Long-lived heteronuclear spin-singlet states
We report observation of long-lived spin-singlet states in a 13C-1H spin pair at zero magnetic field. In 13C-labeled formic acid, we observe spin-singlet lifetimes as long as 37 seconds, about a factor of three longer than the T1 lifetime of dipole polarization in the triplet state. We also observe...
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Main Authors | , , , , , , , , |
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Format | Journal Article |
Language | English |
Published |
04.10.2013
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Subjects | |
Online Access | Get full text |
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Summary: | We report observation of long-lived spin-singlet states in a 13C-1H spin pair
at zero magnetic field. In 13C-labeled formic acid, we observe spin-singlet
lifetimes as long as 37 seconds, about a factor of three longer than the T1
lifetime of dipole polarization in the triplet state. We also observe that the
lifetime of the singlet-triplet coherence, T2, is longer than T1. Moreover, we
demonstrate that this singlet states formed by spins of a heteronucleus and a
1H nucleus, can exhibit longer lifetimes than the respective triplet states in
systems consisting of more than two nuclear spins. Although long-lived
homonuclear spin-singlet states have been extensively studied, this is the
first experimental observation of analogous spin-singlets consisting of a
heteronucleus and a proton. |
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DOI: | 10.48550/arxiv.1310.1291 |