Enhancement of SQUID-Detected NMR Signals with Hyperpolarized Liquid [Formula presented] in a [Formula presented] Magnetic Field

J. J. Heckman; M. P. Ledbetter; M. V. Romalis

doi:10.1103/PhysRevLett.91.067601

Enhancement of SQUID-Detected NMR Signals with Hyperpolarized Liquid [Formula presented] in a [Formula presented] Magnetic Field

J. J. Heckman, M. P. Ledbetter, M. V. Romalis

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2 Scopus citations

Abstract

We report an enhancement of proton NMR signals by a factor of [Formula presented] by cross polarization with hyperpolarized liquid [Formula presented] in an ultralow magnetic field of [Formula presented]. The NMR signals from cyclopentane, acetone, and methanol are detected using a commercial high-[Formula presented] SQUID magnetometer with a signal-to-noise ratio of up to 1000 from a single [Formula presented] tipping pulse. This technique allows a wide range of low-field NMR measurements and is promising for the detection of intermolecular scalar spin-spin couplings. Scalar intermolecular couplings can produce a shift of the average NMR frequency in a hyperpolarized sample even in the presence of rapid chemical exchange.

Original language	English (US)
Journal	Physical review letters
Volume	91
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.91.067601
State	Published - Aug 5 2003

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.91.067601

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title = "Enhancement of SQUID-Detected NMR Signals with Hyperpolarized Liquid [Formula presented] in a [Formula presented] Magnetic Field",

abstract = "We report an enhancement of proton NMR signals by a factor of [Formula presented] by cross polarization with hyperpolarized liquid [Formula presented] in an ultralow magnetic field of [Formula presented]. The NMR signals from cyclopentane, acetone, and methanol are detected using a commercial high-[Formula presented] SQUID magnetometer with a signal-to-noise ratio of up to 1000 from a single [Formula presented] tipping pulse. This technique allows a wide range of low-field NMR measurements and is promising for the detection of intermolecular scalar spin-spin couplings. Scalar intermolecular couplings can produce a shift of the average NMR frequency in a hyperpolarized sample even in the presence of rapid chemical exchange.",

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AU - Romalis, M. V.

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N2 - We report an enhancement of proton NMR signals by a factor of [Formula presented] by cross polarization with hyperpolarized liquid [Formula presented] in an ultralow magnetic field of [Formula presented]. The NMR signals from cyclopentane, acetone, and methanol are detected using a commercial high-[Formula presented] SQUID magnetometer with a signal-to-noise ratio of up to 1000 from a single [Formula presented] tipping pulse. This technique allows a wide range of low-field NMR measurements and is promising for the detection of intermolecular scalar spin-spin couplings. Scalar intermolecular couplings can produce a shift of the average NMR frequency in a hyperpolarized sample even in the presence of rapid chemical exchange.

AB - We report an enhancement of proton NMR signals by a factor of [Formula presented] by cross polarization with hyperpolarized liquid [Formula presented] in an ultralow magnetic field of [Formula presented]. The NMR signals from cyclopentane, acetone, and methanol are detected using a commercial high-[Formula presented] SQUID magnetometer with a signal-to-noise ratio of up to 1000 from a single [Formula presented] tipping pulse. This technique allows a wide range of low-field NMR measurements and is promising for the detection of intermolecular scalar spin-spin couplings. Scalar intermolecular couplings can produce a shift of the average NMR frequency in a hyperpolarized sample even in the presence of rapid chemical exchange.

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Enhancement of SQUID-Detected NMR Signals with Hyperpolarized Liquid [Formula presented] in a [Formula presented] Magnetic Field

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