Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Field-cycling NMR experiments in an ultra-wide magnetic field range : Relaxation and coherent polarization transfer. / Zhukov, Ivan V.; Kiryutin, Alexey S.; Yurkovskaya, Alexandra V. и др.
в: Physical Chemistry Chemical Physics, Том 20, № 18, 09.05.2018, стр. 12396-12405.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Field-cycling NMR experiments in an ultra-wide magnetic field range
T2 - Relaxation and coherent polarization transfer
AU - Zhukov, Ivan V.
AU - Kiryutin, Alexey S.
AU - Yurkovskaya, Alexandra V.
AU - Grishin, Yuri A.
AU - Vieth, Hans Martin
AU - Ivanov, Konstantin L.
PY - 2018/5/9
Y1 - 2018/5/9
N2 - An experimental method is described allowing fast field-cycling Nuclear Magnetic Resonance (NMR) experiments over a wide range of magnetic fields from 5 nT to 10 T. The method makes use of a hybrid technique: the high field range is covered by positioning the sample in the inhomogeneous stray field of the NMR spectrometer magnet. For fields below 2 mT a magnetic shield is mounted on top of the spectrometer; inside the shield the magnetic field is controlled by a specially designed coil system. This combination allows us to measure T1-relaxation times and nuclear Overhauser effect parameters over the full range in a routine way. For coupled proton-carbon spin systems relaxation with a common T1 is found at low fields, where the spins are "strongly coupled". In some cases, experiments at ultralow fields provide access to heteronuclear long-lived spin states. Efficient coherent polarization transfer is seen for proton-carbon spin systems at ultralow fields as follows from the observation of quantum oscillations in the polarization evolution. Applications to analysis and the manipulation of heteronuclear spin systems are discussed.
AB - An experimental method is described allowing fast field-cycling Nuclear Magnetic Resonance (NMR) experiments over a wide range of magnetic fields from 5 nT to 10 T. The method makes use of a hybrid technique: the high field range is covered by positioning the sample in the inhomogeneous stray field of the NMR spectrometer magnet. For fields below 2 mT a magnetic shield is mounted on top of the spectrometer; inside the shield the magnetic field is controlled by a specially designed coil system. This combination allows us to measure T1-relaxation times and nuclear Overhauser effect parameters over the full range in a routine way. For coupled proton-carbon spin systems relaxation with a common T1 is found at low fields, where the spins are "strongly coupled". In some cases, experiments at ultralow fields provide access to heteronuclear long-lived spin states. Efficient coherent polarization transfer is seen for proton-carbon spin systems at ultralow fields as follows from the observation of quantum oscillations in the polarization evolution. Applications to analysis and the manipulation of heteronuclear spin systems are discussed.
KW - PARAHYDROGEN-INDUCED POLARIZATION
KW - DYNAMIC NUCLEAR-POLARIZATION
KW - SCALAR COUPLED SYSTEMS
KW - LIVED SPIN STATES
KW - PARA-HYDROGEN
KW - POLYMER MELTS
KW - RELAXOMETRY
KW - RESONANCE
KW - HYPERPOLARIZATION
KW - DISPERSION
UR - http://www.scopus.com/inward/record.url?scp=85046952707&partnerID=8YFLogxK
U2 - 10.1039/c7cp08529j
DO - 10.1039/c7cp08529j
M3 - Article
C2 - 29623979
AN - SCOPUS:85046952707
VL - 20
SP - 12396
EP - 12405
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
SN - 1463-9076
IS - 18
ER -
ID: 13417887