title: Transfer of the Haupt-hyperpolarization to neighbor spins.
abstract: The NMR hyperpolarization observed for freely rotating methyl groups by exerting a temperature jump from 4.2 K to 298 K can be transferred to spins which have a spin, spin coupling with the carbon of the methyl group. First, a spin echo sequence readjusts the primary up/down signals to an in-phase multiplet. This in-phase magnetization is then decoupled and transferred by a simple COSY step using one scan. The polarization factors at the neighbor spins are about 50 by comparing their signal-to-noise ratio with the signal strength after full relaxation.
authors.affiliation: Institute of Analytical Chemistry, University of Leipzig, Johannisallee 29, 04103 Leipzig, Germany.
authors.forename: Maik
authors.initials: M
authors.lastname: Icker
authors.forename: Pascal
authors.initials: P
authors.lastname: Fricke
authors.forename: Stefan
authors.initials: S
authors.lastname: Berger