Only Para-Hydrogen Spectroscopy (OPSY) Revisited: In-Phase Spectra for Chemical Analysis and Imaging

Andrey N. Pravdivtsev, Vitaly P. Kozinenko, Jan Bernd Hövener

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We revisited only para-hydrogen spectroscopy (OPSY) for the analysis of para-hydrogen-enhanced NMR spectra at high magnetic fields. We found that the sign of the gradients and interpulse delays are pivotal for the performance of the sequence: the variant of double-quantum filter OPSY, where the second time interval is twice as long as the first one (OPSYd-12) converts the antiphase spectrum to in-phase and efficiently suppresses the background signal in a single scan better than the other variants. OPSYd-12 strongly facilitates the analysis of para-hydrogen-derived NMR spectra in homogeneous and inhomogeneous magnetic fields. Furthermore, the net magnetization produced is essential for subsequent applications such as imaging, e.g., in a reaction chamber or in vivo.

Original languageEnglish
Pages (from-to)8948-8956
Number of pages9
JournalJournal of Physical Chemistry A
Volume122
Issue number45
DOIs
Publication statusPublished - 15 Nov 2018

Keywords

  • PARAHYDROGEN INDUCED POLARIZATION
  • NMR SIGNAL ENHANCEMENT
  • SINGLET SPIN STATES
  • PASADENA HYPERPOLARIZATION
  • REVERSIBLE EXCHANGE
  • COHERENT EVOLUTION
  • ORDER TRANSFER
  • C-13
  • RESONANCE
  • SABRE

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