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Published on: July 4, 2016
Transfer of the Haupt-hyperpolarization to neighbor spins
Maik Icker1, Pascal Fricke, Stefan Berger
1Institute of Analytical Chemistry, University of Leipzig, Johannisallee 29, 04103 Leipzig, Germany.
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.
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