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Relayed hyperpolarization from para-hydrogen improves the NMR detectability of alcohols

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JournalChemical Science
DateAccepted/In press - 28 Jun 2019
DateE-pub ahead of print - 1 Jul 2019
DatePublished (current) - 7 Sep 2019
Issue number33
Volume10
Number of pages9
Pages (from-to)7709-7717
Early online date1/07/19
Original languageEnglish

Abstract

The detection of alcohols by magnetic resonance techniques is important for their characterization and the monitoring of chemical change. Hyperpolarization processes can make previously inpractical measurements, such as the determination of low concentration intermediates, possible. Here, we investigate the SABRE-Relay method in order to define its key characteristics and improve the resulting 1H NMR signal gains which subsequently approach 103 per proton. We identify optimal amine proton transfer agents for SABRE-Relay and show how catalyst structure influences the outcome. The breadth of the method is revealed by expansion to more complex alcohols and the polarization of heteronuclei.

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© The Royal Society of Chemistry 2019.

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