Efficient Hyperpolarization of U-13 C-Glucose Using Narrow-Line UV-Generated Labile Free Radicals

Andrea Capozzi*, Saket Patel, Christine Pepke Gunnarsson, Irene Marco-Rius, Arnaud Comment, Magnus Karlsson, Mathilde Hauge Lerche, Olivier Ouari, Jan Henrik Ardenkjær-Larsen

*Corresponding author for this work

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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 % [1-13C]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 13C 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 %.
Original languageEnglish
JournalANGEWANDTE CHEMIE
Volume57
Pages (from-to)1 – 6
ISSN1433-7851
DOIs
Publication statusPublished - 2018

Keywords

  • NMR spectroscopy
  • Glucose
  • Hyperpolarization
  • Radicals

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