Hyperpolarization of cis-¹⁵ N₂ -Azobenzene by Parahydrogen at Ultralow Magnetic Fields*.

ABSTRACT: The development of nuclear spins hyperpolarization, and the search for molecules that can be efficiently hyperpolarized is an active area in nuclear magnetic resonance. In this work we present a detailed study of SABRE SHEATH (signal amplification by reversible exchange in shield enabled alignment transfer to heteronuclei) experiments on ¹⁵ N₂ -azobenzene. In SABRE SHEATH experiments the nuclear spins of the target are hyperpolarized through transfer of spin polarization from parahydrogen at ultralow fields during a reversible chemical process. Azobenzene exists in two isomers, trans and cis. We show that all nuclear spins in cis-azobenzene can be efficiently hyperpolarized by SABRE at suitable magnetic fields. Enhancement factors (relative to 9.4 T) reach up to 3000

SUBMITTER: Sheberstov KF 

PROVIDER: S-EPMC8361944 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature