Polarization of low-γ nuclei by transferring spin order of parahydrogen at high magnetic fields

Результат исследования: Научные публикации в периодических изданияхстатья

1 Цитирования (Scopus)

Аннотация

In this work, we optimize the performance of a previously proposed method for transferring parahydrogen induced polarization to “insensitive” spin-1/2 NMR (Nuclear Magnetic Resonance) nuclei, which have low gyromagnetic ratio and low natural abundance. By optimizing the reaction conditions and pressure of the parahydrogen gas and using adiabatically switched radiofrequency fields we achieve high polarization transfer efficiency and report carbon spin polarization of dimethyl acetylene dicarboxylate reaching 35%, which corresponds to 13C NMR signal enhancements of about 43,000 at 9.4 Tesla. Such polarization levels allow one to work with mM concentrations at natural carbon abundance and to detect 13C NMR signal in single scan. In combination with a pseudo phase cycle, the polarization transfer method used here also enables efficient suppression of unwanted background signals.

Язык оригиналаанглийский
Номер статьи106594
Число страниц7
ЖурналJournal of Magnetic Resonance
Том309
DOI
СостояниеОпубликовано - 1 дек 2019

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