Accessing long lived (1)H states via (2)H couplings.

Journal Article

In this paper we demonstrate long-lived states involving a pair of chemically equivalent protons, with lifetimes ∼30 times T1 up to a total lifetime of ∼117s at high field (8.45T). This is demonstrated on trans-ethylene-d2 in solution, where magnetic inequivalence gives access to the long-lived states. It is shown that the remaining J-coupling between the two quadrupolar deuterium spins, JQQ, splits the conditions for optimally generating proton singlet states. Detailed simulations of the spin evolution are performed, shedding light on the coherent evolution during singlet-triplet conversion as well as on the incoherent evolution that causes relaxation. Subsequently, the simulations are compared with experimental results validating the theoretical insights. Possible applications include storage of hyperpolarization in the proton long-lived state. Of particular interest may be utilization of parahydrogen induced polarization to directly induce the examined long-lived states.

Full Text

Duke Authors

Cited Authors

  • Zhou, Z; Claytor, K; Warren, WS; Theis, T

Published Date

  • February 2016

Published In

Volume / Issue

  • 263 /

Start / End Page

  • 108 - 115

PubMed ID

  • 26774648

Pubmed Central ID

  • 26774648

Electronic International Standard Serial Number (EISSN)

  • 1096-0856

International Standard Serial Number (ISSN)

  • 1090-7807

Digital Object Identifier (DOI)

  • 10.1016/j.jmr.2015.12.020


  • eng