Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Fast destruction of singlet order in NMR experiments. / Rodin, Bogdan A.; Sheberstov, Kirill F.; Kiryutin, Alexey S. и др.
в: Journal of Chemical Physics, Том 151, № 23, 234203, 21.12.2019.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Fast destruction of singlet order in NMR experiments
AU - Rodin, Bogdan A.
AU - Sheberstov, Kirill F.
AU - Kiryutin, Alexey S.
AU - Brown, Lynda J.
AU - Brown, Richard C.D.
AU - Sabba, Mohamed
AU - Levitt, Malcolm H.
AU - Yurkovskaya, Alexandra V.
AU - Ivanov, Konstantin L.
PY - 2019/12/21
Y1 - 2019/12/21
N2 - Some nuclear spin systems support long-lived states, which display greatly extended relaxation times relative to the relaxation time of nuclear spin magnetization. In spin-1/2 pairs, such a long-lived state is given by singlet order, representing the difference of the population of the nuclear singlet state and the mean population of the three triplets. In many cases, the experiments with long-lived singlet order are very time-consuming because of the need to wait for singlet order decay before the experiment can be repeated; otherwise, spin order remaining from a previous measurement may lead to experimental artifacts. Here, we propose techniques for fast and efficient singlet order destruction. These methods exploit coherent singlet-triplet conversion; in some cases, multiple conversion steps are introduced. We demonstrate that singlet order destruction enables a dramatic reduction of the waiting time between consecutive experiments and suggest to use this approach in singlet-state Nuclear Magnetic Resonance (NMR) experiments with nearly equivalent spins.
AB - Some nuclear spin systems support long-lived states, which display greatly extended relaxation times relative to the relaxation time of nuclear spin magnetization. In spin-1/2 pairs, such a long-lived state is given by singlet order, representing the difference of the population of the nuclear singlet state and the mean population of the three triplets. In many cases, the experiments with long-lived singlet order are very time-consuming because of the need to wait for singlet order decay before the experiment can be repeated; otherwise, spin order remaining from a previous measurement may lead to experimental artifacts. Here, we propose techniques for fast and efficient singlet order destruction. These methods exploit coherent singlet-triplet conversion; in some cases, multiple conversion steps are introduced. We demonstrate that singlet order destruction enables a dramatic reduction of the waiting time between consecutive experiments and suggest to use this approach in singlet-state Nuclear Magnetic Resonance (NMR) experiments with nearly equivalent spins.
KW - LONG-LIVED STATES
KW - NUCLEAR-SPIN STATES
KW - DIFFUSION-COEFFICIENTS
KW - SLOW DIFFUSION
KW - POLARIZATION
KW - SPECTROSCOPY
KW - MOLECULES
KW - CONTRAST
KW - HYDROGEN
KW - FIELD
UR - http://www.scopus.com/inward/record.url?scp=85077014413&partnerID=8YFLogxK
U2 - 10.1063/1.5131730
DO - 10.1063/1.5131730
M3 - Article
C2 - 31864263
AN - SCOPUS:85077014413
VL - 151
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
SN - 0021-9606
IS - 23
M1 - 234203
ER -
ID: 22992901