Research output: Contribution to journal › Article › peer-review
Polarization of low-γ nuclei by transferring spin order of parahydrogen at high magnetic fields. / Kozinenko, Vitaly P.; Kiryutin, Alexey S.; Yurkovskaya, Alexandra V. et al.
In: Journal of Magnetic Resonance, Vol. 309, 106594, 01.12.2019.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Polarization of low-γ nuclei by transferring spin order of parahydrogen at high magnetic fields
AU - Kozinenko, Vitaly P.
AU - Kiryutin, Alexey S.
AU - Yurkovskaya, Alexandra V.
AU - Ivanov, Konstantin L.
N1 - Publisher Copyright: © 2019 Elsevier Inc.
PY - 2019/12/1
Y1 - 2019/12/1
N2 - 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.
AB - 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.
KW - PARA-HYDROGEN
KW - HYPERPOLARIZATION
KW - NMR
KW - RESONANCE
KW - C-13
KW - ENHANCE
KW - STATES
KW - LEVEL
KW - MRI
UR - http://www.scopus.com/inward/record.url?scp=85072640543&partnerID=8YFLogxK
U2 - 10.1016/j.jmr.2019.106594
DO - 10.1016/j.jmr.2019.106594
M3 - Article
C2 - 31569052
AN - SCOPUS:85072640543
VL - 309
JO - Journal of Magnetic Resonance
JF - Journal of Magnetic Resonance
SN - 1090-7807
M1 - 106594
ER -
ID: 21609143