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Long-lived polarization protected by symmetry.

Publication ,  Journal Article
Feng, Y; Theis, T; Wu, T-L; Claytor, K; Warren, WS
Published in: The Journal of chemical physics
October 2014

In this paper we elucidate, theoretically and experimentally, molecular motifs which permit Long-Lived Polarization Protected by Symmetry (LOLIPOPS). The basic assembly principle starts from a pair of chemically equivalent nuclei supporting a long-lived singlet state and is completed by coupling to additional pairs of spins. LOLIPOPS can be created in various sizes; here we review four-spin systems, introduce a group theory analysis of six-spin systems, and explore eight-spin systems by simulation. The focus is on AA'XnX'n spin systems, where typically the A spins are (15)N or (13)C and X spins are protons. We describe the symmetry of the accessed states, we detail the pulse sequences used to access these states, we quantify the fraction of polarization that can be stored as LOLIPOPS, we elucidate how to access the protected states from A or from X polarization and we examine the behavior of these spin systems upon introduction of a small chemical shift difference.

Duke Scholars

Published In

The Journal of chemical physics

DOI

EISSN

1089-7690

ISSN

0021-9606

Publication Date

October 2014

Volume

141

Issue

13

Start / End Page

134307

Related Subject Headings

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  • Models, Molecular
  • Maleic Anhydrides
  • Magnetic Resonance Spectroscopy
  • Computer Simulation
  • Chemical Physics
  • Alkynes
  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences
 

Citation

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Feng, Y., Theis, T., Wu, T.-L., Claytor, K., & Warren, W. S. (2014). Long-lived polarization protected by symmetry. The Journal of Chemical Physics, 141(13), 134307. https://doi.org/10.1063/1.4896895
Feng, Yesu, Thomas Theis, Tung-Lin Wu, Kevin Claytor, and Warren S. Warren. “Long-lived polarization protected by symmetry.The Journal of Chemical Physics 141, no. 13 (October 2014): 134307. https://doi.org/10.1063/1.4896895.
Feng Y, Theis T, Wu T-L, Claytor K, Warren WS. Long-lived polarization protected by symmetry. The Journal of chemical physics. 2014 Oct;141(13):134307.
Feng, Yesu, et al. “Long-lived polarization protected by symmetry.The Journal of Chemical Physics, vol. 141, no. 13, Oct. 2014, p. 134307. Epmc, doi:10.1063/1.4896895.
Feng Y, Theis T, Wu T-L, Claytor K, Warren WS. Long-lived polarization protected by symmetry. The Journal of chemical physics. 2014 Oct;141(13):134307.

Published In

The Journal of chemical physics

DOI

EISSN

1089-7690

ISSN

0021-9606

Publication Date

October 2014

Volume

141

Issue

13

Start / End Page

134307

Related Subject Headings

  • Pyridazines
  • Models, Molecular
  • Maleic Anhydrides
  • Magnetic Resonance Spectroscopy
  • Computer Simulation
  • Chemical Physics
  • Alkynes
  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences