalty for the achievable hyperpolarization. In this particular study, the highest obtained nuclear spin polarizations were P =29% for(83)Kr and P= 63% for (129)Xe. The results were reproduced over many SEOP cycles despite the laser-induced on-resonance formation of rubidium hydride (RbH). Following SEOP, the H2 was reactively removed via catalytic combustion without measurable losses in hyperpolarized spin state of either (83)Kr or (129)Xe. Highly spin-polarized (83)Kr can now be purified for the first time, to our knowledge, to provide high signal intensity for the advancement of in vivo hp (83)Kr MRI. More generally, a chemical reaction appears as a viable alternative to the cryogenic separation process, the primary purification method of hp(129)Xe for the past 2 1/2 decades. The inherent simplicity of the combustion process will facilitate hp (129)Xe production and should allow for on-demand continuous flow of purified and highly spin-polarized (129)Xe.
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Zamberlan F, Lesbats C, Rogers NJ, Krupa JL, Pavlovskaya GE, Thomas NR, Faas HM, Meersmann T. Molecular Sensing with Hyperpolarized129Xe Using Switchable Chemical Exchange Relaxation Transfer. Chemphyschem 2015; 16:2294-8. [DOI: 10.1002/cphc.201500367] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Indexed: 11/06/2022]
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Schnurr M, Witte C, Schröder L. Functionalized 129Xe as a potential biosensor for membrane fluidity. Phys Chem Chem Phys 2013; 15:14178-81. [DOI: 10.1039/c3cp51227d] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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