Details

Autor(en) / Beteiligte

• Pravdivtsev, Andrey N.
• Kiryutin, Alexey S.
• Yurkovskaya, Alexandra V.
• Vieth, Hans-Martin
• Ivanov, Konstantin L.

Titel

Robust conversion of singlet spin order in coupled spin-1/2 pairs by adiabatically ramped RF-fields

Ist Teil von

• Journal of magnetic resonance (1997), 2016-12, Vol.273, p.56-64

Ort / Verlag

United States: Elsevier Inc

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •A general method for generating long-lived spin states is proposed.•Adiabatic switching of an RF-field enables singlet spin order formation.•The technique works for strongly-coupled as well as for weakly-coupled spin pairs.•Long-lived spin states of peptide methylene protons are analyzed. We propose a robust and highly efficient NMR technique to create singlet spin order from longitudinal spin magnetization in coupled spin-½ pairs and to perform backward conversion (singlet order)→magnetization. In this method we exploit adiabatic ramping of an RF-field in order to drive transitions between the singlet state and the T± triplet states of a spin pair under study. We demonstrate that the method works perfectly for both strongly and weakly coupled spin pairs, providing a conversion efficiency between the singlet spin order and magnetization, which is equal to the theoretical maximum. We anticipate that the proposed technique is useful for generating long-lived singlet order, for preserving spin hyperpolarization and for analyzing singlet spin order in nearly equivalent spin pairs in specially designed molecules and in low-field NMR studies.