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Extremely low-frequency spectroscopy in low-field nuclear magnetic resonance

Extremely low-frequency spectroscopy in low-field nuclear magnetic resonance
Extremely low-frequency spectroscopy in low-field nuclear magnetic resonance
We demonstrate a new phenomenon in nuclear magnetic resonance spectroscopy, in which nuclear spin transitions are induced by radio frequency irradiation at extremely low frequencies (of the order of a few Hz). Slow Rabi oscillations are observed between spin states of different exchange symmetry. These “forbidden” transitions are rendered weakly allowed by differential electronic shielding effects on the radio frequency field. We generate coherence between the singlet and triplet states of 15N-labeled nitrous oxide in solution, and estimate the scalar coupling between the two 15N nuclei with a precision of a few mHz.
083002-[4pp]
Pileio, Giuseppe
13f78e66-0707-4438-b9c9-6dbd3eb7d4e8
Carravetta, Marina
1b12fa96-4a6a-4689-ab3b-ccc68f1d7691
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
Pileio, Giuseppe
13f78e66-0707-4438-b9c9-6dbd3eb7d4e8
Carravetta, Marina
1b12fa96-4a6a-4689-ab3b-ccc68f1d7691
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3

Pileio, Giuseppe, Carravetta, Marina and Levitt, Malcolm H. (2009) Extremely low-frequency spectroscopy in low-field nuclear magnetic resonance. Physical Review Letters, 103 (8), 083002-[4pp]. (doi:10.1103/PhysRevLett.103.083002).

Record type: Article

Abstract

We demonstrate a new phenomenon in nuclear magnetic resonance spectroscopy, in which nuclear spin transitions are induced by radio frequency irradiation at extremely low frequencies (of the order of a few Hz). Slow Rabi oscillations are observed between spin states of different exchange symmetry. These “forbidden” transitions are rendered weakly allowed by differential electronic shielding effects on the radio frequency field. We generate coherence between the singlet and triplet states of 15N-labeled nitrous oxide in solution, and estimate the scalar coupling between the two 15N nuclei with a precision of a few mHz.

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Published date: 20 August 2009
Organisations: Chemistry

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Local EPrints ID: 145537
URI: http://eprints.soton.ac.uk/id/eprint/145537
PURE UUID: 5abee531-89cd-499e-9cab-1fe052bd1014
ORCID for Giuseppe Pileio: ORCID iD orcid.org/0000-0001-9223-3896
ORCID for Marina Carravetta: ORCID iD orcid.org/0000-0002-6296-2104
ORCID for Malcolm H. Levitt: ORCID iD orcid.org/0000-0001-9878-1180

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Date deposited: 19 Apr 2010 10:25
Last modified: 17 Dec 2019 01:52

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Author: Giuseppe Pileio ORCID iD

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