The University of Southampton
University of Southampton Institutional Repository

Generalised magnetisation-to-singlet-order transfer in nuclear magnetic resonance

Generalised magnetisation-to-singlet-order transfer in nuclear magnetic resonance
Generalised magnetisation-to-singlet-order transfer in nuclear magnetic resonance
A variety of pulse sequences have been described for converting nuclear spin magnetisation into long-lived singlet order for nuclear spin-1/2 pairs. Existing sequences operate well in two extreme parameter regimes. The magnetisation-to-singlet (M2S) pulse sequence performs a robust conversion of nuclear spin magnetisation into singlet order in the near-equivalent limit, meaning that the difference in chemical shift frequencies of the two spins is much smaller than the spin–spin coupling. Other pulse sequences operate in the strong-inequivalence regime, where the shift difference is much larger than the spin–spin coupling. However both sets of pulse sequences fail in the intermediate regime, where the chemical shift difference and the spin–spin coupling are roughly equal in magnitude. We describe a generalised version of M2S, called gM2S, which achieves robust singlet order excitation for spin systems ranging from the near-equivalence limit well into the intermediate regime. This closes an important gap left by existing pulse sequences. The efficiency of the gM2S sequence is demonstrated numerically and experimentally for near-equivalent and intermediate-regime cases.
1463-9076
9703-9712
Bengs, Christian
cd3282d0-27ad-444f-bcb4-70eeab0029b9
Sabba, Mohamed
86002c7a-3fb8-4629-a13b-fbd6737b3c46
Jerschow, Alexej
4809ea26-1ad9-4f59-a7e4-e66ea2ed6692
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
Bengs, Christian
cd3282d0-27ad-444f-bcb4-70eeab0029b9
Sabba, Mohamed
86002c7a-3fb8-4629-a13b-fbd6737b3c46
Jerschow, Alexej
4809ea26-1ad9-4f59-a7e4-e66ea2ed6692
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3

Bengs, Christian, Sabba, Mohamed, Jerschow, Alexej and Levitt, Malcolm H. (2020) Generalised magnetisation-to-singlet-order transfer in nuclear magnetic resonance. Physical Chemistry Chemical Physics, 22 (17), 9703-9712. (doi:10.1039/D0CP00935K).

Record type: Article

Abstract

A variety of pulse sequences have been described for converting nuclear spin magnetisation into long-lived singlet order for nuclear spin-1/2 pairs. Existing sequences operate well in two extreme parameter regimes. The magnetisation-to-singlet (M2S) pulse sequence performs a robust conversion of nuclear spin magnetisation into singlet order in the near-equivalent limit, meaning that the difference in chemical shift frequencies of the two spins is much smaller than the spin–spin coupling. Other pulse sequences operate in the strong-inequivalence regime, where the shift difference is much larger than the spin–spin coupling. However both sets of pulse sequences fail in the intermediate regime, where the chemical shift difference and the spin–spin coupling are roughly equal in magnitude. We describe a generalised version of M2S, called gM2S, which achieves robust singlet order excitation for spin systems ranging from the near-equivalence limit well into the intermediate regime. This closes an important gap left by existing pulse sequences. The efficiency of the gM2S sequence is demonstrated numerically and experimentally for near-equivalent and intermediate-regime cases.

Text
d0cp00935k - Version of Record
Available under License Creative Commons Attribution.
Download (2MB)

More information

Accepted/In Press date: 18 March 2020
e-pub ahead of print date: 24 April 2020
Published date: 7 May 2020

Identifiers

Local EPrints ID: 440704
URI: http://eprints.soton.ac.uk/id/eprint/440704
ISSN: 1463-9076
PURE UUID: 59d2cf4a-31cd-4a5f-8d4c-70f0f9ca5850
ORCID for Malcolm H. Levitt: ORCID iD orcid.org/0000-0001-9878-1180

Catalogue record

Date deposited: 13 May 2020 17:06
Last modified: 18 Feb 2021 16:56

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×