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Published on: July 19, 2019
Selective excitation doubles the transfer of parahydrogen-induced polarization to heteronuclei
Andrey N Pravdivtsev1, Frowin Ellermann1, Jan-Bernd Hövener1
1Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, Kiel, 24118, Germany. andrey.pravdivtsev@rad.uni-kiel.de.
Abstract:
In this work, we present a new pulse sequence to transform the spin order added to a molecule after the pairwise addition of parahydrogen into 13C polarization. Using a selective 90° preparation instead of a non-selective 45° excitation, the new variant performed twice as well as previous implementations in both simulations and experiments, exemplified with hyperpolarized ethyl acetate. This concept is expected to extend to other nuclei and other spin order transfer schemes that use non-selective excitation.
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