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Colell JP, Logan AWJ, Zhou Z, Shchepin RV, Barskiy DA, Ortiz GX, Wang Q, Malcolmson SJ, Chekmenev EY, Warren WS, Theis T. Generalizing, Extending, and Maximizing Nitrogen-15 Hyperpolarization Induced by Parahydrogen in Reversible Exchange. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2017; 121:6626-6634. [PMID: 28392884 PMCID: PMC5378067 DOI: 10.1021/acs.jpcc.6b12097] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 01/13/2017] [Indexed: 05/17/2023]
Abstract
Signal Amplification by Reversible Exchange (SABRE) is a fast and convenient NMR hyperpolarization method that uses cheap and readily available para-hydrogen as a hyperpolarization source. SABRE can hyperpolarize protons and heteronuclei. Here we focus on the heteronuclear variant introduced as SABRE-SHEATH (SABRE in SHield Enables Alignment Transfer to Heteronuclei) and nitrogen-15 targets in particular. We show that 15N-SABRE works more efficiently and on a wider range of substrates than 1H-SABRE, greatly generalizing the SABRE approach. In addition, we show that nitrogen-15 offers significantly extended T1 times of up to 12 minutes. Long T1 times enable higher hyperpolarization levels but also hold the promise of hyperpolarized molecular imaging for several tens of minutes. Detailed characterization and optimization are presented, leading to nitrogen-15 polarization levels in excess of 10% on several compounds.
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Affiliation(s)
- Johannes
F. P. Colell
- Department
of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Angus W. J. Logan
- Department
of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Zijian Zhou
- Department
of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Roman V. Shchepin
- Vanderbilt
University Institute of Imaging Science (VUIIS), Department of Radiology,
Department of Biomedical Engineering, Vanderbilt Ingram Cancer Center
(VICC), Vanderbilt University, Nashville, Tennessee 37232, United States
| | - Danila A. Barskiy
- Vanderbilt
University Institute of Imaging Science (VUIIS), Department of Radiology,
Department of Biomedical Engineering, Vanderbilt Ingram Cancer Center
(VICC), Vanderbilt University, Nashville, Tennessee 37232, United States
| | - Gerardo X. Ortiz
- Department
of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Qiu Wang
- Department
of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Steven J. Malcolmson
- Department
of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - Eduard Y. Chekmenev
- Vanderbilt
University Institute of Imaging Science (VUIIS), Department of Radiology,
Department of Biomedical Engineering, Vanderbilt Ingram Cancer Center
(VICC), Vanderbilt University, Nashville, Tennessee 37232, United States
- Russian
Academy of Sciences, Moscow, Russia
| | - Warren S. Warren
- Department
of Chemistry, Duke University, Durham, North Carolina 27708, United States
- Departments
of Physics, Radiology and Biomedical Engineering, Duke University, Durham, North Carolina 27707, United States
- E-mail:
| | - Thomas Theis
- Department
of Chemistry, Duke University, Durham, North Carolina 27708, United States
- E-mail:
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